Damp Proofing & Membranes delivered to Blackheath

Choosing from our damp proofing range

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

How much will you need?

An extension in Blackheath with 32 m of cavity wall needs DPC in both leaves: about 3 rolls in 30 m lengths once laps are allowed for. A 15 m² floor slab needs about 17.2 m² of DPM including laps, which is 1 roll of 4 × 25 m sheeting.

How delivery works in Blackheath

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

• Give us the full postcode for the drop point; deliveries around SE3 are priced to the exact address.
• Mention any overhead cables, low branches or narrow gateways, because they decide whether a crane offload is possible.
• If the drop point is block paving or soft ground, say so; heavy pallets and bulk bags can mark or sink.

Choosing 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.

Questions about damp proofing delivery in Blackheath

Can I add other materials to my Blackheath 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.

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.

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

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

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.