Damp Proofing & Membranes delivery in Crawley

Our damp proofing range for Crawley jobs

• Liquid DPM and tankingCoatings for screeds and below-ground walls.
• Cavity trays and stop endsTo direct water out of the cavity over openings.
• DPC rollsPolymer and bitumen damp-proof course in standard wall widths.
• Weep ventsFor drainage and ventilation at the base of cavities and over trays.
• DPM sheetingHeavy-gauge polythene membrane under concrete floors.

Sizing your order

An extension in Crawley with 16 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.

Delivering damp proofing in Crawley

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

• If the site is up a shared drive or behind other houses, tell us the distance from the road.
• If neighbours share the access, it helps to let them know a lorry is coming.
• For a phased build we can split the order so materials arrive as each stage starts, which keeps the site clear.

Getting the right damp proofing

DPC width

Match the DPC width to the wall leaf so it runs the full width of the masonry.

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.

Common questions from Crawley

What is the difference between DPC and DPM?

DPC is a strip built into walls to stop damp rising through the masonry. DPM is a sheet laid under a concrete floor slab. They are lapped together so there is no gap.

Is there a minimum order for delivery to Crawley?

There is no fixed minimum. For very small orders we will tell you honestly if the delivery cost outweighs the materials, so you can decide.

How thick should a DPM be?

1200-gauge polythene, around 300 microns, is a common specification for floor slabs. Your design may call for something different.

Can I add other materials to my Crawley delivery?

Yes. Put everything on one list, from damp proofing to fixings and PPE, and we will price it as one delivery where the products can travel together.