How do you waterproof a basement on the outside?

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    A homeowner may have already taken a number of steps to ensure that the interior of their basement is watertight, but that is no reason to neglect the exterior. If you want to be sure that your basement is totally watertight, you need to look at every angle, from the foundation to the walls.

    In order to establish a drainage system and effectively waterproof the outer foundation and the basement, it is necessary to excavate around the area where the problem is most likely to occur, around the perimeter, or along more than one length. Before proceeding with the drain installation, any outside cracks must be carefully sealed.

    The person you've hired needs to apply a substance to the walls of the building that will make them watertight. They may also use a dimple board. A plastic sheet with dimples in it can shield the waterproofing material from damage and force sediment to flow downward. Dimple boards are the proper name for these sheets. Another option is to spray a water-resistant membrane onto the base of the structure. Despite the membrane's adaptability, it must be kept safe from damage at all times with a dimple board.

    There are many different types of drainage systems, so once you've fixed any problems like cracks or instability, you may move on to installing one. Most drainage systems are meant to be built on the inside of a house, however there are a few simple drainage systems that are meant to be installed on the outside.

    Internal injection of expanding polyurethane, which seals the crack to the exterior earth and remains flexible after curing to prevent re-cracking due to small foundation movement, is another permanent method of repairing seeping wall fissures. In the same way, leaking wall fractures can be fixed from the outside of the house.

    However, there are methods for waterproofing a basement that must be performed outside the structure. These methods are the best and only approach to stop seepage from particular locations.

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

    Comparing Damp-Proofing With Basement Waterproofing

    Is there a difference between "damp-proofing" and "waterproofing" when discussing the outside and basement of your home?? What exactly does each of these terms mean?


    Indeed, There Are Significant Distinctions Between the Two

    Exterior damp-proofing is the practise of adding a thin layer of a liquid asphalt-based solution to your foundation in order to avoid exterior dampness. Damp proofing cannot seal foundation cracks since it does not contain rubber. The purpose of damp proofing during a home's construction phase is to achieve the bare minimum of what is required by code. A hundred feet of most foundations will set you back between between twenty and thirty bucks to cover. Foundations of homes built before 1980 are more vulnerable to moisture damage since they were not protected by damp proofing or waterproofing. Although damp proofing is effective, it cannot prevent water from eventually reaching the structure.

    As part of the exterior waterproofing procedure, any foundational fractures or defects produced by expansion and contraction are sealed. The foundation is protected from water and sealed off from the elements in this method. Part of our primary waterproofing process involves using a commercial-grade version of RCC's Hydro Guard. Two layers are applied using a specific procedure that costs between $200 and $250 and can cover 20 feet. RCC employs a commercial-grade waterproofing compound instead of damp-proofing, allowing them to offer a 50-year guarantee against water seepage and moisture.

    Careful consideration should be given to the products used to complete the waterproofing of your home. In order to stay competitive, many contractors and waterproofers will say they will waterproof, but in actuality they will employ damp-proofing solutions.

    How Water Enters

    Waterproofing the exterior of the building is the most effective method for preventing water from entering the basement through the upper walls. It swells and shrinks depending on the amount of moisture in the ground around your house. Due to expansion and contraction, your basement's foundation may shift or crack.

    The water could seep in through the crevices in your foundation. You should be aware that damage to your basement can occur from moisture and condensation even if you do not see any fractures in your foundation. This is because concrete is porous, therefore it can't block moisture.

    Sixty percent of all homes now need waterproofing because of the problem.

    Multiple strategies exist to ensure the exterior remains watertight. To minimise the impact on the property owner, the neighbourhood, and the environment, modern basement methods are employed. The modern basement doesn't require any large machinery for exterior waterproofing work. On the average, a building has only to be excavated about eighteen inches deep in order to be successfully waterproofed.

    Subsoil Drainage

    French drains, often called yard drains, are not limited to being built in the yard or somewhere outside of a building; they can also be installed in the basement.

