How To Waterproof Basement From Outside

How to Waterproof Basement From Outside

Waterproofing your basement from the outside is a crucial step in preventing water damage and maintaining a dry and healthy living space. Here are the essential aspects of basement waterproofing from the outside:

1. Foundation Inspection and Repair

Begin by inspecting the foundation of your home for any cracks, gaps, or other areas where water can penetrate. Seal all openings using hydraulic cement or a specialized foundation sealant. If significant cracks or structural issues are present, consider consulting a foundation repair specialist.

2. Excavation and Grading

Excavate the soil around the exterior perimeter of your basement walls to a depth of at least 6 inches below the foundation footing. Grade the soil away from the foundation to prevent water from pooling near the walls.

3. Drainage System Installation

Install a drainage system to collect and divert water away from the basement walls. French drains are commonly used, which are perforated pipes surrounded by gravel that are buried along the perimeter of the foundation. The pipes should be connected to a sump pump that will pump the collected water away from the house.

4. Waterproofing Membrane

Apply a waterproofing membrane to the exterior surface of the basement walls. Various membrane materials are available, such as bituminous coatings, self-adhering membranes, or dimpled plastic sheets. The membrane creates a barrier that prevents water from seeping through the walls.

5. Insulation

Adding insulation to the exterior of the basement walls helps to reduce heat loss and improve energy efficiency. Rigid foam insulation boards or spray foam insulation can be applied to the walls before backfilling the excavated area.

6. Backfilling and Compaction

Once the waterproofing and insulation are in place, backfill the excavated area with soil. Compact the soil firmly to prevent settling and ensure proper drainage.

7. Downspout Extensions

Extend the downspouts from your gutters to direct rainwater away from the foundation. The extensions should discharge water at least 4 feet away from the house.

8. Landscaping

Consider landscaping around your home to minimize water accumulation near the foundation. Create slopes or install rain gardens to redirect water away from the house.

Conclusion

Waterproofing your basement from the outside is a comprehensive process that requires attention to detail and proper execution. By following these essential aspects, you can effectively prevent water seepage, protect your basement from damage, and ensure a dry and comfortable living space.