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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.

Damp Proofing Cream - 380 DPC

£17.70 inc. VAT

You save £1.20Valid until 01/01/1970

Damp proof cream in 380ml DIY cartridges. Stop damp walls with an advanced chemical damp proof course. No specialist equipment needed. Simple DPC injection treatment using caulking gun to treat up to 1.9m of double leaf brickwork.

Damp Proofing Paint

£43.80 inc. VAT

You save £12.25Valid until 01/01/1970

General-purpose, quick drying damp proof paint that dries to form a water-proof membrane. An effective penetrating damp treatment for wa­ter­pro­ofi­ng wall surfaces. 5L

Damp-Proofing Membrane

£129.60 inc. VAT

You save £10Valid until 01/01/1970

Heavy duty damp proofing membrane with air gap and mesh face. Ideal wall lining following DPC injection. Enables the direct application of wall plaster on damp walls within the drying out period. 3 sizes.

Electro Osmotic DPC Kit

£335.40 inc. VAT

You save £122.75Valid until 01/01/1970

Lectros electro osmotic damp proof system. A sci­en­ti­fic­al­ly proven rising damp treatment using osmosis. Ideal damp treatment for thick brickwork and rubble-filled stone walls.

DIY Damp Proofing Cream - 380 DPC Kit

£129.60 inc. VAT

You save £46.25Valid until 01/01/1970

Easy to use DIY damp proofing kit. Includes everything you need to provide an effective damp proof course in walls. This kit treats up to 30m of single leaf walls or 15m of double leaf brickwork.

Masonry Water Repellent

£26.10 inc. VAT

You save £10.75Valid until 01/01/1970

Water repellent surface treatment for wall suffering from penetrating damp. Prevents moisture migrating through masonry walls and brickwork facades. Costs much less than weather resistant render products. 5 Litres

Damp Treatment - All Cure Total

£126.00 inc. VAT

You save £27.75Valid until 01/01/1970

A universal damp treatment kit for treating damp walls above ground level. This 3 in 1 damp treatment system will stop rising-damp block penetrating damp and combat con­den­sati­on. Options for 5m and 10m of wall

Damp Proof Injection Fluid

£47.94 inc. VAT

You save £7.55Valid until 01/01/1970

A BBA Approved damp proof injection fluid concentrate. Inject damp proof liquid at the rate of 3 litres per metre run of 230mm thickness wall for the treatment of rising damp in walls 3.6L dilutes to make 25L

DPC Injection Cream - Damp Cure 6000 Kit

£189.00 inc. VAT

You save £67.75Valid until 01/01/1970

Damp proof treatment in a low cost and easy to use DPC injection kit. Includes sufficient Damp-Cure cream to damp proof up to 60m of 110mm single leaf wall or30m DPC for 225mm double leaf wall.

Anti-Con­den­sati­on Paint

£53.94 inc. VAT

You save £14.80Valid until 01/01/1970

Anti-con­den­sati­on paint for inhibits condensation by absorbing damp and moisture and improving insulation. The paint has a porous structure which absorbs condensation on ceilings and inside wardrobes. Moisture-absorption capacity increases with paint

Damp Check - Mesh Membrane Kit

£126.00 inc. VAT

You save £12Valid until 01/01/1970

Damp Check Kit provides an effective moisture barrier when isolating damp walls from internal finishes. The air gap behind the damp-proof membrane allows walls to breathe and water to drain. 10m Kit

Damp Seal Water Repellent Cream

£83.40 inc. VAT

You save £20.25Valid until 01/01/1970

Damp Seal masonry water repellent is a high strength silane cream treatment that waterproofs brick and stone facades including walls, bridges and tunnels. 3kg Tub

Damp Proof Cream - Dampcure 1000 Kit

£255.00 inc. VAT

You save £52.75Valid until 01/01/1970

Damp proof cream kit for Builders. This 8Litre DPC injection pack contains the products needed to provide a chemical DPC to stop rising damp in walls. This kit treats up to40m of double leaf / cavity wall

Epoxy Floor Seal Paint

£51.00 inc. VAT

You save £11Valid until 01/01/1970

Paint-on liquid damp proof membrane for new or existing floors. A two-part high hardness, abrasion resistant and waterproof epoxy coating. 2.5G or 5KG

Tanking Membrane 20m

£143.40 inc. VAT

You save £30Valid until 01/01/1970

A cost effective po­lyp­ro­pyle­ne tanking membrane with 2mm studs formed on one face of the product and a mesh welded to the other side. Available at a special trade price in a 1m x 20m or 2m x 20m roll

Penetrating Damp Treatment

£93.54 inc. VAT

You save £39Valid until 01/01/1970

Water repellent surface treatment for protection against penetrating damp. Prevents water migrating through brick and masonry façade walls. Costs much less than storm-proof render products. 25L

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 damp 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 damp 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 damp 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 to treating rising damp 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 dampness from penetrating or rising through the walls into the interior of homes. Twistfix help to make the process quick, easy and cost effective.

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