A damp course may fail due to any of the following defects.

• A build-up of soil, paving or concrete to a level breaching the damp-proof course.
• Render coats or mortar that extend across the line of the DPC.
• Blockages in wall cavities that build up to bridge the DPC.
• Structural movement or building alterations that break the continuity of a physical damp course.

In the absence of a working DPC, walls can soak up groundwater. The excess dampness can cause wooden floors and skirting boards to rot. Wall plaster may deteriorate, and decorated finishes may peel or stain.

Thankfully, damp proofing has never been easier. Our BBA-approved damp-proof injection cream contains a powerful water-repellent. Inject the cream into the walls at regular intervals. It cures to form a chemical DPC that stops dampness from rising in the wall.

What is Damp Proofing Cream?

Damp-proof cream is an emulsion formula on a silane base. Silane is a silicone-containing compound that deeply penetrates concrete and mortar. It offers excellent water repellency.

How Does Damp Proof Cream Work?

The silane reacts with the mortar when the cream soaks into a wall. It bonds within the mortar's pore structure and lines the pores. The damp proofing formula cures to form a water-repellent barrier. The chemical damp-proof course repels water, offering long-lasting protection from rising dampness.

How do you Treat Rising Damp with Damp Proofing Cream?

Treat walls with rising dampness problems using a damp-proof injection cream. Drill a series of 12 mm holes along a mortar bed joint. The joint must be 150mm higher than the outside ground level. The holes should be at most 120 mm apart and preferably closer. They must extend 90% of the depth of the wall. Load the cream into a cartridge gun or low-pressure pump. Inject a BBA-approved damp-proofing cream to fill each hole.

The DPC cream will slowly diffuse along the bed joint. It may take a month or two to cure and become fully effective. After that time, residual moisture above the damp course will begin to evaporate.

Once the wall has dried, replace all damp and salt-laden plaster per BS 6576. Consider using a damp-proof membrane if you need to replace the wall plaster before the wall is dry. Studded membranes allow early replastering whilst the masonry behind them dries.

What are the advantages of Damp Proof Injection Cream?

• Quick and simple installation. The DPC injection creams are up to 4 times faster than high-pressure injection systems. Effortless low-pressure application makes damp proofing easy.
• Clean and safe handling. The low-hazard silicone emulsion cream is non-caustic and non-flammable. It permits trouble-free disposal of containers. Low-pressure injection eliminates spillages and mess.
• Low-cost damp proofing. No special equipment is required. Our damp-proof cream is supplied in various containers and kits to suit projects of all sizes.
• Reliable damp control. Testing by the British Board of Agrement and BBA Approved.

Twistfix supplies the best damp-proofing products at trade prices. We offer damp-proof cream in various container sizes. We have a damp-proof injection kit to suit all pockets. Call our helpline for expert technical advice on damp-proofing cream and rising damp treatment.