Freezteq frozen damp course

Diffusion and Freezteq frozen damp proof courses

The transfusion method was first used by Peter Cox but they have now stopped using this system in favour of the gels and cream dpc systems but the transfusion method of filling bottles with damp proofing fluid. This original method of installing a dpc was known as the Transfusion system; this was patented, gained Agrément certification and has been listed as a valid method in BS6576 since the publication of the standard. 

Peter Cox diffusion method of damp proofing

Cross section of wall showing effectiveness of diffusion damp proofing

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.

At London Damp & Mould Control we have opted for a similar diffusion process but instead of having to top-up bottles we use a frozen damp proof course ( Freezteq) which is widely acknowledged by scientists and professional throughout the remedial industry as being the most effective form of damp proofing available today.

The slow diffusion process of the Freezteq frozen ice-sticks ensures that a waterproof barrier is formed across the whole section of a treated wall. Frozen ice-sticks of Freezteq damp proofing fluid are inserted into pre-drilled 22mm diameter holes.

The ice-sticks then melt gradually and the siliconate damp proofing fluid transfuses into the capillaries of the masonry, lining the pores of the brickwork or stone with a hydrophobic layer which reverts capillary action and therefore prevents further rising dampness.After the initial ice-sticks have melted further frozen ice-sticks are inserted a further three to four times to ensure that a continuous damp proof barrier is formed.

The silicone material does not block the capillaries and therefore allow the masonry to breathe and the structure of the wall remains unchanged. The water repellent used in the transfusion process is non-toxic and completely inert once cured and has no deleterious effect on the masonry into which it has been introduced.

For a free survey and estimate for any Freezteq damp proofing works in Notting Hill please call 020 7458 4195.