Damp Proofing & Membranes for Barnet, delivered to site

Damp Proofing & Membranes available for Barnet delivery

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

Getting damp proofing onto your Barnet site

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

• Mention any overhead cables, low branches or narrow gateways, because they decide whether a crane offload is possible.
• Weight limits on bridges or private roads near the site matter for larger lorries, so mention any you know of.
• Give us the full postcode for the drop point; deliveries around EN5 are priced to the exact address.

Picking the right product

DPC width

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

Laps and joints

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

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.

Estimating your damp proofing

An extension in Barnet with 16 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.

Damp Proofing & Membranes in Barnet: questions

Is there a minimum order for delivery to Barnet?

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.

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.

Can I add other materials to my Barnet 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.