Chepstow, Gwent
Basement Tanking in Chepstow
Cementitious tanking and cavity drain systems for basements, cellars and below-ground rooms.
We carry out basement tanking across Chepstow and the surrounding Gwent area throughout the year.
The prevailing picture in Gwent is valley terraces, stone cottages and postwar estate housing. That means damp in solid-wall valley terraces and failed cement render comes up more here than almost anywhere else.
Local conditions bring high rainfall with sheltered valley conditions, and that has a direct bearing on which systems are worth specifying. The valleys hold moisture and see limited sun on north-facing slopes, so algae and persistent damp are more common here than the rainfall alone would suggest.
When basement tanking is the right call. Choose tanking for cellar and basement conversions, persistently wet below-ground rooms, and any space you intend to make habitable.
Guide price in Chepstow
| Guide price | £115–£195 per m² |
|---|---|
| Applied thickness | Multi-coat cementitious system |
| Guarantee | 20 years |
Indicative only. The guide-price tool gives a range for your property; the survey gives the fixed price.
What the job includes
- Cementitious tanking slurries
- Cavity drain membrane systems
- Sump and pump installation
- Type A and Type C waterproofing
- Fillets and junction detailing
- Withstands hydrostatic pressure
We will survey the property, tell you what the walls actually need, and put it in writing with a fixed price.
Also covering near Chepstow
Basement Tanking in Chepstow
Tell us about the property and we will call you back to arrange a survey.
What happens next
Four steps from enquiry to finished wall
Free survey
We visit, test the substrate, measure up and identify what caused any existing failure.
Written quote
An itemised fixed price with the system named, materials specified and scaffold included.
Booked in
An agreed start date, scaffold arranged, and a clear run of days set aside for your job.
Finished and guaranteed
Site cleared, scaffold struck, guarantee documents and system warranty issued.
FAQs
Basement Tanking in Chepstow
How long does basement tanking last?
A correctly designed and installed system carries a 20-year warranty. Type C systems need periodic pump servicing to maintain that.
How long does a rendering job take?
A typical three-bedroom semi is usually one to two weeks on site including scaffold, preparation, application and finishing. Weather, wall condition and the system chosen all move that.
Do I need planning permission to render my house?
Usually not on a standard house, but you will if the property is listed, in a conservation area, or if rendering would significantly change its appearance. We flag it at survey.
Will you need scaffolding?
For anything above single storey, yes — it is safer and produces a better finish than working off ladders or towers. Scaffold is included and itemised in the quote.
How long before I can paint new render?
Through-coloured systems need no painting at all. Sand and cement should cure for around 28 days before masonry paint goes anywhere near it.
Free survey in Chepstow
We will confirm whether basement tanking suits your walls before quoting a price.