Exterior Of A House

How do you waterproof the exterior of a house?

Table of Contents
    Add a header to begin generating the table of contents

    Water is a silent home-damager. Moisture damage can occur if your home's exterior walls aren't waterproof. Damp walls breed mildew and mould, which can damage a home and cause health problems. With proper waterproofing, such damage can be avoided. You can waterproof your home's exterior with DIY products.

    Exterior waterproofing is a proactive way to ensure a dry basement. Ideally, it's done during construction. Exterior basement waterproofing can be done on poured concrete or masonry block basements. Accurate Basement can help with your basement needs.

    We have a wide range of external waterproofing services at Hitch Property Constructions.

    Simple Steps to Waterproofing Exterior Walls

    The Exterior Of A House

    Check walls for faults.

    If the exterior walls become damp due to rainwater or moisture, the best solution is to waterproof them. However, this only applies if the walls are already damp. It is essential to get rid of any other factors that may be contributing to structural dampness before beginning your search for waterproofing products. It could be anything, from cracks in your bricks to condensation 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 applying a waterproofer.

    Clean your gutters 

    The problem with clogged gutters is not only that water 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 series of problems, such as rotten wood, leaks, and mould. The problem with clogged gutters is not only that water may flow over the edge and down your walls, but it also retains rainwater. Simply cleaning your gutters twice a year will allow you to avoid all of these issues and maintain the health of your home.

    Select the right waterproofer 

    A series of waterproofing products are available today to help homeowners protect their homes from external moisture. Here are a few products you should consider:

    • concrete waterproofing coating, which is a cement-like product that adheres to concrete and masonry permanently; it can be applied to any surface, including painted walls;
    • silicate-based concrete sealer, which reacts with the ingredients in masonry and concrete to form a waterproofing coating; this sealer can only be used on unsealed/unpainted walls;
    • Waterproofing paint, which is similar to acrylic wall paint, with the main difference that it delivers better waterproofing performance. It's very important to choose a breathable formulation that is specially designed to allow walls to breathe and eliminate moisture. The product can be applied to surfaces previously painted.

    Use plaster waterproofing additive.

    Plastering improves aesthetics, strengthens walls, and prevents moisture infiltration. Most exterior plasters are waterproof, but you can prevent water infiltration by adding an admixture.

    Before waterproofing exterior walls, you must first prepare them. To repair cracks and holes, use a good-quality filler. Dry filler before grinding. Sand rough, uneven areas, remove dust with water, and let walls dry completely to ensure waterproofer and substrate adhesion.

    Apply the waterproofer

    When applying the waterproofer, you can do so with either a roller or a brush. 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.


    It is essential to carry out a water-tightness test in order to evaluate the efficiency of the products utilised for waterproofing the exterior walls of a building. 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 exterior walls of your home, you will not only be able to prevent serious damage, but you will also be able to increase its value.

    Why Would Exterior Basement Waterproofing Be Needed?

    Water from the soil seeps through cracks and porous basement walls, causing wet basements. Concrete walls can have spots that let water in due to poor pouring, and masonry block walls can crack along mortar joints.

    Soil type also affects basement water. The amount of soil expansion depends on its type. Milwaukee's clay soil absorbs water, expands, and drains poorly. All this expansion and swelling puts pressure on the foundation, forcing water through small openings.

    What Is Exterior Basement Waterproofing?

    The exterior of the basement can be waterproofed, which can solve all of these problems. The first step in the process entails excavating the soil away from the exterior wall of the basement, followed by the installation of the appropriate moisture barrier, the filling of the surrounding area with gravel, and the creation of a footer draining system. A sump pump may or may not be necessary.

    There may be some preparation work that needs to be done on the basement wall, and there are many different types of moisture barriers. The certified professionals at Accurate Basement will be able to tell you exactly which type of moisture barrier will work best for your basement. The type of soil that we have in this area makes the gravel fill an especially important component.

