Kent ready mix concrete delivery and pumping

How to Find a Good Patio Contractor

Have you decided you want a flagstone, limestone or concrete patio for your Washington home. Wondering how to get it done and who you should use? Well, I’m going to tell you how. I’m going to give you a step by step process stating the 3 red flags that signal a bad or uneducated [tag] contractor. These 3 things will ensure you get it done the right way, by the right ready mix concrete delivery and pumping contractor in Washington .

Steps To Finding The Right Concrete Contractor in Washington

First step, first things first. Every Stone Installation Needs A Concrete Footing which might also be called a concrete foundation . This is not opinion but fact. If you want it done right and want it to withstand the test of time, this is the way it’s done, no exceptions. A red flag should go up when any contractor is offering bypassing a concrete foundation as a cost saving option. Unfortunately 85% of the ready mix concrete delivery and pumping contractors out there will tell you they can lay the stone right on top of compacted granite or base material. This type of contractor is exactly who you want to avoid. While what they are recommending to you gives the appearance of a patio, it won’t withstand the climate, erosion and soil movement beneath the patio in Washington .

BEWARE OF CONCRETE CONTRACTOR SCAMS

You might get a few crackless years at best, until it begins to fall apart. This method is the most recommended scam or shortcut of trying to lower pricing and still get the job. Notice the price came down because the concrete footing was removed from the job cost. This option of ” no concrete necessary” is most often offered to those with strict financial limitations. The contractors offering this solution don’t care about your patio or home, they just want your money.With no concrete foundation you get a type of patio, but it’s really just a veneer laid on the ground.

How much concrete do i need?

A concrete patio or sidewalk slab or footing should be a minimum of 4 inches thick. This is sometimes reduced to around 3 1/2 inches due to preexisting structural limitations for ready mix concrete delivery and pumping in Washington . If you encounter space limitations, you really do need a good masonry contractor to resolve the issues with other options. this leads us to our next step.

The 2nd step is hire a knowledgeable masonry contractor in Washington . Do a little research before you start getting pricing. Most good masonry contractors will be able to talk concrete chemistry and technology with you. Yes, I said technology. In the last 10 years there have been some really cool advances in concrete additives and mixes. These advances have provided solutions for the problems and limitations of old. A true patio or masonry professional will be able to talk shop with you, it’s his livelihood. A contractor who can’t do this or doesn’t seem comfortable is more than likely a novice at best. This should be the other red flag that goes up. Basically, Concrete slabs and mortar are like a cake mix. Correctly mixing the ingredients and correctly letting the slab or masonry product cure, are the factors that determine a good solid installation. Again, Talk with your contractor and Make sure he’s knowledgeable about the chemistry, additives and curing process of concrete & masonry. If he is this will ensure the likelihood of a great patio. 3rd step and last but definitely not least, Check references, check reviews and ask to see work they’ve done. Really check this stuff out and try to look at at least 1 job they have done. Ask point blank if the previous client is related to the contractor. Any resistance or confusion in this process would be red flag number

3.So, in order from 1 to 3. All masonry installations need a concrete footing. Make sure your patio contractor is knowledgeable about masonry chemistry, additives and enhancing solutions. Check references, reviews and stay away from the dirt cheap deals of a lifetime from any concrete contractor in Washington .If you get even 1 red flag, get another contractor. There are enough guys out there that do know what they’re doing.

What Does a Concrete Contractor Do?

We are always looking for ways that we can add to our home. It might be in adding a specific type of siding or roofing, through updating the landscaping or perhaps by making our driveway smoother and easier to use, but the reality is that we are always on the lookout for something that can help us stand out from the rest.

When it comes to adding a feature that is practical and yet versatile one such option is to incorporate concrete construction elements. Be it a masonry patio, an outdoor fireplace, building a lanai or having an outdoor kitchen, the use for masonry are as numerous and varied as your imagination or budget. And, speaking of budget, because of its durability and ease of maintenance, opting for concrete construction is one of the most budget friendly choices available.

4. Need help with erosion? Add a masonry retaining wall and keep the dirt and lawn where you want it.

5. Use concrete to design a raised bed area for your yard

Concrete construction is nothing new, as it has been used in architecture for years. However, we sometimes forget just how perfect it is for so many decorative elements. If you are trying to determine what to do with the appearance of your home or landscape, be sure to consider employing masonry features. You just might be surprised at their versatility. Talk to a local concrete professional today.

