Swanage, Dorset
Basement Tanking in Swanage
Cementitious tanking and cavity drain systems for basements, cellars and below-ground rooms.
Swanage property owners come to us for basement tanking for one of two reasons: something has failed, or the house looks tired.
Most of what we see around Swanage reflects the wider Dorset pattern — Purbeck and Portland stone, thatched cottages and substantial coastal housing, and salt exposure on seafront properties and lime work on heritage stone.
The area sees mild but exposed along the coast, which is the single biggest factor in how long any render lasts here. Seafront elevations in weymouth and swanage take salt as well as water, which attacks render bonds far faster than inland weathering.
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 Swanage
| 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 Swanage
Basement Tanking in Swanage
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 Swanage
What time of year is best for rendering?
Spring through autumn is ideal. Render should not be applied in frost or in very hot direct sun, so winter work needs protection and settled conditions.
Can you render over existing render?
Sometimes, if the existing coat is completely sound and well-bonded. We hammer-test it first. Anything hollow has to come off, because covering failure just hides it.
Are you insured?
Yes — full public liability cover, and we can send the certificate before we start. We are happy to provide RAMS for commercial and contractor work.
What areas do you cover?
We work UK-wide, with teams across England, Scotland, Wales and Northern Ireland. If we are not the right firm for your location we will tell you rather than waste your time.
What is the difference between Type A and Type C waterproofing?
Type A is a bonded barrier that keeps water out entirely. Type C accepts ingress, then drains and pumps it away behind a membrane. Type C is more forgiving of structural imperfections.
Free survey in Swanage
We will confirm whether basement tanking suits your walls before quoting a price.