Penetrating Damp Solutions
Penetrating Damp Solutions
Penetrating damp work finds rain entering through gutters, pointing, sills or flashings on UK houses and flats, then closes that entry. It is for stains that worsen after wet weather at any height. We do not re-roof a whole house on this visit. Request a quote with the form or WhatsApp.
Penetrating damp is lateral water. We trace the entry point, then repair the path rather than painting over the stain.
Get a QuoteWhat people notice first
Patches that worsen after rain and ease in a dry spell
Stains at any height, including above windows and on chimney breasts
Ceiling marks under a valley, a parapet or a flat roof
Green staining or blown pointing on the wet elevation
What's included
- External checks of pointing, sills, gutters and flashings
- Internal moisture readings to map the spread
- Repairs aimed at the entry point
- Advice on drying the wet fabric
- A note of what is outside this visit
What this visit does not do
- We do not re-roof a whole house or rebuild a chimney as a roofing contract
- A saturated inner leaf from a bridged cavity is specified as cavity work
- We do not tank the inside of a wall that is still taking rain
How the visit runs
The wet patch inside is lined up with the outside: gutters, downpipes, cracked sills, open joints, failed flashings and render cracks. Readings show how far the water has spread. The repair closes that entry. Where the defect is a roof structure we do not cover, the report says a roofer is required before drying and plastering.
Investigate first
We map the stain, take moisture readings, check salts where plaster has blown, and look outside at ground levels, gutters, pointing and the damp proof course line. The damp type is written down before any treatment.
Treat the path that is wet
Rising damp, rainwater, condensation, a bridged cavity or a wet cellar each get the repair that closes that path. A damp proof course is used only where groundwater is the cause.
Leave a record and a drying time
You get a treatment record and the guarantee that applies to the system installed. Plaster and paint wait until the readings say the wall is ready. Decorating a wet wall brings the mark back.
What changes the price
The price moves with access height, how much masonry or roof detail is failed, and whether scaffolding is required.
After the visit
Clear gutters after leaf fall. Do not coat the inside until the entry is closed and the masonry has dried, or the paint blisters.
What fails if this is skipped
Pointing and rainwater goods are maintenance. A repaired joint fails again if the gutter still discharges onto it.
Masonry cream and internal waterproof paint do not stop water from a cracked gutter or an open flashing. They trap the water that is already in the wall.
Questions
These are the questions for this job. Wider damp questions sit on the FAQ page.
All FAQsAreas we cover
The same survey runs in these counties, and across the rest of the UK.
See all areas we coverYour building, diagnosed before it is treated.
Rainwater getting through roofs, walls, pointing, and failed details.
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