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How To Seal And Waterproofing An Exterior Concrete Wall?

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    Your house is susceptible to serious damage from exposure to moisture over time. Foundations, windows and doors, masonry and cement, siding, and roofs are all susceptible to damage when it comes in the form of rainwater and ground seepage. Mold growth is another problem that can be caused by excessive moisture, and it is extremely frequent in basements and crawl spaces. However, it is also possible for it to take place above ground if there are leaks in the roof or gutters. The most crucial aspect of home maintenance that you can perform is to waterproof your house and prevent moisture from entering it.

    The greatest enemy to the durability of your house is water in any of its forms. Foundations, windows and doors, masonry and cement, siding, and roofs are all susceptible to damage when it comes in the form of rainwater and ground seepage. Mold growth is another problem that can be caused by too much moisture, and it is extremely frequent in crawl spaces and basements. However, it is also possible for it to take place above ground if there are leaks in the roof or gutters. The most crucial aspect of home maintenance that you can perform is to waterproof your house and prevent moisture from entering it.

    It is possible for water and moisture to penetrate the masonry and impact the inside walls of your home if the outer walls are subjected to precipitation or a high relative humidity. This implies that your walls may remain moist for an extended period of time before they dry, which may result in the formation of mould and damage that cannot be repaired. It is not a matter of IF wall damage due to water penetration will occur in humid places like Florida, but WHEN it will occur.

    What steps can you take to protect your walls from the effects of water and mould? By proceeding through the following seven procedures, outside walls can be made watertight.

    If the walls have become damp as a result of rainwater or moisture, the best option is to waterproof the exterior of the walls. Check the walls for any defects. It is essential to get rid of any other factors that may be contributing to structural moisture before beginning your search for waterproofing goods. It may be anything, from fractures in your brickwork to dampness on the inside of the wall to a burst water pipe. The possibilities are endless. After you have resolved the issue, you can proceed to take preventative action by using a waterproofer.

    Make sure that your gutters are clean. The issue with clogged gutters is not only that they may flow over the edge and down your walls, but they also retain rainwater, which is gradually absorbed by the roof's wood or fascia boards, which can lead to a number of issues, such as rotten wood, leaks, and mould. Clean your gutters. Simply cleaning your gutters twice a year can allow you to prevent all of these issues and maintain the health of your home.

    Please be sure to choose the appropriate waterproofer: Today, homeowners have access to a wide variety of waterproofing products that can assist them in protecting their homes against moisture that originates outside. The following is a list of products that you should think about purchasing:

    • concrete waterproofing coating is a cement-like compound that attaches to masonry and concrete in a permanent manner; it may be applied to any surface, including painted walls; and it can prevent water from penetrating concrete.
    • concrete sealer based on silicate, which forms a waterproof covering by reacting with the components of masonry and concrete to form a coating; this sealer can only be used on walls that have not been painted or sealed previously;
    • The fundamental distinction between waterproofing paint and acrylic wall paint is that the former offers superior water resistance than the latter in terms of its overall performance. It is of the utmost importance to select a formulation that is breathable and specifically developed to enable walls to breathe and rid themselves of moisture. It is possible to apply the product to surfaces that have already been painted.

    Utilize a plaster waterproofing additive: Plastering is a great way to improve aesthetics, make walls more solid, and protect them from the intrusion of moisture. Even though the majority of external plasters include properties that make them waterproof, you may alleviate water penetration issues and stop them from happening in the future by merely adding a waterproofing additive to the plaster.

    Your walls need to be in good condition before you can waterproof them. This is true regardless of the product you choose to use to waterproof outside walls; first, your walls need to be in good shape. This indicates that in order to repair fractures and holes, you will need to make use of a filler of sufficient quality. Before grinding the filler, ensure that it has reached its maximum level of dryness. After that, sand down any rough or uneven spots, wash the surface with water to remove any dust, and wait for the walls to dry completely before applying the waterproofer. This will ensure a strong bond between the waterproofer and the substrate.

    Apply the waterproofer: You can use a roller or a brush to apply the waterproofer. If a second coat is necessary, wait for the first one to dry completely before applying the second one in its entirety. Make sure you use a sufficient amount of the product to establish an impregnable barrier against infiltration.

