Damp Proofing

We use two main types to control ground water ingress where any of the property is fully or partially underground.  It can be necessary to combine more than one type in order to complete the waterproofing and minimise risk.

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- Cementitious Tanking

This type is a barrier protection and can be applied either internally or externally to resist any water or moisture that might be trying to enter the building.

Type 'A'  BS8102:2022

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- Air Gap Membrane

This type works by collecting and diverting any water ingress to soak away into the property's existing surface water drainage.

Type 'C'  BS8102:2022

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If we establish your existing damp proof course has failed, or the property does not have one, we can control rising damp by installing a chemical damp proof course. 

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Several solutions have evolved over the last 70 years to address this problem and most are still in use.  Today our best options are Diffused Resin (Koster Crisin 76), D.P.C Rods and D.P.C Creams (Dryzone products from Safeguard Europe LTD).

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D.P.C = Damp proof course

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Penetrating Damp is a significant problem in buildings of solid wall construction.

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We will identify the ingress and tailor a solution to each case.  Solutions we will consider include external re-pointing, paint removal, application of water repellant, internal waterproofing or re-plastering.  

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Following the installation of a remedial damp proof course or sterilisation of Dry Rot, correctly re-plastering the area is essential.  The plaster must be capable of holding back both salts found in the original mortar and salts from the ground brought up by any rising damp. 

If the plaster is not able to control these salts, they will migrate to the plaster surface, spoil the decoration and may cause damp patches to appear.
 

The most significant points of storm water ingress in solid wall construction are cracks in the render or mortar joints. Even the smallest hairline crack can allow a surprising amount of water ingress.

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If the cracks are suitable for repair (subject to survey), we utilise a resin injection system. Once the resin is set, the crack is filled on the face of the wall with a normal external filler.

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The above works are not intended to be a repair for structural defects or movement cracks due to subsidence.

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An epoxy resin coating is a treatment to prevent moisture rising into and damaging floor finishes. These products can be applied to the surface of the floor where an existing membrane has failed or is absent. 

This treatment is specified subject to tests and investigation to ensure the surface is suitable to receive these products.

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