Damp Proofing & Membranes delivery in Grantham

Which damp proofing can you order in Grantham?

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

Sizing your order

An extension in Grantham with 20 m of cavity wall needs DPC in both leaves: about 2 rolls in 30 m lengths once laps are allowed for. A 20 m² floor slab needs about 23 m² of DPM including laps, which is 1 roll of 4 × 25 m sheeting.

Delivery to Grantham: what helps

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

• Have someone on site for the delivery if you can, or agree a safe drop point with us in advance.
• Clear a level area for pallets, ideally on boards, so materials stay out of standing water.
• Pallets left on a pavement can block the footway, so plan a drop point inside your boundary where you can.

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.

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.

Your questions answered

Is there a minimum order for delivery to Grantham?

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 deliver damp proofing to trades and homeowners in Grantham?

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.

Do you supply cavity trays?

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