Damp-Proofing Materials: Choose the Right Treatment
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A damp patch is a reason to investigate, not a product specification. Before buying damp-proofing materials, establish where the moisture is coming from and which part of the building needs attention. A treatment for rain-soaked brickwork has a different job from an injected damp-proof course or a membrane beneath a floor.
This guide helps you navigate our damp-proofing and building treatments and build a shopping list around the work you actually need.
Start with the source of moisture
Check plumbing, gutters, downpipes, roof junctions, external ground levels and the condition of masonry before choosing a treatment. Condensation, penetrating rain and moisture rising through masonry can need different responses, and more than one cause may be present. A handheld moisture reading alone is not enough to specify a new DPC. If the cause is unclear, arrange a building assessment before purchasing a treatment system.
Which damp-proofing material does which job?
| Job | Product route | Where to start |
|---|---|---|
| Reduce rain absorption through suitable exterior masonry | Breathable masonry water repellent | Stormdry Masonry Protection Cream |
| Create a remedial DPC after rising damp is confirmed | Injection cream or pre-dosed rods | Dryzone 310ml cream or Dryrod 10-pack |
| Install a physical barrier within new masonry | Damp-proof course roll | TIMCO DPC rolls |
| Provide a sheet moisture barrier within a specified floor build-up | Damp-proof membrane | TIMCO Toughsheet DPM |
| Waterproof a specified masonry or concrete surface | Tanking system | Toptank tanking slurry |
| Renew wall finishes following damp treatment | Renovation plaster or a specified plasterboard system | Dryzone Fast-Set Plaster or Drygrip adhesive |
Exterior walls: repair first, then consider protection
A wall coating cannot replace missing pointing, a defective flashing or a leaking gutter. Once defects have been addressed, a suitable masonry cream may be part of a rain-protection plan. Check the substrate and its existing finish: a product intended to penetrate porous masonry needs a suitable exposed surface. Our Stormdry coverage and application guide explains the buying checks for this route.
Rising damp: choose the treatment and the finish together
Where a remedial DPC is specified, compare pack format and application equipment as well as the price on the page. A 600ml foil pack needs different equipment from a small cartridge. Also budget for any work to contaminated or damaged plaster; buying the injection material is only one part of the job.
Read Dryzone cream versus Dryrod rods and our replastering guide before assembling your order.
Floors and below-ground spaces need their own specification
DPC, DPM and tanking are not interchangeable names. A sheet floor membrane needs a plan for joints, edges and connections to the wall barrier. A basement project needs a waterproofing design that deals with the whole space, including junctions and any drainage requirements. Do not assume that adding a coating to one visible patch will address the entire water path.
For the sheet-material options, use our DPC versus DPM guide to compare roll dimensions, membrane thickness and jointing accessories.
Before you order
- Write down the confirmed problem and the proposed treatment system.
- Measure wall length, thickness or surface area as appropriate.
- Check the selected variant, pack quantity and application equipment.
- Include preparation, jointing and finishing materials from a compatible specification.
- Check current availability on each product page before arranging the work.
Browse damp-proofing and building treatments to compare the products, then follow the current manufacturer instructions for the exact material supplied.
Technical reference: Safeguard guidance on assessing dampness.