    What Are the Benefits of Exterior Basement Waterproofing?

    Exterior waterproofing has many benefits. It prevents basement water from entering, not manages it. It drains water away from your foundation. Gravel reduces hydrostatic pressure. It creates a dry, comfortable basement. Having an exterior basement waterproofing system eliminates seepage, wet spots, and musty odours, making your basement liveable. It boosts your home's value.

    Exterior Basement Waterproofing

    Gutters and downspouts are an essential component of your overall basement waterproofing plan.

    Make sure gutters are clean.

    The amount of time that has passed since you last cleaned them is directly proportional to the density of the vegetation that surrounds your home.

    When we first moved into our home, there were two maple trees that were well over a century old and towered directly over the structure. I would have to visit that location at least twice per year in order to give it a THOROUGH cleaning.

    When compared to our previous home, the one we are in now is located in a more recent neighbourhood. There is not a single tree on the street that comes anywhere near our roofline. In any case, you should climb up onto the roof at least once a year in order to give them a speedy cleaning and ensure that all debris, including the loose asphalt sediment that erodes from your shingles, has been removed.

    If you have access to a power washer, by all means use it to make short work of the task. In any other case, all you'll need is a ladder and a garden shovel to get the job done. When using ladders, proper safety procedures should never be forgotten.

    Make sure gutters are properly pitched. 

    If your gutters are clogged or the pitch is incorrect, water will pool near the downspouts or flow away from them, causing the water to spill over the edges of the roof instead of flowing in the direction that you want it to.

    If it is falling over the edge of your gutters, it is almost as if you do not have gutters at all. Water will continue to fall at the base of your house, near your foundation, which is exactly where the gutters are trying to divert it away from in an effort to prevent damage. This water will eventually end up in your basement rather than the sewer because that is where it is most likely to collect.

    If you have any reason to believe that the pitch of your gutters is incorrect or that they are not the appropriate size for your roof, you should go outside during the next time it rains heavily and observe how well your gutters are working.

    Alternately, you could get up there with your garden hose and spray away; if significant accumulation occurs when using a hose, it's likely that it's not keeping up with even moderate rain.

    Looking for external waterproofing Melbourne? Check out Hitch Property Constructions.

    Downspouts & Downspout extensions 

    Now that your gutters are working effectively, you shouldn't slack off on the downspouts maintenance. There is not a lot of downspout, but each downspout ought to have an extension attached to it.

    I've seen them executed in a variety of different ways. The most common types are pieces of extra downspout, flexible tubing (which typically comes in brown or green), or automatic versions that roll out when it rains and retract when it's not pouring.

    In my house, I have the version that has flexible tubing, but the most important thing is to position it so that it dispenses water 4-6 feet away from the house and away from the foundation.

    Landscape Grading

    The pitch of everything surrounding your house is another key component to successful exterior basement waterproofing.


    It doesn't seem complicated, but in reality, it is. People do not consider looking at it or fixing it in any way. The key to success here is to make sure that the grading around your foundation slopes away from your house in an increasingly steep fashion.

    When you add new mulch each year, be sure to add more of it towards your house and less of it away from it. This will create a gentle slope that will allow water to flow away from your property. It is not necessary for it to be spectacular; just enough to allow the water to flow naturally will do.


    Concrete and asphalt have a propensity to settle over time, and this movement is typically in the wrong direction. This creates an angle that is directed towards your foundation.

    There are a few solutions to this problem, some of which are more expensive than others. When compared to concrete, asphalt typically requires less effort to repair. If you are having problems with concrete, you might want to look into mud-jacking. Although I have no personal experience with that method, I've heard that it's a good alternative to totally removing and replacing sunken concrete.

    Benefits of Exterior Foundation Waterproofing

    Protect Your Family Members With Medical Conditions

    Your house is a place where you can provide your loved ones with a secure haven to which they can refer as their own. The issue is that people often find that being at home gives them even more problems to deal with.

