The most popular method of damp-proofing with clients of Damp and Mould Control is a diffusion process using frozen damp-proof ice sticks using the Freezteq process. This transfusion method of damp-proofing is widely acknowledged by scientists and professionals within the damp-proofing industry as being the most effective means of retro-fitting a chemical damp-proof course.

It is a patented method of treating a porous structure in which a frozen rod or pellet of siliconate solution which is liquid at ambient temperature is placed in a bore in the structure and allowed to thaw. This slow melting of the siliconate treating solution allows it seep gently into the porous structure. This method has been used with great success to introduce aqueous solutions of sodium or potassium methyl siliconate into masonry walls to form an effective damp course and therefore prevent the upward passage of rising dampness. The use of Freezteq frozen damp-proofing rods was awarded Agrément Certificate No. 81/827 by the British Board of Agrément and has been used successfully in thousands of properties since it was invented in 1965.

A silicon based water repellent liquid is introduced into the base of the walls via drilled holes which are normally into the mortar joint. The siliconate absorbs or ‘transfuses’ into the capillaries of the masonry; this lines the capillaries with a hydrophobic layer which reverts capillary attraction therefore controlling rising dampness. The silicone material does not block the capillaries; the masonry can still ‘breathe’ , allowing moisture to evaporate from walls. The silicon water repellent used in the transfusion system is water based, non-toxic and it is completely inert once cured and has no deleterious effect on the masonry into which it has been introduced.

Due to the installation process generally being via drilled holes in the mortar joint there is minimal disturbance of the actual stone or brickwork and once installed the holes can be re-pointed with negligible aesthetic impact.

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