tar paper on basement walls

"Protect Your Basement: Tar Paper Wall Installation Guide"

By Hannah YoungFebruary 10, 2026

If you're a homeowner dealing with moisture issues in your basement, you might have come across the term "tar paper" as a potential solution. But what is tar paper, and is it the right choice for your basement walls? Let's delve into the world of tar paper and explore its pros, cons, and alternatives.

Understanding Tar Paper

Tar paper, also known as asphalt-impregnated paper or felt paper, is a water-resistant material made from cellulose fibers saturated with bitumen, a sticky, black, and highly viscous liquid. It's often used as a waterproofing barrier in construction, particularly in roofs and foundations. In the context of basements, tar paper is typically applied to the exterior walls before backfilling to prevent water from seeping through.

How Tar Paper Works

Tar paper works by creating a barrier that repels water. When water comes into contact with the tar paper, it beads up and rolls off, preventing it from penetrating the wall and entering your basement. However, it's essential to understand that tar paper is not a waterproofing solution in itself; it's a preventive measure that should be used in conjunction with other waterproofing methods.

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Tar Paper on Basement Walls: Pros and Cons

Pros

Inexpensive: Tar paper is one of the most affordable waterproofing solutions for basement walls.
Easy to Install: Applying tar paper is a straightforward process that can be done by homeowners with basic DIY skills.
Effective as a Preventive Measure: When used correctly, tar paper can help prevent water from entering your basement.

Cons

Limited Lifespan: Tar paper has a lifespan of about 10-15 years, after which it may start to degrade and lose its water-resistant properties.
Not a Standalone Solution: Tar paper should not be used as the sole waterproofing method for your basement walls.
Environmental Concerns: The production and disposal of tar paper can have negative environmental impacts.

Alternatives to Tar Paper

Given the limitations of tar paper, it's worth exploring other waterproofing options for your basement walls:

Exterior Waterproofing Membranes: These modern, synthetic materials are more durable and environmentally friendly than tar paper. They come in various forms, including self-adhesive membranes and those that require a separate adhesive.
Interior Waterproofing Systems: If water is already entering your basement, you might need to consider interior waterproofing methods, such as sealants, sump pumps, or interior drainage systems.

Best Practices for Using Tar Paper on Basement Walls

If you decide to use tar paper for your basement walls, follow these best practices to maximize its effectiveness:

Step	Action
1	Prepare the wall surface by ensuring it's clean, dry, and free of any debris or contaminants.
2	Cut the tar paper to the appropriate size and overlap the sheets by at least 4 inches to create a continuous barrier.
3	Apply the tar paper to the wall, starting from the bottom and working your way up. Use staples or nails to secure the paper in place.
4	Ensure the tar paper extends at least 6 inches above the footing and covers any cracks or joints in the wall.
5	Backfill around the tar paper, taking care not to damage it. Consider using a clean, well-draining material, such as gravel, to facilitate proper drainage.

Remember, using tar paper is just one part of a comprehensive waterproofing strategy. Regularly inspect your basement for signs of water intrusion, and address any issues promptly to protect your home's structural integrity and your belongings.