Exterior waterproofing, also sometimes called external waterproofing, fixes your leaky basement from the outside of your house by exposing the foundation and using the necessary waterproofing material to create a foundation waterproofing system that will redirect and disperse water away from your foundation walls. This is one of the best waterproofing solutions for leaky basements and the most widely used technique for fixing the basement foundation.
The materials utilized for waterproofing include hydraulic cement, two layers of Hydro Guard rubberized membrane, reinforcing mesh, air-gap drainage membrane, drainage tile (weeping tile), and 3/4-inch gravel.
The Differences Between Damp-proofing vs. Waterproofing Your Basement
Is there a distinction between “waterproofing” and “damp-proofing” when it comes to the basement and external foundation of your house? What is meant by these terms?
There are differences – and these differences are extremely significant!
The process of exterior damp proofing involves coating your foundation with a thin layer of a liquid asphalt-based material. Since there is no rubber, damp proofing does not provide any foundation crack repair capabilities. Dampproofing is done while constructing a property to make sure it only meets the minimal minimum of building code standards. The average cost to cover 100 feet of any base is $20 to $30. The foundations of homes built before 1980 have deteriorated due to a lack of moisture-proofing or waterproofing. Water can still sneak in even when dampproofing helps keep out part of the moisture.
The process of exterior waterproofing fills in or seals cracks or gaps caused by movement in foundations. Hydro Guard is a commercial-grade product from RCC that we employ as our main waterproofing technique. It costs between $200 and $250 to cover 20 feet, and the application procedure entails two layers. By employing a commercial-grade waterproofing solution, RCC, as opposed to damp-proofing, can provide 50 years of protection against moisture and water incursion.
NOTE: Be wary of the materials you employ to finish the waterproofing of your property. In order to lower the cost of their supplies, many waterproofers and contractors may make promises to perform waterproofing but instead employ damp-proofing solutions.
Exterior Waterproofing Benefits
Reduces the moisture in a basement
This eliminates sources of musty odors and allergens within your home.
Eliminates foundation wall deterioration while improving the structural soundness:
This leads to reduced costs of future home repairs and prevents loss of personal belongings due to a water-leakage.
Increase your property value
When a home experiences moisture and water issues, it may lead to a drop in the value of home. Realtors usually recommend hiring waterproofers to fix basement issues, making waterproofing pivotal to increasing the value of your home.
Strengthens the foundation of your home
Water leaks can weaken the structural base of your foundation, leading to future problems like interior cracks and shifting of your floors.
Waterproofing gives you peace of mind for the structural safety of your home and the security of your belongings.
Common Exterior Leak Problems
Basement Window Wells
Water build up around near-grade basement windows can cause water infiltration through your window sill.
The addition or replacement of malfunctioning window wells accompanied with installation of vertical weeping tile and a bedding of 3/4 gravel will ensure that water entering your window area will be drained. This will prevent leaks in your foundation and flooding of your basement.
Block or Brick Foundation Homes
Block and brick walls contain air voids and mortar joints that could allow water flow to enter the cervices of your walls.
A combination of external and internal waterproofing methods can be used to prevent and repair water infiltration within block and brick foundations. Water pooling found inbetween brick walls are drained by drilling through the interior of the foundation to drain the water buildup.
Joint leaks include the junctions between your wall and footing, your basement floor and foundation and the joints where new extensions have been built.
Hydraulic Cement is used to patch and fill these various types of joints. The modified cement is key to preventing further damage and water leaks.
Top of Foundation
The Sill, or where the foundation meets the brick could become a spot where water leakage happens if the sill is not sealed or if the original seal has deteriorated.
Maintaining the Sill using a waterproof sealer is important for fixing this issue and preventing water penetration into you sill. Even though there is no hydrostatic pressure, water can still find its way through this spot.
Exterior Waterproofing Process
1. To waterproof the outside of the building, excavation must be completed around the entire structure: Most excavations have dimensions of approximately 2 ½ feet in width and 4 to 8 feet in depth. The size of the excavation is determined by the elevation of your property.
2. Installing Speed Shoring: This protects workers while preventing the excavation site from becoming covered in dirt once more.
3. Old Weeping Tiles are Removed: The old weeping tile may be removed after excavation is completed and the footing is reached. A brand-new 4-inch weeping tile with a filter cloth is then installed after that.
4. Foundation Wall Cleaning and Inspection: Following that, the foundation walls are cleaned and inspected for any structural cracks or gaps. Chiseling away the damaged areas leaves holes that are filled in with a special type of cement that does not shrink when applied.
5. Using Trowel-On Rubber Membrane Application: This is an essential step in external foundation waterproofing. It is designed to extend and widen if the foundation settles and travels farther.
6. Installation of mesh over membrane and last rubber waterproofing layer: This reinforces the first rubber layer of the rubber membrane by acting as an additional layer of rubber.
7. The top of the termination bar is secured to the soil side drainage sheet: Commercial-grade drainage functions as a drainage membrane and a protection board more effectively than domestic-grade dimple boards.
8. Installing Window Wells: If any of your home’s windows are below grade, you should install window wells. A 4-inch weeping tile is installed vertically from the inside of the window well to the footings. Verify the distance between the weeping tile and the pipe.
9. To improve drainage capacity, a layer of 3/4-inch clear gravel is layered over the weeping tile: The gravel layer is mixed in with the soil to prevent excessive water absorption via the weeping tile, which could clog the drainage.
10. The area is filled with native soil and compacted to its previous level: After the earth is relocated back to its proper position, your foundation will be fully waterproofed and you won’t have any more issues with water seeping into your basement’s interior or exterior.