Twistfix

Damp Proofing

Damp proofing is a means to stop moisture from an external source from being transmitted through walls and into the inside of our homes.

If a house has a damp problem then it is vital to establish the precise cause before establishing the appropriate remedial treatment.

The most common causes of excess dampness in buildings are:

  • Condensation - Sorbent moisture from condensed water vapour that is deposited when humid air makes contact with a cooler surface.
  • Penetrating damp - Capillary moisture soaking through a porous wall as it is absorbed from an external source
  • Rising damp - Capillary moisture soaking upwards into a porous wall as it is absorbed from a ground source.

It is imperative to establish the precise cause of the moisture and to remove its source or to provide a water repellent layer to prevent humidity from being transmitted into the home.

  • Condensation occurs when air moisture content is too high in relation to temperature. Consequently condensation can be avoided by correcting the balance between humidity generation and air or surface tempe­ratures.
  • Penetrating damp can avoided by regular building maintenance such as repairing leaking gutters, filling cracks and repointing etc.
  • Rising damp can be alleviated by removing soils or cavity blockages that breach the damp proofing course. Where a DPC is missing or is defective then remedial damp treatment can be used to combat capillarity.

A damp proofing course (DPC) is a waterproof layer that is installed 150mm above ground level during the construc­tion to prevent ground water from the foundations into the home.

Brick stone and mortar building products are each porous to various degrees. Without an effective DPC some water may be absorbed into porous through the process of capillarity. This capillary action is often referred to as rising damp and can be detrimental to your home. The amount of water absorption that can affect a wall having no protection is determined by ground moisture levels and the balance between capillary forces, gravity and evaporation. The main controlling factors are the rate of suction of the water into the wall and the ease at which dampness can evaporate from it.

Modern buildings with cement mortars have lower water-absorption rates than older buildings with lime mortars. It therefore follows that damp control treatment is more often required in older properties.

Chemical Damp Proofing

A very common method for treating rising damp in homes with traditional brick walls is the insertion of a Chemical DPC Injection Treatment. A silicone-based proofing cream is injected into a series of holes that are formed along a mortar bed joint. The cream is absorbed into the pores of the masonry and lines them with a silicone coating that limits capillarity and forms a chemical damp proof course. Once the DPC injection treatment is complete and the source of the dampness cut off then the wall will begin to dry through continued surface evaporation. Thin walls will dry quicker than thick walls and drying walls may leave residual salt deposits

DPC injection systems are less effective in coun­te­racting augmenting moisture where mortar joints are not continuous along the length of a wall or through the entire depth of it.  A more effective method of treating rising damp in houses having random stone or rubble filled walls is through Electro-osmosis Damp Proofing. An electric DPC system uses a series of anodes placed in the wall to provide a small positive charge through it in order to repel free water molecules. A cathode that is buried in the ground attracts the positively charged molecules. As electro osmotic forces are substan­ti­ally greater than those of capillarity then free water molecules are forced from the anodes in the wall and down to the cathode in the ground

In addition it is important to damp proof your home against penetration damp that may be entering the building through walls or roofs. Pore-lining façade cream, damp proofing paint and water­pro­ofing membranes all have a role to play in keeping the home free from water penetration.

Correctly selected damp proofing products will succes­sfully stop humidity from penetrating or rising through the walls into the interior of homes. Twistfix help to make the process quick, easy and cost effective.

25–36 of 43 items
View:
Prices:
Sort by:
Damp Proofing Injection Cream – Dampcure 1000

Damp Proofing Injection Cream – Dampcure 1000

Damp-proof cream in 1 litre cartridges. A reliable damp injection treatment using a large caulking gun and nozzle to stop damp in walls. This cartridge treats up to 5m of double leaf walls
RRP
£29.70
Price incl. VAT
£21.00
DPC Injection Gun 1L

DPC Injection Gun 1L

Extra large heavy duty DPC injectiongun for rising damp treatment using Damp-Cure chemical damp proofing cream supplied in 1000ml cartridges
RRP
£50.40
Price incl. VAT
£30.90
Silane Water Repellent Facade Cream

Silane Water Repellent Facade Cream

Silane water repellent is a high strength damp proofing cream for water­pro­ofing building facades, monuments and reinforced concrete structures including bridges, tunnels and piers. 3kg Tub
RRP
£107.70
Price incl. VAT
£83.40
Rising Damp Kit

Rising Damp Kit

Rising damp kit comprising 3 litres of DPC injection cream and 5 litres of plastering additive. This kit has everything needed to treat rising damp along 30m of single leaf wall or 15m for 9" walls
RRP
£143.40
Price incl. VAT
£94.80
Rising Damp Treatment - Dampcure 3000 Cream

Rising Damp Treatment - Dampcure 3000 Cream

DPC cream in a 3 litre tamper proof pail for the treatment of damp walls. Advanced chemical damp course injection applied via a low pressure pump and nozzle. This tub treats up to 15m of double leaf wall
RRP
£83.88
Price incl. VAT
£57.00
Chemical Damp Proof Course Wholesale

Chemical Damp Proof Course Wholesale

DPC cream products are now available bulk packaged for the damp proofing specialists in 380ml, 1000ml & 3000ml containers. Also available in our best selling 8L damp-proof cream in DPC injection box
RRP
£712.80
Price incl. VAT
£447.12
Ultracure DPC Cream

Ultracure DPC Cream

Ultracure DPC cream in 380ml cartridges. Treat damp walls with advanced chemical damp proof course products. No specialist equipment needed. Simple DPC injection treatment using caulking gun.
RRP
£17.70
Price incl. VAT
£11.88
Slimline 3 Floor Membrane

Slimline 3 Floor Membrane

A low profile 3mm cavity drain waterproof membrane for sealing damp concrete floors without extensive surface preparation. Size: 40m2
RRP
£271.20
Price incl. VAT
£161.40
Baseline Mesh Membrane Kit

Baseline Mesh Membrane Kit

Mesh membrane kit in 3 sizes with everything needed for water­pro­ofing wall surfaces. These waterproof tanking membranes include a mesh face for direct application of plaster or dabs for plaster­board.
RRP
£334.80
Price incl. VAT
£213.48
Wall Waterproof Membrane – Baseline 8

Wall Waterproof Membrane – Baseline 8

Waterproof membrane for tanking walls and floors. Cavity drain membranes in 40m2 & 48m2 rolls for basement water­pro­ofing. Leaves surfaces ready for dry wall lining or floor screeds. Sizes: 40m2 and 48m2
RRP
£214.80
Price incl. VAT
£123.00
Roof Sealing Paint - Acrylic Coating

Roof Sealing Paint - Acrylic Coating

A paint on roof sealant and waterproof coating. This roof repair paint waterproofs instantly to seal leaks in roofing slates, flat roofs, asbestos, concrete, lead bays, valleys & gutters - 5L Grey
RRP
£78.48
Price incl. VAT
£65.40
Osmosis Damp Proofing Pro

Osmosis Damp Proofing Pro

The professional osmosis damp course kit includes a digital monitor that displays the electrical charge carried through the wall by moisture. Wet walls will conduct greater current than drier walls. 25m Pro Kit
RRP
£724.50
Price incl. VAT
£479.99