Damp Proofing & Membranes delivered to Belfast

Which damp proofing can you order in Belfast?

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

Sizing your order

An extension in Belfast with 24 m of cavity wall needs DPC in both leaves: about 2 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.

Getting the right damp proofing

Laps and joints

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

DPC width

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

In Northern Ireland building work follows the Building Regulations (Northern Ireland), with guidance in the Technical Booklets, and applications go to the council's building control team.

Planning the drop in Belfast

Rolls are light enough to travel with a mixed load and are handed off at the kerb. Deliveries to Northern Ireland include a sea crossing, so we quote each order individually.

• For a phased build we can split the order so materials arrive as each stage starts, which keeps the site clear.
• In summer Belfast gets around 17h 17m of daylight, but early deliveries still beat the traffic and give the longest working day.
• If neighbours share the access, it helps to let them know a lorry is coming.

Your questions answered

Is there a minimum order for delivery to Belfast?

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.

Do you supply cavity trays?

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

Do you deliver damp proofing to Belfast?

Yes. We deliver across Belfast, including BT1, BT2, BT7. Deliveries to Northern Ireland include a sea crossing, so we quote each order individually. Send your list or call 0800 088 6341 and we will price it delivered to your postcode.

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.