    Test: It is very important to evaluate the effectiveness of the products used for waterproofing exterior walls by conducting a water-tightness test. For the purpose of this test, water should be sprayed on the surface of the wall for a couple of hours while maintaining a 30 degree angle with the nozzle. If a moisture metre indicates that there is no moisture in your home, then your house will pass the inspection. If you waterproof the external walls of your home, you will not only be able to prevent significant damage, but you will also be able to increase its worth.

    10 Steps For Waterproofing An Existing Outside Wall

    How To Seal And Waterproofing An Exterior Concrete Wall

    Utilise a plaster waterproofing additive: Plastering is a great way to improve aesthetics, make walls more solid, and protect them from the intrusion of moisture. Even though the majority of external plasters include properties that make them waterproof, you may alleviate water penetration issues and stop them from happening in the future by merely adding a waterproofing additive to the plaster.

    Your walls need to be in good condition before you can waterproof them. This is true regardless of the product you choose to use to waterproof outside walls; first, your walls need to be in good shape. This indicates that in order to repair fractures and holes, you will need to make use of a filler of sufficient quality. Before grinding the filler, ensure that it has reached its maximum level of dryness. After that, sand down any rough or uneven spots, wash the surface with water to remove any dust, and wait for the walls to dry completely before applying the waterproofer. This will ensure a strong bond between the waterproofer and the substrate.

    Apply the waterproofer: You can use a roller or a brush to apply the waterproofer. If a second coat is necessary, wait for the first one to dry completely before applying the second one in its entirety. Make sure you use a sufficient amount of the product to establish an impregnable barrier against infiltration.

    Test: It is very important to evaluate the effectiveness of the products used for waterproofing exterior walls by conducting a water-tightness test. For the purpose of this test, water should be sprayed on the surface of the wall for a couple of hours while maintaining a 30 degree angle with the nozzle. If a moisture metre indicates that there is no moisture in your home, then your house will pass the inspection. If you waterproof the external walls of your home, you will not only be able to prevent significant damage, but you will also be able to increase its worth.

    • The exterior face of the wall was exposed, and the soil and fill that had been used to initially back-fill against it required to be removed. It is necessary to remove it all the way down to the footer, along with any old field tile or drainage pipe that was used.
    • Clean the wall of any filth and debris. The caked-on dirt on the house needs to be removed before moving on to the next couple of steps. This will ensure that the steps can be completed successfully. First, the wall should be swept or brushed, and then it should be finished off with a power washer.
    • After the wall has been thoroughly cleaned, use hydraulic cement to fill in any holes or cracks that you see. Use hydraulic cement to fill in any significant cracks or holes in the wall that you find. Before applying this product, ensure that you have followed the guidelines for the cement and that any loose stones or cement have been removed.
    • After the wall has had enough time to dry, use a paintbrush to apply a cement-based waterproofing sealer to the exterior wall. This type of paint-sealer is designed specifically for use on exterior walls. It is necessary that this be dried up completely.
    • Use a product that is based on tar to pitch the wall. Use a pitch that is based on tar and apply it to the wall using a trowel.
    • Add a Thick Heavy Duty Membrane 6 Mil or Above - Roll out a thick plastic Heavy Duty plastic or rubber Membrane and lay it up on the wall with some help on the pitch over the footer and apron it outwards away from the wall. Add a Heavy Duty Membrane 6 Mil or Above - Add a Heavy Duty Membrane 6 Mil or Above - Add a Heavy Duty Membrane 6 Mil or Above - Add
    • Put in a few inches of gravel base that is 3/4 inches thick in the trench that is below the footer so that the drainage pipe has something to lay on. To properly support the plastic drain pipe with perforations, the trench must be lined with a base of gravel.
    • Place drainage pipe with holes facing down and cover it with gravel. Position it so that it is at or near the same level as the footer. After that, you should backfill the pipe with gravel and cover it with at least three to four inches of cover material.
    • A fabric barrier should be used to cover the perforated plastic pipe. This is a necessary step in order to prevent debris from entering the pipe and causing the system to become clogged.
    • Backfilling the Trench with Soil You need to backfill the trench with dirt and build up the top of the dirt so that it is high enough to allow for settling. Make an effort to slant the earth away from the house in order to provide space for runoff. Make the necessary adjustments to the rain gutters so that water flowing off the roof will not enter the house.

    Waterproofing Exterior Wall Products

    The price of the project would be determined by a few other choices, such as whether or not to use a trencher or a bobcat. This could add an additional one hundred to two hundred dollars to your daily bill, in addition to the cost of delivery. It would be challenging to operate trenching or mini-excavation equipment, such as a Bobcat or a trencher, because of the close closeness of the trench to the wall.

