How to Damp Proof Walls

Beginner 10 min 18 steps 40597 views Rating: 3.7/5 Published: 2026-06-02

Purchase a damp-proof coating based on your wall's material.. Put on gloves, protective eyewear, and a respirator.. Lay down a drop cloth along the first wall that you're going to work on.

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Steps

1

Purchase a damp-proof coating based on your wall's material.

Step 1

Purchase a damp-proof coating based on your wall's material.

2

Put on gloves, protective eyewear, and a respirator.

Step 2

Put on gloves, protective eyewear, and a respirator.

3

Lay down a drop cloth along the first wall that you're going to work on.

Step 3

Lay down a drop cloth along the first wall that you're going to work on.

4

Use a lint-free cloth to wipe down any damp areas.

Step 4

Use a lint-free cloth to wipe down any damp areas.

5

Use a paint roller and brush to apply liquid coatings.

Step 5

Use a paint roller and brush to apply liquid coatings.

6

Spray aerosol coating evenly across the walls.

Step 6

Spray aerosol coating evenly across the walls.

7

Apply cement coating with a putty knife.

Step 7

Apply cement coating with a putty knife.

8

Identify the problem area and source of the moisture.

Step 8

Identify the problem area and source of the moisture.

9

Prep your wall by cleaning it.

Step 9

Prep your wall by cleaning it.

10

Cover exterior walls with polyethylene sheeting to keep wood walls dry.

Step 10

Cover exterior walls with polyethylene sheeting to keep wood walls dry.

11

Use a squeegee or credit card to smooth the sheeting out.

Step 11

Use a squeegee or credit card to smooth the sheeting out.

12

Use silicone caulk to seal any gaps in cracked masonry.

Step 12

Use silicone caulk to seal any gaps in cracked masonry.

13

Hire a contractor to install plastic sheeting in drywall.

Step 13

Hire a contractor to install plastic sheeting in drywall.

14

Get a contractor to install chemical damp-proof in masonry walls.

Step 14

Get a contractor to install chemical damp-proof in masonry walls.

15

Improve the ventilation in your room with fans and windows.

Step 15

Improve the ventilation in your room with fans and windows.

16

Keep your heating on or use a radiator to keep the room dry.

Step 16

Keep your heating on or use a radiator to keep the room dry.

17

Use a dehumidifier to keep the room free of humidity.

Step 17

Use a dehumidifier to keep the room free of humidity.

18

Clear your gutters regularly to avoid water spilling over.

Step 18

Clear your gutters regularly to avoid water spilling over.

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