How to Choose the Right Concrete Contractor?

A popular option for updating an old patio is concrete resurfacing. The patio area often gets old and worn after a while. Fixing small cracks before they turn into large problems can save a lot of money. As long as the area is still in decent condition, with no extremely large or uneven cracks, resurfacing is an option. It is also a much better option that breaking up the entire area and starting over, and is less expensive. Deciding whether to hire or contractor or embark on a do-it-yourself project needs to be considered. There are many qualified contractors available to do the job quickly and professionally. This option may cost a little bit more, but the contractors generally have years of experience. A less expensive option is to make a trip to the hardware store. Some people do not feel comfortable taking on such a project. The final decision comes down individual ability to take on such projects.To begin the do-it-yourself project, the patio needs to be power washed. Concrete should then be mixed and applied on the wet surface with a masonry trowel. Running a broom over the concrete will make the surface more slip-resistant. The final step is just to let the area dry. Drying times will vary, but generally at least 6-8 hours. The steps are relatively easy if followed correctly. A contractor may also suggest a concrete overlay. This option can easily sprayed or spread on in the same way as regular concrete. The advantages to the overlay are the ability for different colors, textures, and stenciling can be added. This can give a whole new look to the patio. The overlay is also quick drying and resistant to chemicals and weather.

Washington patio concrete contractors

Kent patio concrete contractors

How to Find a Good Patio Contractor

Have you decided you want a flagstone, limestone or concrete patio for your Washington home. Wondering how to get it done and who you should use? Well, I’m going to tell you how. I’m going to give you a step by step process stating the 3 red flags that signal a bad or uneducated [tag] contractor. These 3 things will ensure you get it done the right way, by the right decorative concrete contractors contractor in Washington .

Steps To Finding The Right Concrete Contractor in Washington

First step, first things first. Every Stone Installation Needs A Concrete Footing which might also be called a concrete foundation . This is not opinion but fact. If you want it done right and want it to withstand the test of time, this is the way it’s done, no exceptions. A red flag should go up when any contractor is offering bypassing a concrete foundation as a cost saving option. Unfortunately 85% of the decorative concrete contractors contractors out there will tell you they can lay the stone right on top of compacted granite or base material. This type of contractor is exactly who you want to avoid. While what they are recommending to you gives the appearance of a patio, it won’t withstand the climate, erosion and soil movement beneath the patio in Washington .

BEWARE OF CONCRETE CONTRACTOR SCAMS

You might get a few crackless years at best, until it begins to fall apart. This method is the most recommended scam or shortcut of trying to lower pricing and still get the job. Notice the price came down because the concrete footing was removed from the job cost. This option of ” no concrete necessary” is most often offered to those with strict financial limitations. The contractors offering this solution don’t care about your patio or home, they just want your money.With no concrete foundation you get a type of patio, but it’s really just a veneer laid on the ground.

How much concrete do i need?

A concrete patio or sidewalk slab or footing should be a minimum of 4 inches thick. This is sometimes reduced to around 3 1/2 inches due to preexisting structural limitations for decorative concrete contractors in Washington . If you encounter space limitations, you really do need a good masonry contractor to resolve the issues with other options. this leads us to our next step.

The 2nd step is hire a knowledgeable masonry contractor in Washington . Do a little research before you start getting pricing. Most good masonry contractors will be able to talk concrete chemistry and technology with you. Yes, I said technology. In the last 10 years there have been some really cool advances in concrete additives and mixes. These advances have provided solutions for the problems and limitations of old. A true patio or masonry professional will be able to talk shop with you, it’s his livelihood. A contractor who can’t do this or doesn’t seem comfortable is more than likely a novice at best. This should be the other red flag that goes up. Basically, Concrete slabs and mortar are like a cake mix. Correctly mixing the ingredients and correctly letting the slab or masonry product cure, are the factors that determine a good solid installation. Again, Talk with your contractor and Make sure he’s knowledgeable about the chemistry, additives and curing process of concrete & masonry. If he is this will ensure the likelihood of a great patio. 3rd step and last but definitely not least, Check references, check reviews and ask to see work they’ve done. Really check this stuff out and try to look at at least 1 job they have done. Ask point blank if the previous client is related to the contractor. Any resistance or confusion in this process would be red flag number

3.So, in order from 1 to 3. All masonry installations need a concrete footing. Make sure your patio contractor is knowledgeable about masonry chemistry, additives and enhancing solutions. Check references, reviews and stay away from the dirt cheap deals of a lifetime from any concrete contractor in Washington .If you get even 1 red flag, get another contractor. There are enough guys out there that do know what they’re doing.

