Damp Proofing & Membranes delivery in Caerphilly

Choosing from our damp proofing range

• Weep ventsFor drainage and ventilation at the base of cavities and over trays.
• Radon barriersGas-resistant membranes for areas that need radon protection.
• Cavity trays and stop endsTo direct water out of the cavity over openings.
• DPC rollsPolymer and bitumen damp-proof course in standard wall widths.
• DPM sheetingHeavy-gauge polythene membrane under concrete floors.

Quantities: a worked example

An extension in Caerphilly with 24 m of cavity wall needs DPC in both leaves: about 2 rolls in 30 m lengths once laps are allowed for. A 50 m² floor slab needs about 57.5 m² of DPM including laps, which is 1 roll of 4 × 25 m sheeting.

Things to check before you order

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.

Laps and joints

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

Wales has its own Approved Documents, including its own Part L for energy efficiency, and building control is handled by the local authority or a registered approver.

Delivery to Caerphilly: what helps

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

• Weight limits on bridges or private roads near the site matter for larger lorries, so mention any you know of.
• Have someone on site for the delivery if you can, or agree a safe drop point with us in advance.
• For a phased build we can split the order so materials arrive as each stage starts, which keeps the site clear.

Damp Proofing & Membranes in Caerphilly: questions

Do you supply cavity trays?

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

Do you deliver damp proofing to Caerphilly?

Yes. We deliver across Caerphilly, including CF83, CF82, CF37. Caerphilly is inside our standard mainland delivery area. Send your list or call 0800 088 6341 and we will price it delivered to your postcode.

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

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

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.