    Exterior French drains do nothing more than divert water away from a house, preventing it from pooling near the foundation and putting undue pressure on it. Waterproofing professionals can quickly and easily instal yard drains.

    There will be little to no damage to your grass or plants from the installation of yard drains.

    Driveway Drains 

    Driveway drains are a special kind of drain since they are often placed in a driveway rather than elsewhere. They work like a yard drain in that they channel water away from the house and into a lower, draining region. Metal grates are standard equipment for driveway drains and keep leaves and sticks from clogging the drain and preventing water from draining. Depending on the flow of water, a driveway drain may be an effective and aesthetically beautiful approach to minimise floods and water damage to the house.

    Downspout Lines 

    Downspout lines, sometimes called downspout drains, are the pipes that lead from your home's downspout to the ground below. Swelling can occur in one or more sections of soil if water accumulates there because gutters and downspouts are overworked or insufficient for the quantity of rainfall.

    This can occur despite the presence of sufficient gutters and downspouts. Soil swelling poses a threat to a house's foundation, which could lead to structural failure. Moreover, water present either beneath or above ground may leak into the foundation through fractures, leading to flooding inside the building.

    Installing a downspout line is one of the preventative actions a homeowner can take to avoid costly foundation damage caused by water seepage. Putting up downspout lines is as easy as putting in any other type of outside waterproofing, and it won't damage your yard or landscaping too much.

    Exterior Basement Waterproofing

    There is strong evidence in favour of exterior basement waterproofing due to the location of the water. Water seeping into a basement usually comes from the ground right next to it, either directly below the foundation or all around it.

    Soil will expand to a greater or lesser extent, depending on the type of soil being used, when water is absorbed by it. The normal sandy soil of north-west Indiana, for instance, doesn't expand very much. The reason for this is that the presence of sand in the soil increases the rate at which water can drain through the soil by creating more holes between the particles.

    In contrast, the vast clay soil that characterises much of the Midwest and the Chicago area in particular. This soil type is notoriously water-retentive due to its inability to remove excess moisture. Smaller, more tightly packed particles characterise clay soil. So, when we add water to clay soil, it grows as much as every other soil type.

    This swelling and expansion, taken as a whole, puts stress on the substructure. Seepage in the basement can occur if water is able to escape through a crack, porous area, or utility opening that has not been properly sealed.

    A basement's lateral pressure from water-logged soil necessitates an outside technique of waterproofing to prevent leakage. Waterproofing is only one option for fixing this issue; other outside repairs focused on water management and diverting water away from the building's foundation may also help.

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

    What, Then, Is the Procedure for External Basement Waterproofing?

    Exterior Waterproofing Membrane  

    At times, a basement wall may develop a leak. The most common type of wall used in modern residential building is poured concrete, which can have porous patches in the concrete due to construction. Insufficient vibration of the poured wall to remove trapped air may have contributed to these porous areas, or the concrete may have been improperly mixed, allowing aggregate or dry cement to form pockets. There are some holes in the structure that could allow water to seep into the basement.

    Seepage in masonry walls typically results from either a crack in the wall itself or the deterioration of the mortar joints between the individual masonry pieces. Minor foundation movement can cause mortar joints to break, and repetitive movement or poor installation can cause mortar to deteriorate over time. The mortar joints in a standard wall can stretch for hundreds of linear feet, creating a vast area vulnerable to seepage.

    It is possible for water to slowly infiltrate through masonry walls due to the porosity of the individual masonry elements, most notably the concrete blocks and bricks. Concrete block is especially vulnerable to water damage because water can collect in the block's cavities and then seep through the block's porous inner surface. The outside layer of the block is permeable, allowing water to seep within.

    Ultimately, water can infiltrate over the top edge of a foundation wall of any design. This is especially likely if the lawn outside the house has a negative gradient (that is, it slopes towards the house) or if the deck, patio, or other adjacent structure was constructed incorrectly.

