Damp Proofing & Membranes for Borehamwood, delivered to site

Our damp proofing range for Borehamwood jobs

• DPM sheetingHeavy-gauge polythene membrane under concrete floors.
• Radon barriersGas-resistant membranes for areas that need radon protection.
• Liquid DPM and tankingCoatings for screeds and below-ground walls.
• Weep ventsFor drainage and ventilation at the base of cavities and over trays.

Getting the right damp proofing

Laps and joints

DPM and DPC need generous laps and sealed joints; follow the manufacturer's guidance.

Is radon protection needed?

Parts of the UK need radon protection in new buildings and extensions. UKHSA radon maps show the areas; building control will tell you what applies.

In England, building work is checked against the Approved Documents, for example Part A for structure and Part L for energy efficiency, through your council's building control team or a registered building control approver.

How much will you need?

An extension in Borehamwood with 24 m of cavity wall needs DPC in both leaves: about 2 rolls in 30 m lengths once laps are allowed for. A 25 m² floor slab needs about 28.7 m² of DPM including laps, which is 1 roll of 4 × 25 m sheeting.

Delivery to Borehamwood: what helps

Rolls are light enough to travel with a mixed load and are handed off at the kerb. Borehamwood is inside our standard mainland delivery area.

• Keep cement, plaster and boards dry: have a tarpaulin or a garage space ready before they arrive.
• In summer Borehamwood gets around 16h 40m of daylight, but early deliveries still beat the traffic and give the longest working day.
• If the site is up a shared drive or behind other houses, tell us the distance from the road.

Damp Proofing & Membranes questions

Do you supply cavity trays?

Yes, with stop ends and weep vents for openings and abutments.

Can you deliver damp proofing to a site with restricted access in Borehamwood?

Usually, yes. Tell us about the access when you ask for a price and we will plan the vehicle and offload, or say if a smaller vehicle is needed.

Do you deliver damp proofing to trades and homeowners in Borehamwood?

Both. Trades can apply for a trade account; homeowners and self-builders can order on a delivered quote.

Do I need a radon barrier?

It depends on where you are. In radon-affected areas building control requires radon protection in new buildings and extensions.