Why Choose Concrete Construction

A concrete contractor is a specifically trained and experienced individual or team that is able to manage concrete in its various stages from an unmixed combination to the hard finished product that is produced. A qualified Concrete Contractor can design intricate plans with expert industry knowledge and experience, allowing homeowners to create their own perfect custom products for renovations in their own homes today.The contractor will oversee delivery and ensure the concrete is poured correctly. The product will then need to be worked with by an expert to produce a leveled and smooth surface that will be able to cure properly. Ensuring this process is completed accurately is one of the key procedures that need to be handled carefully and diligently by the professional involved.All great contractors can custom design features for their clients using their knowledge, skill and different techniques to ensure the best possible results with excellent customer satisfaction. Uniquely designed plans will be functional and structurally sound with patterns or color added to suit a customer's project idea. An experienced contractor like many of the large companies in the industry will be able to give a customer a helpful insight into their job progress and what to expect in the outcome of the finished project through their many years' experience and the quality of previous work completed. They know how to stain and add creative textures and colors to enhance each project for every customer.Concrete specialists can complete any task quickly and efficiently using their expertise and attention to detail. Using specialist tools to fill the entire area requested whether it is a large business complex or small residential home, whilst continuing to deliver the highest quality service and application to the client.Homeowners can enjoy planning and creating their own ideas for driveways, patios, decorative items, buildings and many other constructional projects around the home that a contractor will help ensure the most ideal plan for both parties. Customers will be quoted a reasonable pricing frame with minimal production time which will all be organized for the most efficient and effective method available.Hiring a professional to take care of all structural additions to any home or commercial building is vital to achieving good results. The complexity of the project and the understanding of the many techniques involved are important to ensure problems and safety issues do not arise. With all the specialist equipment available to handle all small and large jobs; specialists with years of valuable experience can be located in every area of the country. Delivering the best options, quality and pricing to suit everyone's needs; a professionally trained Concrete Contractor will be able to provide the highest quality completed projects with top structural standards and ongoing customer support during and after the work is finished. A concrete contractor will ensure the expectations of a client are met at all times throughout the process of any construction with the most effective, reliable and reputable service available in the market today.

Concrete Construction Projects Covered Within Contracting Companies

A concrete contractor is a specifically trained and experienced individual or team that is able to manage concrete in its various stages from an unmixed combination to the hard finished product that is produced. A qualified Concrete Contractor can design intricate plans with expert industry knowledge and experience, allowing homeowners to create their own perfect custom products for renovations in their own homes today.The contractor will oversee delivery and ensure the concrete is poured correctly. The product will then need to be worked with by an expert to produce a leveled and smooth surface that will be able to cure properly. Ensuring this process is completed accurately is one of the key procedures that need to be handled carefully and diligently by the professional involved.All great contractors can custom design features for their clients using their knowledge, skill and different techniques to ensure the best possible results with excellent customer satisfaction. Uniquely designed plans will be functional and structurally sound with patterns or color added to suit a customer's project idea. An experienced contractor like many of the large companies in the industry will be able to give a customer a helpful insight into their job progress and what to expect in the outcome of the finished project through their many years' experience and the quality of previous work completed. They know how to stain and add creative textures and colors to enhance each project for every customer.Concrete specialists can complete any task quickly and efficiently using their expertise and attention to detail. Using specialist tools to fill the entire area requested whether it is a large business complex or small residential home, whilst continuing to deliver the highest quality service and application to the client.Homeowners can enjoy planning and creating their own ideas for driveways, patios, decorative items, buildings and many other constructional projects around the home that a contractor will help ensure the most ideal plan for both parties. Customers will be quoted a reasonable pricing frame with minimal production time which will all be organized for the most efficient and effective method available.Hiring a professional to take care of all structural additions to any home or commercial building is vital to achieving good results. The complexity of the project and the understanding of the many techniques involved are important to ensure problems and safety issues do not arise. With all the specialist equipment available to handle all small and large jobs; specialists with years of valuable experience can be located in every area of the country. Delivering the best options, quality and pricing to suit everyone's needs; a professionally trained Concrete Contractor will be able to provide the highest quality completed projects with top structural standards and ongoing customer support during and after the work is finished. A concrete contractor will ensure the expectations of a client are met at all times throughout the process of any construction with the most effective, reliable and reputable service available in the market today.

