Damp Proofing

Rising Dampness can develop within walls due to the lack of an effective damp proof course or the omission of damp proofing during earlier construction.

In most cases, rising dampness is identified by moisture readings obtained around the base of the walls, however in more severe cases of prolonged dampness, visible damp patches may appear along with hygroscopic salts on the wall surfaces.

Knox Developments remedial damp proof course treatment involves installing a chemical damp proof course using injection fluid or dpc cream, which is installed by pattern drilling the appropriate mortar course at the base of the wall and injecting the water proofers under pressure into the masonry substrate.

Our chemical injection process, is low odour and cures within the masonry wall to form an impervious barrier to rising dampness, which prevents moisture rising from the ground into the treated walls. Adjacent abutting walls are isolated using a vertical damp proof course.

Used in conjunction with our specialist waterproof rendering system, the damp proof course system, provides a reliable, highly effective and cost effective method for the treatment of rising dampness. Specialist replastering of the walls following the damp proof course installation is essential. The installed damp proof course prevents moisture continuing to rise into the walls, however, due to the effects of the ground salts, the walls will not dry out effectively unless the existing wall plaster is removed and replaced using a salt retardant rendering system, such as Kenwood's premix waterproof rendering system.

Where high ground levels exist, our structural waterproofing or tanking system may also be required in conjunction with the chemical damp proofing. We offer a comprehensive service to home owners and property professionals or can work with your builder to undertake the specialist damp proofing as part of their programme of works. Treatment is undertaken by our own skilled workmen.

Typically, treatment involves removal of the skirting boards and wall plaster on the walls to be treated. The wall plaster is removed to a height of approximately one metre, however depending on the salts within the masonry and several other factors, the height of the necessary replastering may be increased and will be individually specified once our surveyor has carried out an inspection of your property. Replastering above one metre high is not uncommon.

The damp proof course is installed into the walls by pattern drilling the masonry at the base of the wall and injecting a specially formulated solution of siliconate injection fluid, until the entire depth of the wall is fully impregnated.

The walls are then replastered using a premix waterproof rendering system, which is purpose designed to provide a salt retardant, waterproof render to combat the effects of the ground salts in the masonry and provide a dry internal finish.

Following the application of the waterproof rendering system, we will apply top coat skim plaster to provide a smooth finish.

Our installations are carried out to the highest standards and are covered by the most comprehensive guarantees available.