• Controls dampness & salt migration
  • Breathable - allows wall to dry naturally
  • Compliant with BS EN 998-1:2010
Dryzone Renovation Plasters

For more information call 01403 210204

Dryzone® Renovation Plasters

Standards & Accreditations
EN 998-1:2010 Renovation Plaster
Replastering using the traditional replastering method

Dryzone renovation plasters are breathable and they contain a blend of ingredients developed to control dampness and salt migration in walls.

The plasters are used as part of the Dryzone System for replastering after Dryzone Damp-Proofing Cream or Dryrod Damp-Proofing Rods have been used to create a remedial damp-proof course. These highly effective renovation plasters have a porous structure which controls salt migration and allows walls to dry out by evaporation.

Suitable for use on salt and damp contaminated walls and provides enhanced salt protection compared with competing products.

Where time is a major concern Dryzone Express Replastering System should be considered. This is hybrid plasterboard system that can treat walls affected by rising damp and prepare them for redecoration in under 24 hours.

Controls Dampness & Salt Migration

Dryzone Renovation Plasters are specially designed to deal with salt migration and dampness when a wall is drying down after a DPC installation.

Standard gypsum plasters soak up residual moisture left in the wall. Any salts in the wall migrate to the surface and break down the structure plaster.

The porus structure of Dryzone Renovation Plasters allows walls to breath and dry down naturally with allowing salt and moisture to migrate to the surface or damage the plasters structural integrity.

Application of Dryzone Renovation Plasters

  1. Remove all damp and/or salt contaminated plaster
    Remove all skirtings and architraves which cover any contaminated plaster. Remove all damp and/or salt contaminated plaster to a height no less than 300 mm above the maximum level of visual rising damp.
  2. Install the damp-proof course as per normal
    Remove any timber fixing grounds that are present in the masonry, then proceed with the application of Dryzone Damp-Proofing Cream or Dryrod Damp-Proofing Rods as per normal.
  3. Mix the Dryzone Damp-Resistant Plaster
    Dryzone Damp-Resistant Plaster should be mixed with a drill mixer. Pour 5 litres of water into a container, then slowly add all of the plaster to the mix. Start mixing the product at a low speed to minimise dust generation. As the paste begins to form, the mixing speed may be increased. For Hi-Lime mixing instructions, see the datasheet which is available in the ‘downloads’ tab at the top of the page.
  4. Apply a rough coat of plaster to the wall
    For particularly high suction or dry backgrounds, first wet down the surface using clean water. Do not use other additives such as PVA. Dryzone renovation plasters are applied in two layers. The first layer is a rough coat of 5 mm thickness. This will act as an anchoring layer for the second layer, which should not be applied until the rough coat has become sufficiently firm.
  5. Apply the second coat of plaster to the wall
    Apply the second layer of plaster to a minimum thickness of 10 - 15 mm for Dryzone Damp-Resistant Plaster [1], or 15 mm for Dryzone Hi-Lime Renovation Plaster [2]. The working time of Dryzone Damp-Resistant Plaster is approximately 30 - 60 minutes; if the product starts to stiffen, do not attempt to rework or remix. For more specific application instructions, please refer to the product datasheet which is available in the ‘downloads’ tab at the top of this page.
  6. Level the plaster with a simple straight edge
    Level the plaster with a simple straight edge or adjusters to maintain the thickness without using excessive pressure on the product.
  7. Finish the job by applying the final coats
    Dryzone renovation plasters can be left as a decorative finish. Any other finishing (e.g. application of a skim coat) is carried out once the curing process is complete, after at least 14 days. Dryzone Mould-Resistant Emulsion Paint can also be used as a finish.

[1] Thinner thicknesses may be used (e.g. when matching in with existing plasterwork) but maximum moisture salt resistance is achieved when the total plaster thickness is at least 20 mm (2 layers)

[2] Thinner thicknesses may be used (e.g. when matching in with existing plasterwork) but maximum moisture salt resistance is achieved when the total plaster thickness is at least 25 mm (2 layers)

Dryzone Damp-Resistant Plaster Properties

[1] Applied in two coats of different thicknesses. See the ‘Application Information’ section on the technical datasheet for full details.
Appearance Off-white powder
Size(s) & Packaging 25 kg bags
Coverage [1] 1 bag covers 1 m2 (at 20 mm thickness)
Thermal Conductivity 0.3 W/mK
Reaction to Fire Class A1
Breathability µ ≤ 15
Bond Strength ≥ 0.3 N/mm2
Storage Store in a dry place
Shelf Life 6 months in unopened packaging
Compressive Strength CS II

Dryzone Hi-Lime Renovation Plaster Properties

[2] Applied in two coats of different thicknesses. See the ‘Application Information’ section on the technical datasheet for full details.
Appearance Off-white powder
Size(s) & Packaging 20 kg bags
Coverage [2] 1 bag covers 0.8 m2
Thermal Conductivity 0.4 W/mK
Reaction to Fire Class A1
Breathability µ ≤ 15
Bond Strength ≥ 0.1 N/mm2
Storage Store in a dry place
Shelf Life 2 years in unopened packaging
Compressive Strength CS II

For more information call 01403 210204