    We discovered that the traditional method was the most effective one, particularly if you are not accustomed to operating this kind of machinery. Enter the area and start digging by hand. After that, around one month later, when the earth had become more stable, I rented a small Bobcat and landscaped the trench against the wall by adding new topsoil and a few bushes.

    At this point, you would hardly be able to tell that anything significant took place there. The cost of this job without the Excavator or the BobCat was approximately one thousand dollars, but the exact amount would depend on the dimensions of the wall that needed to be waterproofed. If you plan to dig the hole by hand and are already in possession of shovels, post hole diggers, and wheel barrels, then the following supplies will be required:

    • The cost of waterproofing paint sealer such as Thoro-seal, which is a cement-based paint that has been on the market for years, is $50.00 for 5 gallons. There are newer items on the market that cost $250.00 for a bucket that holds 5 gallons. Products of more recent technology, such as Krystol T2, are a water block that is placed to the surface and resists hydrostatic pressure. This causes the formation of small crystals, which then fill up the spaces and pores in the concrete. It is able to repair damaged membranes and provide an additional layer of protection for years to come. In most cases, this quantity is sufficient to cover up to 300 square feet of wall space. You may either spray it on or paint it on.
    • Plastic Heavy Duty Membrane that is 6 mils or thicker can be purchased for less than fifty dollars for a 10 by 50-foot roll, which is equivalent to around five hundred square feet. You could do both of those things for increased safety.
    • 4.75 gallons of pitch made from tar. Their products are intended for use on outer walls both above and below grade, and one application covers around one hundred square feet for approximately fifty dollars. This product is designed to be applied to all types of masonry walls, including those made of concrete and cinder blocks.
    • The cost of trowels and brushes required for the application of these goods is estimated to range between fifty and seventy-five dollars. They are required in order to successfully apply the products on surfaces of this nature.
    • The use of hydraulic cement can prevent water from leaking through cracks in concrete, block, and other types of masonry surfaces. Hydraulic cement can be used either above or below grade, and it hardens in 3-5 minutes at 5500 pounds per square inch of pressure. Can repair holes in your wall the size of golf balls. It has the ability to harden and set underwater, and you'll need it to fix any holes or cracks in the surface before you paint it.
    • Gravel in bulk with a 3/4-inch particle size costs roughly $30–$40 per tonne and approximately $100 for delivery. Request that it be delivered during the week by the truck. It will be less expensive than the rate for the weekend. If you try to pick it up by yourself, not only will it take up too much of your time, but it also runs the risk of interfering with the pickup of another person.
    • With the extra sock, there is no need to add the fabric barrier to the 4 inch polypropylene drain pipe, which can be purchased for approximately $25.00 per length. Pipes of this size are typically used for drainage purposes. Be careful you utilise some sort of obstruction.
    • A pressure washer will price you approximately $100.00 per day to rent at most shops like Home Depot, or you can just buy one. There are many applications for a pressure washer. One might use it for a hundred different things than the wall. We opted to acquire a pool despite the fact that we already had one built in, and it turned out to be an excellent investment. When you factor in how much it will cost you annually to rent one, you'll realise that it's more economical to purchase your own.

    How to waterproof foundation walls from the outside

    How To Seal And Waterproofing An Exterior Concrete Wall

    We scheduled the project for a weekend in the fall when the weather was expected to be clear and dry, and we got our wish. We also came to the conclusion that the entire endeavour should have the spirit of a party. It has been my experience that good friends would put in extra effort if they are well nourished and hydrated.

    We both realised that in order to dig the trench, this job would demand a lot of back strength from everyone involved. Therefore, we chose a weekend or two days and invited as many of our friends as we could possibly fit into our home. My wife prepared an extremely large breakfast for all of us so that nobody would go hungry in the morning. We had an early start.

    We needed to get down past the footer, which was about 8 feet deep, in order to breach the wall, which measured approximately 30 feet in length. It was remarkable to us how quickly we were able to dig the trench even though we were working in shifts. It was nearly enjoyable because to the abundance of music that was playing and the food that were being served up by my wife. We had started scrubbing the wall by the time dinner rolled around.

    The meal consisted of a massive grill and a keg of beer, both of which were brought out once the job was over. By the time night fell, a few other people and I were finishing up patching and painting the wall that was entirely exposed.