    The presence of dampness and moisture can make some medical conditions, particularly respiratory conditions, significantly worse.

    Because mould spores are dangerous and should be avoided at all costs, you should do everything you can to keep your home mold-free.

    A properly waterproofed exterior foundation can prevent mould from spreading even before it has a chance to, which ensures that your family will continue to enjoy good health.

    Waterproofing Covers All Areas Where Leaks Could Come In

    Regarding the topic of waterproofing your house, do you believe that you have taken care of everything that needs to be done? If you do not have the necessary expertise, there is a good chance that you will overlook a spot, and water may still be getting in.

    If you hire a professional to waterproof your home, they will locate and seal off any and all points of entry that could be exploited by intruders.

    Areas of your home's exterior that local experts will waterproof include:

    • Your chimney and roof
    • Windows
    • Siding
    • Decks and more.

    You'll be amazed at what needs waterproofing in your home.

    Foundation Waterproofing Protects Your Belongings

    Mold and mildew are the most damaging elements that can affect your belongings.

    You have an obligation to ensure that you are making every effort to protect their wellbeing. If it makes its way into your house, it can spread along the walls much more quickly than you might expect.

    If you lean anything against these walls, you should be prepared for it to sustain damage almost immediately. It is a much more serious problem if the items in question are kept in a damp room, such as a basement. It is possible that you will discover that you have lost many of your possessions to mould before you even realise it.

    Waterproofing the exterior foundation of your home will prevent water from seeping into your home and encouraging mould growth, which will keep your belongings safe.

    Protect The Aesthetic Of Your Home

    Every homeowner has the same goal in mind: they want their house to look nice.

    It is possible that you are required to keep it looking up to code at all times as well, but this will depend on the neighbourhood. Even if you have a lovely paint job on the exterior of your home, water can cause damage to it very quickly.

    Paint that is flaking off is not attractive, so you should try to avoid it. Waterproofing the exterior of your home should be done before painting it, regardless of whether you do it yourself or hire someone else to do it.

    This will prevent water from causing damage to the paintwork and will keep the paint in good condition for a longer period of time. Ask your local painter if they can also provide the service of waterproofing your home before they paint it because many painters in the area offer this service.

    Exterior Foundation Waterproofing Stops Water In Its Tracks

    It's true that not all methods of water damage prevention are up to the challenge.

    The installation of damp proofing, for instance, can prevent water from penetrating your home and causing damage. However, this does not prevent it from entering your home through the exterior walls.

    This will, in due course, result in structural issues as well as additional problems for you to resolve. It might look like a simpler or less expensive option, but it might not be the best way to manage the water in your home.

    If you waterproof your home's exterior foundation, water won't be able to enter your home at all, including the exterior, and therefore it won't be able to cause any damage at all.

    It is the most effective strategy for defending your house.

    It Raises The Value Of Your Home

    A red flag should be raised for any prospective buyers when the building in question has problems with dampness or moisture inside.

    It demonstrates to them that there are significant issues with the home and that it is going to take them a significant amount of time or money in the future to fix those issues.

    It will turn away a significant number of potential buyers and even bring down the price of your home.

    On the other hand, if you use exterior waterproofing on your foundation, it demonstrates to potential buyers that you have maintained the property in a responsible manner.

    Because you were able to stop the water in its tracks, your house is no longer at risk of flooding and is now safe for everyone.

    If you use this method to waterproof your home, you will notice an increase in the value of your home, so giving it some thought if you are considering selling it is something you should do.

    Does the Outside of Your House Need to Be Waterproofed? Get in Touch With the Home Exterior Experts You Have Now!

    Exterior Foundation Waterproofing Is A Long Lasting Solution

    The problem with many different approaches to waterproofing is that they are only temporary fixes to the problem.

    You may believe that you have stopped the water from entering your home, but the water has actually found a way back inside.

