Damp Proofing & Membranes for St Albans, delivered to site

Damp Proofing & Membranes available for St Albans delivery

• DPC rollsPolymer and bitumen damp-proof course in standard wall widths.
• DPM sheetingHeavy-gauge polythene membrane under concrete floors.
• Cavity trays and stop endsTo direct water out of the cavity over openings.
• Liquid DPM and tankingCoatings for screeds and below-ground walls.

Planning the drop in St Albans

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

• Keep cement, plaster and boards dry: have a tarpaulin or a garage space ready before they arrive.
• 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 AL1 are priced to the exact address.

Working out quantities for your St Albans job

An extension in St Albans with 16 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.

Getting the right damp proofing

DPC width

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

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.

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

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.

Is there a minimum order for delivery to St Albans?

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 soon can damp proofing be delivered in St Albans?

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.

Where does the DPC go?

Usually at least 150 mm above outside ground level, linked to the floor DPM.