    After waiting until the next morning, I was finally able to go near enough to examine everything, and the wall appeared to be in good shape. We began applying the pitch, which, as I had predicted, was quite dirty, and we threw it into the wall, creating a coat over the sealer paint that had just finished drying. A handful of us doubled up a plastic sheet and propped it up against the newly tarred wall in order to protect it from the elements.

    Following that was the layer of gravel that would serve as a bed for the perforated drain pipe. Because the wall had a natural slope and the trench sloped from deep to shallow, we did not have any difficulties when laying the pipe for the drainage system. Following that, a few more inches of gravel were added in order to cover the pipe after it had been backfilled.

    Check to see that the rain gutters on the roof are in good functioning order and have enough space for the water that runs off the roof. I prepared for the possibility by installing gutters that were both larger and wider. It would be useful. It was well worth investing a bit more effort and a few extra dollars.

    In addition to the groundwater that I was aware was entering the house, the water that was leaking from the roof could have also been a concern and contributed to some of the issues that were occuring in that part of the house.

    It is important to pay attention to any such cases. All water should be considered the adversary. Make the gutters bigger, and if at all possible, invest in the more expensive and durable vinyl variety that interlocks. Remove the downspouts from the wall and position them so that they drain away from the house. Because of this, there is a reduced chance of water pooling up against the exterior wall and increasing the likelihood that water will locate another entry point.

    After 20 Years The House is Dry

    I discovered that this method was effective, and I am now certain that waterproofing the outside of the building's existing wall was not only the best choice, but also the most cost-effective one (provided that no shortcuts were taken) and the one that will be successful in the long run. You definitely do not want to repeat this project another time ten years from now.

    After about 20 years, I can tell without hesitation that not a single drop of water enters my home from any of the areas around it that have been waterproofed. To anyone who is considering doing this yourself in order to save money, here are a handful of money-saving strategies I can share with them:

    • Make it a celebration and invite people you know who have strong backs as guests. We had a wonderful time together. It was difficult to believe that we were able to save that much money.
    • Prepare everything, including the forecast, in advance.
    • Talk to an experienced professional contractor that is familiar with the specifics and the equipment that will be required. Conversation with him not only provided me with accurate knowledge but also boosted my self-assurance.

    If the outer walls are not waterproofed, the rainwater that seeps in can generate wet walls, which are prime locations for the growth of mould and mildew. This causes deterioration to the walls and results in health issues for the people living there. If it is not possible to waterproof a basement from the inside due to the basement already being finished, your best alternative is to instal an exterior drain tile system. This will prevent water from entering the basement. The first step in this process is constructing the foundation wall. The next step is to apply a Silicone Polymers covering that is waterproof. Services Relating to the Waterproofing of the Interior

    There are a variety of reasons for this, including an increasing wetness due to a high groundwater level, gaps through which rainwater seeps inside, and seepage from nearby leaking walls in the bathroom and the kitchen. The standard methods of waterproofing that are currently in use are insufficient to combat the significant wetness that is developing as a result of these reasons. If you had access to a specialised treatment that could eliminate this wetness for good, that would be very helpful.

    Frequently Asked Questions About Exterior Concrete Wall

    When sealing basement floors and foundation walls, the best concrete sealers are the Lithi-Tek 4500 primer, followed by the Siloxa-Tek 8510 waterproofing sealer. If you are installing flooring in the basement, it is best to use a moisture vapour barrier coating like the Vapor-Tek 440.

    For the best method for sealing concrete block walls and the best cinder block water barrier, read on.

    • Apply a Coating Directly On the Bare Wall. 
    • Use a Breathable / Permeable Barrier. 
    • Use a Weather-Resistant Elastomeric Layer. 
    • Use “The Pink Stuff” 
    • Repair Cracks and Fill Voids First. 
    • Install an Air and Moisture Barrier.

    Yes, DRYLOK® can be applied to interior and exterior masonry surfaces – above or below grade.

    Install a waterproofing membrane. A heavy membrane coat, an asphalt-modified polyurethane material, can be troweled or sprayed on to seal the foundation wall against water from the outside. Elastomeric membranes are made of modified asphalt and exhibit great waterproofing characteristics.

    Although a concrete wall does get wet, water doesn't pool on it as it does on flat work, so it doesn't need sealing as much. After the concrete has been poured and cured, adding a sealer helps protect it from future damage, corrosion, and stains. Because concrete is porous, it tends to absorb water and other substances.

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