Basement waterproofing is for walls and floors below outside ground, where water pressure is not the same problem as rising damp above ground. It is for houses and smaller buildings in England, Scotland, and Wales. Send the quote form or WhatsApp before any tanking is assumed.
Basement Waterproofing
A room below ground is holding back soil moisture. The survey chooses the system. It is not a damp-proof course drilled into a dry upper wall.
A barrier coating tries to hold the water out. A cavity-drain membrane lets water in behind a finish and takes it to a drainage point. The building and the water decide which one.
Preparation of the substrate, the system named, how water leaves the room, and the finish. A quote that skips the floor often fails at the wall-to-floor joint.
Painting a cellar wall with a masonry sealer is not a design. Condensation on a cold basement wall still needs ventilation even after it is tanked.
Basement Waterproofing
Water often shows at the junction first. A wall-only coating leaves that joint open.
Earth is against the outside face. There may be no “outside” we can dig up, so the system is designed from inside.
Open lightwells and external steps bring rain to the same wall. Drainage there is part of the damp, not a separate odd job.
A store that can stay slightly damp is a different brief from a bedroom. The survey quotes the use you actually want.
Water at floor level is part of the design. A wall-only coating leaves the wall-to-floor joint open.
A cavity-drain membrane needs a place for the water to go. A pump is specified only when the water cannot fall away.
We record where water enters, what the walls and floor are made of, and how you need to use the space.
We record where water enters, what the walls and floor are made of, and how you need to use the space.
The system matches the water and the structure.
Loose coatings and contaminated plaster come off so the system is bonded or fixed to a sound background.
The wall-to-floor junction and the drainage exit are part of the same visit.
A cold basement can still grow mould from room air after the structure is dry.
The treatment named in the written quote carries a 30-year guarantee.
Below-ground work is priced from the square metres of wall and floor, the system type, how water leaves the building, and the finish you need. A sealer painted over a wet wall is not a comparable quote. The survey comes before a figure.
Questions that decide whether this is the right job.
No. Rising damp is groundwater creeping up a wall that is mostly above ground. A basement is holding back earth and water pressure.
No. Some rooms are better with a drained membrane. The survey says which, and why.
Only if the system chosen needs somewhere lower to send the water. It is not an automatic extra.
Tell us that at the survey. Storage and habitable use are different specifications, including ventilation.
Tell us the floor, whether it follows rain, and the postcode. The quote follows the survey.
Get Your Free QuoteA damp survey with moisture meters and thermal imaging, so the cause is known before any work.
Learn more about Damp Survey & Moisture ReportGroundwater travels up through brickwork when the damp-proof course is missing or has failed.
Learn more about Rising Damp TreatmentAirflow and temperature are managed, often with ventilation, so indoor humidity comes down.
Learn more about Condensation Control SystemsSurveys run in Kent, Cardiff, and Glasgow, and in the other counties and towns on the areas page.
Name the room, the floor, and what the wall is doing. WhatsApp takes the same details.