    On the other hand, waterproofing the exterior of the foundation is a solution that is significantly more long-lasting. Because it creates a barrier that will prevent any moisture from entering your home, you can put your feet up, relax, and enjoy the results of your efforts.

    It has even been reported that in some cases it can last a person's entire lifetime!

    Protect Your Home's Structure

    You might not realise the extent of the damage that dampness causes.

    It can make your home look unsightly, it can harm your health, and it can destroy your belongings. You are unaware of the fact that this is causing structural damage to the house.

    Consider, for instance, the roof over your head.

    If the water is allowed to sit there for an extended period of time, it can cause the roof beams to rot. This will eventually cause the entire roof to become damaged.

    If you wait long enough, you'll have to replace the whole roof because the damage has gotten so bad. You won't have to worry about any of this taking place at all if you remain vigilant and select waterproofing for the exterior foundation.

    Increase Space In Your Home

    If you have taken measures to protect your home from dampness, then there won't be any areas in your home that you won't be able to use.

    Consider the basement as an illustration. You can rest assured that it won't become wet now that you've protected it. You could turn it into a space dedicated to your hobby, or you could use it as an additional room.

    You won't ever have to be concerned about water entering and destroying that area of the house.

    At Hitch Property Constructions, we offer Melbourne external waterproofing services.

    How to Waterproof an Exterior Wall

    Step 1

    You can use paint stripper or hire a professional to remove the finish from the concrete portion of your exterior wall. Either way, strip the finish. If you want the waterproofing product to be able to penetrate the wall and provide protection for it, you will need to expose the bare concrete.

    Step 2

    The wall must be washed with the power washer and a mild detergent in order to get rid of any chemical residue that may have been left over from the stripping process.

    Step 3

    Repair any cracks in the concrete that are larger than the width at which the waterproofing product you are using will effectively seal them. Using a trowel and some concrete filler, fill in the cracks in the wall. Make sure to level the filler so that it is level with the rest of the wall. Before moving on to the next step, make sure the filler has had ample time to dry completely.

    Step 4

    If you want the wall to have a rough texture when you touch it, you can sandblast it or use the wire hand brush. It is necessary for the product to have a rough texture in order for it to "grip" the surface.

    Step 5

    In order to remove any debris from the wall, give it a thorough rinsing with the power washer or a hose. During the process of applying the waterproof sealant, it is important to ensure that the wall is kept damp as directed by the manufacturer.

    Step 6

    You can use either a brush or a roller to apply the waterproofing sealant to the wall. Be sure to use a sufficient amount of the product so that the wall, despite its rough texture, is completely covered. If the instructions call for more than one coat, you should wait until the wall is dry before applying the second coat.

    As you can see, there are a wide variety of factors to consider when deciding whether or not to waterproof the exterior foundation of your home. It has a long-lasting effect, is very effective, and will have a positive influence on the health and well-being of your family.

    FAQs About Waterproofing

    Install a waterproofing membrane. A heavy coat of the membrane, 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.

    If your home's exterior walls are not waterproofed, you can face damage from invading moisture. Damp walls are excellent breeding grounds for mildew and mold, which can damage the home and lead to health problems for occupants. With proper waterproofing of a home's exterior walls, however, such damage can be avoided.

    What are waterproof coatings? Waterproof coatings cover the masonry of your building with a waterproof substance, stopping water from getting inside and wrecking havoc. There are also water-repellent coatings, Old House Journal explained, that are hydrophobic toward droplets of water but let vapor inside.

    The truth is, many things we normally consider to be waterproof actually have a measurable level of permeability. Plastic, glass, even solid steel are all permeable to a small degree. From a purely scientific point of view, it is correct to say that nothing is absolutely waterproof.

    Clean all concrete surfaces so they are free from all forms of scale, laitance, dust, mold, form oils, wax and curing agents as well as any material that can impact the bonding of the waterproofing membrane to the substrate.

    Scroll to Top