What do you put on cinder block walls in a basement?

Author: Prof. Gina Miller III  |  Last update: Sunday, March 22, 2026

The Thinset Mortar Method for Damp Basement Walls Use RadonSeal Plus and Apply the Mortar to the Cinder Blocks – Apply two wetting applications of RadonSeal Plus to the blocks.

What is the best sealer for cinder block basement walls?

we learned that the most often recommended way to seal cinder and concrete basements is Drylok, a thick milkshake-like paint of sorts that goes on slowly and stinkily, but after two heavy coats it really does the job. As in no more moisture seeping through the cement and the cinder for at least ten years or more.

What is the best covering for cinder block walls?

Veneering, which is likely your best bet for long-lasting but also the most work. Stucco, brick, and stone are all options that include a drip space between the wall and veneer when properly installed. Ideally you'd also add a cap to keep out rain and tie the two together visually.

How to waterproof a cinder block basement?

8 Tips For Waterproofing A Concrete Block Foundation
  1. Meticulous Prep. ...
  2. Repair Cracks and Fill Gaps. ...
  3. Use Crystalline Waterproofing. ...
  4. Install An Interior Drain System. ...
  5. Use Vapor Barriers And Cove Diverters. ...
  6. If you're stuccoing, don't seal first. ...
  7. Address the Exterior. ...
  8. Seal From The Outside.

Why not use Drylok on basement walls?

Basement walls (block or poured) have humidity and moisture move through them all the time. Anything that is below grade will never be 100% waterproof. that is why the drylok is failing.

Man Builds Hidden Underground BUNKER in his Backyard | DIY Basement by @AleksandrKvasha

What is the problem with DRYLOK?

As Drylok is an indoor waterproofing sealant, it does not last forever. Drylok comes with a 7-15-year warranty, and while this is a very long time, it does mean that you may have to renew this sealant again in the future. Give AK Water Works a call to discuss a more permanent option.

What is better than DRYLOK for basement walls?

Superior Waterproofing Performance: Crystalline Waterproofing offers a higher level of waterproofing performance compared to Drylok Extreme. Its crystalline technology penetrates into the concrete, forming insoluble crystals that block capillary pores and microcracks, effectively preventing water penetration.

Can water seep through cinder block walls?

They are constructed in a similar fashion as brick foundations. These types of foundations are especially prone to leakage for the following main reasons: The concrete blocks used to build the foundations are hollow. These spaces permit water to seep through and collect within the walls.

How much does it cost to waterproof a cinder block basement?

The cost to waterproof a basement falls between $3 and $10 per square foot on average, although where in this range your pricing falls depends largely on the type of waterproofing method you choose. In any case, large spaces require more time, labor, and material to waterproof than small spaces.

How do you cover cinder block walls in a basement?

How to Cover Unfinished Basement Walls
  1. Materials for Covering Unfinished Basement Walls.
  2. Method 1: Treatments for fabrics.
  3. Method 2: Construct a Peg Board Wall.
  4. Method 3: Wood Paneling.
  5. Method 4: Paint & Parging.
  6. Method 5: Drylok Masonry Waterproofer (Tinted)
  7. Method 6: Veneers for the Walls (Stone or Brick)

What is the cheapest way to cover a cinder block wall?

Concrete is an inexpensive way to create a strong cover.

How can I cover my basement walls cheaply?

10 Inexpensive Basement Wall Panels
  1. Stone or Brick 3D Wall Paneling. Adding brick or stone paneling can increase the aesthetic appeal and be easy on the budget. ...
  2. Wood Wall Paneling. Wood really warms up the basement. ...
  3. Rigid Foam Sheets. ...
  4. Decorative Panels. ...
  5. Flat Panels. ...
  6. Board and Batten. ...
  7. Drywall. ...
  8. Wahoo Walls.

Do you need a vapor barrier on a cinder block wall?

It is best to place vapor barriers on foundation walls in basements before installing posts and doing primary insulation. Installing a moisture barrier will help keep moisture in the basement and prevent it from seeping into the walls and floors, leaving no room for mold.

How do I stop my cinder block basement from leaking?

Concrete block walls can admit water to the basement through cracked mortar joints and through the porous block itself. One of the best ways to waterproof a block foundation is to install an exterior waterproofing membrane. This can be done during construction or by excavating around an existing home.

How to waterproof basement walls from the inside?

5 Steps to Effectively Waterproof Basement Walls
  1. Remove All Standing Water and Verify That the Area is Completely Dry. ...
  2. Clean and Prepare the Area. ...
  3. Plug Holes and Cracks. ...
  4. Reseal Windows, Doors and Window Wells with Caulk. ...
  5. Apply Waterproof Coating.

How do you apply Drylok to cinder block walls?

Apply First Coat: Using a brush, roller, or sprayer, apply the first coat of DRYLOK to the prepared surface. Work the product into the pores of the masonry for comprehensive coverage. Apply Additional Coats: For enhanced protection, apply additional coats of DRYLOK as needed.

Which is the cheapest basement waterproofing method?

The cheapest basement waterproofing method is typically applying a waterproof paint coating, which can cost as little as a few dollars per square foot for materials if doing it yourself.

How long will a cinder block basement last?

Block doesn't rot, warp or grow mold, and it stands up remarkably well to even the most extreme weather. Even with a lifespan of up to 100 years, you can be sure the building's structural integrity isn't compromised over the years like it can be with wood.

What is a French drain in a basement?

A French drain (also called a weeping tile, drain tile, perimeter drain or sub-surface drain) is a common basement waterproofing solution. It's a trench containing a perforated pipe that redirects surface water and groundwater away from the foundation.

Will Drylok stop water in basement?

DRYLOK® Masonry Waterproofer protects masonry surfaces from the damaging effects of water penetration. It seals porous masonry walls above and below ground to hold back the flow of water, even under pressure, and helps keep basements dry.

How do I stop water from seeping through my basement walls?

What to do if your basement is leaking
  1. Check gutter and downspouts. Clogged gutters and downspouts can cause water to overflow, pool around your foundation walls, and enter your home. ...
  2. Seal cracks in the foundation. ...
  3. Fix grading issues. ...
  4. Clean window wells. ...
  5. Contact a basement waterproofing expert.

How do you seal a cinder block basement wall?

Skim coat the cinder blocks with thin-set mortar. Apply Ion-Bond Armor over the thin-set. Used for harder to seal cinder block walls that historically get wet (or seep water) after heavy rainfalls and.

Is Kilz good for basement walls?

RECOMMENDED USES:

This product is ideal for use on above and below grade basement, masonry, garage, and foundation and landscape walls. Use on properly prepared, interior or exterior surfaces, including: • Masonry • Stucco • Cinder blocks • Brick Not for use on floors and walls with active water leaks.

What type of basement waterproofing is best?

The most common basement waterproofing methods include:
  • Exterior waterproofing coating.
  • Interior sealants.
  • Interior water drainage.
  • French drains (interior and exterior)
  • Sump pump installation.

How many coats of DRYLOK should I do?

A minimum of 2 coats is required for the fully transferable warranty to apply. Now, inspect the surface for any remaining pinholes and fill them in. If it still leaks, a random pore or pinhole is still open. Find it and fill it.

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