Damp Proofing & Membranes for March, delivered to site

Damp Proofing & Membranes we supply in March

• DPM sheetingHeavy-gauge polythene membrane under concrete floors.
• Liquid DPM and tankingCoatings for screeds and below-ground walls.
• Cavity trays and stop endsTo direct water out of the cavity over openings.
• Radon barriersGas-resistant membranes for areas that need radon protection.

How much will you need?

An extension in March with 28 m of cavity wall needs DPC in both leaves: about 3 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.

Choosing 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 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.

Getting damp proofing onto your March site

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

• Give us the full postcode for the drop point; deliveries around PE15 are priced to the exact address.
• Weight limits on bridges or private roads near the site matter for larger lorries, so mention any you know of.
• Pallets left on a pavement can block the footway, so plan a drop point inside your boundary where you can.

Ordering damp proofing for March: FAQs

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.

Do you supply cavity trays?

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

How soon can damp proofing be delivered in March?

We confirm the delivery date when we price your order, before you commit. It depends on the product, the quantity and whether it is a stock line or made to order.

Can you deliver damp proofing to a site with restricted access in March?

Usually, yes. Tell us about the access when you ask for a price and we will plan the vehicle and offload, or say if a smaller vehicle is needed.