    All of these problems can be solved by having an exterior waterproofing membrane installed on the outside of the foundation to create an impenetrable water barrier. When applying this membrane, make sure the smooth side is facing the outside.

    The first step in installing an outside waterproofing membrane is to start excavating. Excavation of the foundation must reach the footings, which may be as much as eight feet deep in a finished basement. The length of the excavation might vary from just the afflicted wall to the whole perimeter of the house, and it must be several feet wide to give space for technicians to operate. Before beginning the excavation, these two conditions must be met.

    When the trenches have been dug to the proper depth, the following stage in erecting the wall is to clean the area of any loose mortar or concrete. In order to smooth down the surface of a stone or rough brick masonry wall, a parge coat of mortar is placed. The wall is left undisturbed while this coat dries before any further work is done.

    After the wall is ready, the professionals will use masonry trowels to apply a thick layer of asphalt-modified polyurethane. The black colour of the substance leads to frequent misidentification as tar or roofing cement. Neither of these compounds, however, can serve as a suitable substitute for the chemical at hand because it is a specialised sealant made for usage below ground.

    After the membrane has had enough time to cure, it will have the consistency of a continuous barrier surrounding the foundation. This barrier will not only keep water from entering, but it will also assist maintain the wall's structural integrity. Rolls of insulating material and heavy-duty plastic drainage board are two common options for covering a membrane. The usage of either or both is possible. The drainage board, in addition to providing additional protection for the membrane, will also channel water downward. Before the membrane is put, clips are installed into the wall to hold any covering in place once it is in place. Doing so guarantees that the membrane will completely cover the clips once they are in place.

    Once that's done, the gap left by the excavation may be filled up, and the foundation can be completely sealed off to stop water seepage. However, there is an adjustment that can be made to the outer waterproofing membrane that has the potential to make it even more successful.

    Exterior Drain Tile  

    Groundwater levels close to a building's foundation might rise to dangerous levels, necessitating the installation of outside drain tile in addition to the membrane. When water is able to flow away from the foundation, it will reduce strain on the walls.

    Prior to installing the external drain tile, a layer of washed gravel must be placed down at the bottom of the excavation. It's done after the membrane is complete. Then, a system of perforated PVC pipe is constructed to lie flush with the footings over the full length of the excavation. This system drains to a sump pump at one or both ends, or to the outside, depending on the situation. Typically, a sock constructed from filtering fabric is wrapped around the pipe to keep debris out of the system.

    After that, the excavation is backfilled and washed gravel is used to conceal the pipe. The aforementioned drainage board will aid in directing water towards the drain tile, and the homeowner will reap the benefits of an outside system that is both thorough and highly successful in keeping the basement dry.

    Putting an external drain tile and a waterproofing membrane is a major undertaking. There is, however, an additional outside method of waterproofing a basement that is both quick and effective.

    Exterior Crack Repair 

    Poured concrete foundations are the most prevalent type and may be found almost anyplace. The most common cause of water seepage in a poured concrete foundation is a crack in the basement wall that is unrelated to the building's structural integrity. Foundation settlement or the same lateral stresses that generate other types of seepage can cause these fissures. Foundation cracking can occur in either of these situations.

    When cracks are identified on the inside of the basement, they are usually repaired by injecting expanding polyurethane into the fissures. If the basement is finished or if an equipment like a furnace or water heater blocks access to the crack, the repair can be done from the outside of the structure.

    It all starts with digging, albeit on a much smaller scale when mending fractures on the outside. Hole somewhat smaller in diameter than the foundation is drilled at the site of the foundation crack. As you can see, we dug all the way down to the foundation footings with this hole.

    After the hole has been dug out, it is backfilled almost to its original height using a granular type of sodium bentonite clay. This granular clay will become plastic after absorbing water from the surrounding soil, creating a resilient, long-lasting barrier throughout the crack's length against the intrusion of water. A fix is invisible once soil or sod have been replenished.