Washington patio concrete contractors

Kent top concrete contractors

How to Find a Good Patio Contractor

Have you decided you want a flagstone, limestone or concrete patio for your Washington home. Wondering how to get it done and who you should use? Well, I’m going to tell you how. I’m going to give you a step by step process stating the 3 red flags that signal a bad or uneducated [tag] contractor. These 3 things will ensure you get it done the right way, by the right ready mix concrete delivery and pumping contractor in Washington .

Steps To Finding The Right Concrete Contractor in Washington

First step, first things first. Every Stone Installation Needs A Concrete Footing which might also be called a concrete foundation . This is not opinion but fact. If you want it done right and want it to withstand the test of time, this is the way it’s done, no exceptions. A red flag should go up when any contractor is offering bypassing a concrete foundation as a cost saving option. Unfortunately 85% of the ready mix concrete delivery and pumping contractors out there will tell you they can lay the stone right on top of compacted granite or base material. This type of contractor is exactly who you want to avoid. While what they are recommending to you gives the appearance of a patio, it won’t withstand the climate, erosion and soil movement beneath the patio in Washington .

BEWARE OF CONCRETE CONTRACTOR SCAMS

You might get a few crackless years at best, until it begins to fall apart. This method is the most recommended scam or shortcut of trying to lower pricing and still get the job. Notice the price came down because the concrete footing was removed from the job cost. This option of ” no concrete necessary” is most often offered to those with strict financial limitations. The contractors offering this solution don’t care about your patio or home, they just want your money.With no concrete foundation you get a type of patio, but it’s really just a veneer laid on the ground.

How much concrete do i need?

A concrete patio or sidewalk slab or footing should be a minimum of 4 inches thick. This is sometimes reduced to around 3 1/2 inches due to preexisting structural limitations for ready mix concrete delivery and pumping in Washington . If you encounter space limitations, you really do need a good masonry contractor to resolve the issues with other options. this leads us to our next step.

The 2nd step is hire a knowledgeable masonry contractor in Washington . Do a little research before you start getting pricing. Most good masonry contractors will be able to talk concrete chemistry and technology with you. Yes, I said technology. In the last 10 years there have been some really cool advances in concrete additives and mixes. These advances have provided solutions for the problems and limitations of old. A true patio or masonry professional will be able to talk shop with you, it’s his livelihood. A contractor who can’t do this or doesn’t seem comfortable is more than likely a novice at best. This should be the other red flag that goes up. Basically, Concrete slabs and mortar are like a cake mix. Correctly mixing the ingredients and correctly letting the slab or masonry product cure, are the factors that determine a good solid installation. Again, Talk with your contractor and Make sure he’s knowledgeable about the chemistry, additives and curing process of concrete & masonry. If he is this will ensure the likelihood of a great patio. 3rd step and last but definitely not least, Check references, check reviews and ask to see work they’ve done. Really check this stuff out and try to look at at least 1 job they have done. Ask point blank if the previous client is related to the contractor. Any resistance or confusion in this process would be red flag number

3.So, in order from 1 to 3. All masonry installations need a concrete footing. Make sure your patio contractor is knowledgeable about masonry chemistry, additives and enhancing solutions. Check references, reviews and stay away from the dirt cheap deals of a lifetime from any concrete contractor in Washington .If you get even 1 red flag, get another contractor. There are enough guys out there that do know what they’re doing.

Transform a Concrete Patio

Before you run right out and hire a concrete contractor there are a few things that you will want to know. One important thing to take into consideration is whether or not any excavation has to be done as part of your overall project. What eppears at first glance to be just a bank or large mound of dirt that has to be removed can add considerable cost to a project, particularly if there is rock or solid "hard pan" that has to be removed.

Ask any bidders to give you a couple of references that you can contact and drive by to look at their work and if they won't tell you where even a sidewalk or a driveway is that they have done is then you will know that you have a problem. This is because, the fact is that every reliable and competent concrete contractor has completed jobs throughout their community that you should easily be able to drive by and have a look at.

