Damp Proofing & Membranes for Carshalton, delivered to site

Damp Proofing & Membranes we supply in Carshalton

• DPM sheetingHeavy-gauge polythene membrane under concrete floors.
• DPC rollsPolymer and bitumen damp-proof course in standard wall widths.
• Radon barriersGas-resistant membranes for areas that need radon protection.
• Liquid DPM and tankingCoatings for screeds and below-ground walls.
• Weep ventsFor drainage and ventilation at the base of cavities and over trays.

Delivering damp proofing in Carshalton

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

• Pallets left on a pavement can block the footway, so plan a drop point inside your boundary where you can.
• Deliveries are to the kerb, drive or within crane reach; ask if materials need to go further.
• Weight limits on bridges or private roads near the site matter for larger lorries, so mention any you know of.

Working out quantities for your Carshalton job

An extension in Carshalton with 20 m of cavity wall needs DPC in both leaves: about 2 rolls in 30 m lengths once laps are allowed for. A 30 m² floor slab needs about 34.5 m² of DPM including laps, which is 1 roll of 4 × 25 m sheeting.

Things to check before you order

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.

Common questions from Carshalton

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.

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.

Can I add other materials to my Carshalton 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.

Do you deliver damp proofing to Carshalton?

Yes. We deliver across Carshalton, including SM5, SM6, CR4, SM2. Carshalton is inside our standard mainland delivery area. Send your list or call 0800 088 6341 and we will price it delivered to your postcode.