    Prevent Water From Entering Your Basement, Waterproof the Outside Wall

    Waterproofing the exterior wall of your basement can stop water from seeping in. It's a good way to stop flooding before it happens. The required effort here is both different in theory and practise from that of interior waterproofing.

    While internal waterproofing first allows water to seep into the basement before managing it away, this technique of water management is designed to aid in preventing water from ever entering the basement in the first place.

    Exterior waterproofing, which can be placed on either poured concrete or masonry block walls, is an efficient and flexible approach for keeping water out of the basement.

    To waterproof the outside of a basement, you must first excavate the dirt that touches the walls of the basement, then apply a moisture barrier, and then instal dimple board, which is made to deflect water away from the wall.

    The Five-Pronged Approach to Exterior Basement Waterproofing

    1. Water will be directed to the drainage system via the dimple board and exterior moisture barrier in this diagram of the exterior basement wall waterproofing system.
    2. The moisture membrane prevents water from seeping in or collecting at the base of the structure.
    3. To alleviate hydrostatic pressure and guarantee water can flow into the footer drainage system, the dirt is replaced with washed gravel measuring 3/4 inches in thickness.
    4. Water can be channelled away from the house's foundation via a footer drain that is attached to the exterior of the building.
    5. A sump pump can be installed, with either a secondary pump for backup or gravity discharge.

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

    Important Considerations

    • It's a great choice for homeowners who have already finished their basements because the work can be done outside with no disruption to the living space below ground.
    • While a sump pump system is not always required, it is highly suggested.
    • Waterproofing the interior of a building takes far less time to install.
    • With a moisture barrier, dimple board, and exterior drainage, waterproofing the outer walls is a must.

    Whether the problem is a result of a crack in the wall, an improper mortar joint, or porous concrete, an outside waterproofing solution can be tailored to your specific needs. If you're having trouble fixing something in your house, Hitch Property Constructions has advice and answers for you.

    FAQs About Basement Waterproofing

    Two of the best waterproof basement flooring options are epoxy paint and sealed concrete. Not only are they both affordable, but they are durable and allow for adequate waterproofing. Epoxy paint dries thick and hard, providing the necessary durability that goes hand-in-hand with maintaining a basement floor.

    Whether you plan on finishing your basement space or keeping it in its original state, applying a waterproof sealant to the concrete floor is important to lock out moisture. An epoxy-coated basement floor is one of the best ways to maintain and preserve your space.

    Homeowners often neglect concrete basement floors when waterproofing the basement. It is a terrible mistake, as a concrete basement floor is the one area of the basement towards which water flows naturally. That is why most builders create drain areas in obscure places on the basement floor, which lead through a concrete shaft to the soil under the home.

    The walls are usually where the water enters the basement, but it rests on the concrete basement floor and erodes the concrete. In good home construction, the exterior basement walls are coated with waterproof paint and drainage is placed. You can waterproof your concrete basement floor yourself by following these steps.

    1. Prepare the Concrete Basement Floor
    2. Patch the Concrete
    3. Edging
    4. Painting

    Mention “basement waterproofing” to the average homeowner. Their first thought is often of big piles of dirt ringing the perimeter of their house, followed quickly by visions of dollar signs. 

    Of course, there are situations where the best way to waterproof a basement is from the outside, and exterior waterproofing work usually does require excavation. Installing an exterior waterproofing membrane, for example, requires that the affected wall, or the entire foundation in bad cases, be dug up down to the footings leaving a wide enough trench for technicians to work in.

    A significant number of techniques are available to basement waterproofing contractors that can be done on the inside of the basement to repair seepage problems permanently:

    • Crack Injection
    • Interior Drain Tile
    • Sump Pumps and Back-ups
    • Crawl Space Encapsulation

    The interior basement waterproofing method is popular because it does not necessitate extensive exterior excavation and can be completed in a short period of time and at a low cost in certain circumstances.

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