Dryzone Dampproofing Range

Dryzone Dampproofing Range

Rising damp occurs when groundwater rises up through walls, floors and masonry. Bricks and mortar can be very porous and contain many fine capillaries, through which water can rise. This can result in visible damp patches, salt-contamination and crumbling plaster on interior walls.

Most modern properties are built with a damp-proof course, commonly referred to as a DPC. Some properties, however, were built with no DPC, or the original has failed, meaning that rising damp can occur and it is necessary to make remedial repairs.

The Dryzone System range of products is designed to enable you to eliminate rising damp in these situations and renovate the interior walls that have been effected by it. Each product in the Dryzone System range is part of a system designed to enable the user to solve the problem of rising damp from start to finish.

How Does the Dryzone System Work?

How Does the Dryzone System Work?

Stop the Damp – With Our Remedial Damp-proof Courses

In order to stop the progress of rising damp through a wall, it is necessary to create a new DPC. The most practical and effective way to do this is to make an existing mortar course into a waterproof barrier, using high strength damp-proofing products. There are two product choices for this purpose within the Dryzone System:

  1. Dryzone Dampproofing Cream 
  2. Dryrod 

Replaster – Using One of Our New Replastering Systems

Once a wall has been treated, it will begin to dry out but if the wall has been contaminated by groundwater salts then complications can arise, often leading to the appearance of damp patches, on an otherwise dry wall. Other issues that can arise include efflorescence forming at the plaster surface, causing decorative spoilage, and salts crystallising just underneath the plaster surface, causing it to crumble and blister.

This means that it is often necessary to replaster the affected wall after the treatment of rising damp. Standard plastering materials, such as gypsum plaster, are not suitable for replastering a salt-contaminated wall. Any salts that are still present in the building materials of the wall can migrate into the new plaster coat and symptoms of damp may reappear.

There are two recommended specifcations in the Dryzone System for replastering salt-contaminated walls:

Dryzone Renovation Plasters

Dryzone Renovation Plasters: This specification uses a modern formulation of breathable damp and salt-resistant plaster that is able to be applied with traditional plastering techniques. Unlike the sand and cement renders that are often used, Dryzone Renovation Plasters are non-destructive to the underlying masonry, do not require gauging and present a warm surface.

For older buildings, Dryzone Hi-Lime Renovation Plaster is also available. The plaster blend which contains a high proportion of natural hydraulic lime and calcite is highly breathable, quick drying and suitable for heritage applications.


Dryzone Express Replastering

Dryzone Express Replastering: This specification utilises plasterboard, which is adhered to the wall using a special damp and salt-resistant adhesive in conjunction with a paintable salt-inhibiting primer cream. This system provides the speed and convenience advantages of a traditional “dot & dab” plasterboard application and also provides a salt and damp-proof interior wall surface.

It is possible, with the use of dry-jointing techniques, to complete the replastering process from start to finish within 24 hours, making this specification ideal for situations where occupants/tenants need to re-enter the room as soon as possible.