Damp proofing in York

Damp walls, tide marks, peeling paint or a musty smell in your York home? We find out whether it is rising damp, penetrating damp or condensation, then quote the repair that actually fixes it.

• Damp proofing and damp surveys across York and surrounding areas
• Chemical damp-proof course injection for rising damp
• Penetrating damp treatments and water-repellent wall protection
• Cause confirmed with moisture readings before any work

Why York homes get damp

York's historic brick and timber properties near the Ouse and Foss, and its many rentals, holiday lets and shared houses, often have limited airflow. Older buildings were designed to breathe, and modern sealing can trap moisture.

Rising damp and chemical injection in York

True rising damp shows as a tide mark up to about a metre high, salts on the plaster and skirting that rots from behind. Where the damp course has failed, we inject a chemical damp-proof course at the base of the wall, then replaster with a salt-resistant render where the old plaster is contaminated. Where the cause is a bridged damp course — raised paths, rendered plinths or debris in cavities — we fix that first so you are not paying for injection you don't need.

Penetrating damp treatments

Damp patches that grow after rain come from water getting through the wall: porous brickwork, leaking gutters and downpipes, or failed window seals. We trace the entry point, fix the source and treat the wall — including breathable water-repellent masonry creams that stop rain soaking in while letting the wall dry out. Where cracked or blown render is the problem, we recommend having the wall re-rendered by a specialist exterior renderer, and we treat the damp once the render is sound.

Condensation that looks like damp

Most damp calls in York are condensation. Black mould on cold walls, wet windows and damp behind wardrobes point to humidity, which ventilation fixes rather than damp proofing. PIV units & ventilation →

Damp surveys in York

A diagnostic damp survey visit is £150, with findings explained on the day. A written report with photos and recommendations — for buyers, landlords or tenants — is £250. Repair work is quoted separately.

Areas we cover for damp proofing

Central York and Acomb, Clifton York, Heworth York, Fulford York, Tang Hall, Osbaldwick, Bishopthorpe, Copmanthorpe, Dunnington, Heslington, plus the surrounding villages. Postcodes YO1–YO32.

Got black mould to clean? Mould removal in York → Damp proofing across Yorkshire →