How to Form and Pour a Concrete Patio

The type of concrete that you order can be the difference between having a successful project or ending up with something that you will be tearing out in the future. If you're building a concrete patio, and it's going to be built In expansive soil, you might think about using a stronger concrete mix.The concrete strength will usually be determined by the amount of cement that will be used, water, sand and rock. The size of the rock and the type of cement will also play an important role in the strength of the concrete. A typical concrete strength that can be used for almost any project, will be around 2500 psi and we need to pay attention to these numbers as they get larger. The mixtures strength usually goes in 500 PSI increments and these increments are usually increased by adding more cement or larger rock, for each cubic yards of concrete.In other words, a 2500 PSI standard concrete mix usually has 5 - 90 pounds sacks of cement, where a 3500 PSI mix, wIll have 6 - 90 pounds sacks of cement in it. This will also depend on the rock size that will be used, to create the specific concrete mix.The size of the rock, will also help in determining, how strong the concrete will actually be. Let me give you an example: the smaller the rock, the more cement that will be required to create the same amount of structural strength, per cubic yard.With all that said, if you're just pouring a sidewalk or a driveway, you can contact your local concrete supplying company for a recommendation. I have been doing this for years and they haven't let me down yet. Usually the concrete companies have plenty of experience and know exactly what kind of concrete mixture you need for your area and project. If your neighbors have large cracks in their concrete driveway, you might want to hire a professional, to get some advice. Large cracks might mean there are problems with your soil and will require additional construction methods.

Washington patio concrete contractors

Kent ready mix concrete delivery and pumping

How to Find a Good Patio Contractor

Have you decided you want a flagstone, limestone or concrete patio for your Washington home. Wondering how to get it done and who you should use? Well, I’m going to tell you how. I’m going to give you a step by step process stating the 3 red flags that signal a bad or uneducated [tag] contractor. These 3 things will ensure you get it done the right way, by the right biggest concrete companies contractor in Washington .

Steps To Finding The Right Concrete Contractor in Washington

First step, first things first. Every Stone Installation Needs A Concrete Footing which might also be called a concrete foundation . This is not opinion but fact. If you want it done right and want it to withstand the test of time, this is the way it’s done, no exceptions. A red flag should go up when any contractor is offering bypassing a concrete foundation as a cost saving option. Unfortunately 85% of the biggest concrete companies contractors out there will tell you they can lay the stone right on top of compacted granite or base material. This type of contractor is exactly who you want to avoid. While what they are recommending to you gives the appearance of a patio, it won’t withstand the climate, erosion and soil movement beneath the patio in Washington .

BEWARE OF CONCRETE CONTRACTOR SCAMS

You might get a few crackless years at best, until it begins to fall apart. This method is the most recommended scam or shortcut of trying to lower pricing and still get the job. Notice the price came down because the concrete footing was removed from the job cost. This option of ” no concrete necessary” is most often offered to those with strict financial limitations. The contractors offering this solution don’t care about your patio or home, they just want your money.With no concrete foundation you get a type of patio, but it’s really just a veneer laid on the ground.

How much concrete do i need?

A concrete patio or sidewalk slab or footing should be a minimum of 4 inches thick. This is sometimes reduced to around 3 1/2 inches due to preexisting structural limitations for biggest concrete companies in Washington . If you encounter space limitations, you really do need a good masonry contractor to resolve the issues with other options. this leads us to our next step.

The 2nd step is hire a knowledgeable masonry contractor in Washington . Do a little research before you start getting pricing. Most good masonry contractors will be able to talk concrete chemistry and technology with you. Yes, I said technology. In the last 10 years there have been some really cool advances in concrete additives and mixes. These advances have provided solutions for the problems and limitations of old. A true patio or masonry professional will be able to talk shop with you, it’s his livelihood. A contractor who can’t do this or doesn’t seem comfortable is more than likely a novice at best. This should be the other red flag that goes up. Basically, Concrete slabs and mortar are like a cake mix. Correctly mixing the ingredients and correctly letting the slab or masonry product cure, are the factors that determine a good solid installation. Again, Talk with your contractor and Make sure he’s knowledgeable about the chemistry, additives and curing process of concrete & masonry. If he is this will ensure the likelihood of a great patio. 3rd step and last but definitely not least, Check references, check reviews and ask to see work they’ve done. Really check this stuff out and try to look at at least 1 job they have done. Ask point blank if the previous client is related to the contractor. Any resistance or confusion in this process would be red flag number

