Whenever rising damp is diagnosed, it is important to have the condition correctly treated, as failure to do so can cause damage and devaluation to any property.
It is not sufficient to simply cover up the problem with a special paint in the hope that the problem will go away. Only by preventing the dampness rising up the wall in the first place can rising dampness be adequately controlled.
Up until now, the most widely employed method of achieving this has been to inject water-repellent fluids into the wall under pressure.
Although this method has proven to be effective, it is known to have a number of disadvantages; for example, it introduces large amounts of liquid carrier into the wall, prolonging the drying out period. The process is also very slow and operator dependent.
The Dryzone System is fast, clean and effective
Dryzone is a revolutionary new material for the control of rising damp. Dryzone comes in the form of a water-repellent cream packed in a 600ml foil cartridge to minimise environmental impact. The Dryzone cream is introduced by means of a simple applicator gun into a series of holes drilled into the mortar course. Once the Dryzone is installed, it uses the moisture contained in the damp wall to diffuse where it is most needed before curing to form a water-repellent resin.
Dryzone has many advantages over conventional chemical injection systems
- Quick to install – no “double drilling”, no waiting for fluid to soak in under pressure.
- Easy to install – less scope for operator error.
- Concentrated formulation (over 60% active ingredient) – does not introduce large volumes of liquid carrier into the wall.
- Low hazard – non-caustic, non-flammable not injected under pressure.
- Spillage and mess virtually eliminated – no problems with fluid flooding through party walls.
- Consistent application rate – easy to estimate the amount of material that will be required.
- Does not require an electric DPC pump – can be used in situations where power is not available.
Dryzone is the result of an extensive in-house research and development program. This involved the screening and testing of hundreds of potential formulations.
These tests demonstrate that Dryzone offers a higher degree of protection against rising damp than the chemical injection systems that it has now replaced.
Confirmation of Dryzone’s efficacy is the Agrëment Board Certificate No 97/3363 awarded for application in both stone and brick construction.
The Dryzone system is recognised by both the Guarantee Protection Trust (GPT) and the Property Guarantee Association (PGA) as an acceptable method of rising damp treatment. The GPT and PGA are the industry leaders in the provision of independent, long-term guarantee insurance for remedial treatments.
Dryzone was designed with the environment in mind. Its concentrated formulation means that less product has to be transported to the point of use and minimal packaging means less wastage. The formulation is based on silicones. These are derived from quartz and are used to manufacture a wide variety of products from medical instruments to cosmetics and sealants.
Dryzone is water-based and contains no hydro-carbon solvents.
Step by Step Guide
Installing Dryzone damp-proofing cream is extremely quick and easy. The step-by-step guide on this page outlines how to use Dryzone to damp-proof a standard brick wall. For information on damp-proofing other types of walls, such as random stone walls, consult our guide to “Rising Damp and its Control,” available from our brochure download page.
1. Drill Holes
Drill holes at 120mm centres along the mortar course of the walled to be damp-proofed using a 12mm drill-bit. Holes should be drilled to a depth slightly less than the thickness of the wall – see full instructions for suggested drilling depths for common wall thicknesses.
2. Prepare Gun (1)
Unscrew the nozzle attachment from the Dryzone gun and insert the Dryzone cartridge.
3. Prepare Gun (2)
Pierce the Dryzone cartridge using a sharp knife.
4. Inject Dryzone damp-proofing cream
Replace the nozzle and screw tight. Insert the nozzle of the Dryzone gun into the full depth of the first pre-drilled hole. Squeeze the gun trigger and back-fill the hole to within one centimetre of the surface. When damp-proofing cavity walls, make certain that the holes in each leaf are filled.
5. Finish the job
Fill the rest of the holes with Dryzone damp-proofing cream in the same manner. When treating plastered walls, the plaster will have to be hacked off and replaced according to the specification described in our guide to “Rising Damp and its Control,” available from our brochure download page.