Introduction: Rising damp is a common issue in many homes, especially in older buildings where moisture from the ground slowly rises through the walls. This dampness can lead to unsightly stains, peeling paint, mold, and even structural damage if left untreated. While professional repairs can be costly, there is an easy, economical, and effective DIY method to tackle rising damp and restore the condition of your walls. With the right approach and a few affordable ingredients, you can permanently fix the problem and prevent moisture from returning.
Ingredients:
1 part Portland cement
2 parts sand (fine sand works best)
1/2 part hydrated lime
1 part water
A mixing bucket
Trowel or plastering tools
Plastic sheeting (for moisture barrier)
Damp-proof membrane (optional, for added protection)
Instructions:
Assess the Damage: Begin by thoroughly inspecting the walls affected by rising damp. Look for signs of moisture, peeling paint, mold, or efflorescence (white salt deposits). Make sure the affected area is clearly marked for repair.
Prepare the Wall: Remove any damaged plaster or loose paint from the wall. Use a scraper or putty knife to ensure the surface is clean and smooth. It’s important to expose the bare wall surface so the new plaster can bond properly.
Prepare the Damp-Proof Mix: In a large mixing bucket, combine 1 part Portland cement, 2 parts fine sand, and 1/2 part hydrated lime. Hydrated lime is crucial as it helps improve the workability and breathability of the mix, which is especially important for older walls. Slowly add water, mixing as you go, until the consistency is thick but smooth, similar to a wet sandcastle mix.
Apply the Damp-Proof Plaster: Using a trowel or plastering tool, apply the cement mix generously to the affected wall area. Start from the bottom and work your way up, ensuring that the mixture covers the wall evenly. Press the plaster firmly against the wall to eliminate any air pockets and to ensure good adhesion.
the rest on next page
ADVERTISEMENT