3.So, in order from 1 to 3. All masonry installations need a concrete footing. Make sure your patio contractor is knowledgeable about masonry chemistry, additives and enhancing solutions. Check references, reviews and stay away from the dirt cheap deals of a lifetime from any concrete contractor in Washington .If you get even 1 red flag, get another contractor. There are enough guys out there that do know what they’re doing.

What is Stamped Concrete?

Have you decided you want a flagstone, limestone or concrete patio. Wondering how to get it done and who you should use? Well, I'm going to tell you how. I'm going to give you a step by step process stating the 3 red flags that signal a bad or uneducated contractor. These 3 things will ensure you get it done the right way, by the right contractor.First step, first things first. Every Stone Installation Needs A Concrete Footing. This is not opinion but fact. If you want it done right and want it to withstand the test of time, this is the way it's done, no exceptions. A red flag should go up when any contractor is offering bypassing a concrete foundation as a cost saving option. Unfortunately 85% of the contractors out there will tell you they can lay the stone right on top of compacted granite or base material. This type of contractor is exactly who you want to avoid. While what they are recommending to you gives the appearance of a patio, it won't withstand the climate,erosion and soil movement beneath the patio. You might get a few crackless years at best, until it begins to fall apart. This method is the most recommended scam or shortcut of trying to lower pricing and still get the job. Notice the price came down because the concrete footing was removed from the job cost. This option of " no concrete necessary" is most often offered to those with strict financial limitations. The contractors offering this solution don't care about your patio or home, they just want your money.With no concrete footing you get a type of patio, but it's really just a veneer laid on the ground. A concrete patio or sidewalk slab or footing should be a minimum of 4 inches thick. This is sometimes reduced to around 3 1/2 inches due to preexisting structural limitations. If you encounter space limitations, you really do need a good masonry contractor to resolve the issues with other options. this leads us to our next step.The 2nd step is hire a knowledgeable masonry contractor. Do a little research before you start getting pricing. Most good masonry contractors will be able to talk concrete chemistry and technology with you. Yes, I said technology. In the last 10 years there have been some really cool advances in concrete additives and mixes. These advances have provided solutions for the problems and limitations of old. A true patio or masonry professional will be able to talk shop with you, it's his livelihood. A contractor who can't do this or doesn't seem comfortable is more than likely a novice at best. This should be the other red flag that goes up. Basically, Concrete slabs and mortar are like a cake mix. Correctly mixing the ingredients and correctly letting the slab or masonry product cure, are the factors that determine a good solid installation. Again, Talk with your contractor and Make sure he's knowledgeable about the chemistry, additives and curing process of concrete & masonry. If he is this will ensure the likelihood of a great patio. 3rd step and last but definitely not least, Check references, check reviews and ask to see work they've done. Really check this stuff out and try to look at at least 1 job they have done. Ask point blank if the previous client is related to the contractor. Any resistance or confusion in this process would be red flag number 3.So, in order from 1 to 3. All masonry installations need a concrete footing. Make sure your patio contractor is knowledgeable about masonry chemistry, additives and enhancing solutions. Check references, reviews and stay away from the dirt cheap deals of a lifetime.If you get even 1 red flag, get another contractor. There are enough guys out there that do know what they're doing.

What Kind of Concrete Do I Order? Specific Concrete Mixes

For various home improvement projects, especially those that involve using concrete, most homeowners get the services of concrete contractors, as they are more knowledgeable in the process of such home improvements. However, given that there is quite a number of contractors who offer their services, finding the right contractor can be a bit of a challenge. Fortunately, doing an adequate amount of research can make the search a lot easier as you can be armed with the information that you need to help you pick the best contractor for your building needs. This research involves employing the same strategies used in canvassing for services from a number of companies that offer them.

Getting the right concrete contractor can be a challenge given that there are a large number of contractors that provide their services, especially on the Internet. Given this, there are other steps you could to take, which includes asking for referrals from family and friends, to help you search for the that right concrete contractor for your building needs.

Washington patio concrete contractors