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Forest Dampbusters – Specialist Consultants & Contractors in the diagnosis and control of Rising Damp, Woodworm & Dry Rot.

Damp-proofing and timber treatment in the Forest of Dean and Wye Valley
Freezteq-brought to you by Forest Dampbusters
Rising damp and how to cure it.
In most external walls the foundations are well below ground level and the lowest part of the wall will often be in hydraulic contact with ground having a high water content and the wall materials will usually be finer-pored than the soils and will draw water from the soil to attain relatively high water contents.
Water rises up the wall by capillary action and as there is virtually no evaporation below ground level then the water content of the wall at just below ground level can be close to saturation and if there is no damp-proof course( or the existing d.p.c. is defective ) then water will rise up the brickwork by capillary action.
This damp can rise to height of around one metre but it can vary due to evaporation from the wall (inside and outside) and the rate of water uptake from the ground.
There are various ways to control rising damp but one of the most popular methods, especially in the Forest of Dean, is to inject a chemical damp-proof course through pre-drilled holes into the walls and this is intended to form a water-proof barrier to water rising from the ground. However this injected damp-proofing system rarely works properly on stone built walls in the Forest as the fluid will often run away in the voids and rubble in-fill of stone walls. Even in brick walls pressure injected damp-proofing systems also have a poor track record as they do not form an impermeable damp-proof course because of a process known as ‘viscous fingering’ where the injected fluid fingers through the brickwork to find the path of least resistance and this leaves sections of brickwork which are left unprotected and therefore still subject to water rising from the ground.
However there is an effective system of controlling rising damp in stone or brick built houses and cottages in the Forest of Dean. Freezteq is a frozen damp-proofing system where ice sticks of damp-proofing fluid are inserted directly into mortar joints. These then gradually melt and saturate the wall with the slow diffusion process ensuring that all the pores and fissures within the wall are lined with the damp-proofing solution.
For more details about the advantages of the Freezteq frozen damp-proofing system please call us on 01594 8237300 or email us at
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If you need free, impartial advice about rising damp, woodworm and dry rot in the Forest of Dean then please call Forest Dampbusters
Click to Call: 01594 837300