Permarock Dry Dash
Dry dashing is a traditional decorative rendering technique, applied to exterior wall surfaces. It produces a finish that is tough, durable, long-lasting, cost-effective and virtually maintenance-free.
Dry dashing can be achieved using Permarock Dry Dash, which comprises a mineral-cement Dashing Mortar and a choice of blended Dashing Aggregates.
Dashing Mortar
Permarock’s specially formulated Dashing Mortar is self-coloured and polymer enriched. Hardwearing and flexible, it offers superior performance to traditional sand-and-cement renders. It is supplied as a pre-batched, pre-coloured dry-powder premix that requires only mixing with clean water on site.
It is available in Grey, White, Yellow, Cream, and Red, but other shades can be made to special order, subject to minimum order quantities.
Dashing Aggregates
Permarock Dashing Aggregates are supplied pre-washed and screened, and then blended to incorporate different types and colours of stones.
Available Colour / Texture / Grain Size
Ashton Cream
Barleycorn Quartz
Beige Marble
Black Spar
Brightstone
Buff Quartz
Calcined Flint
Cameo (subject to MOQs)
Classic Spar
Derbyshire Spar
Harvest Gold
Heritage (subject to MOQs)
Oatmeal (subject to MOQs)
Polar Black & White Spar
Polar Red & White Spar
Polar White Spar
Red Granite
Round Gravel
Sunflower
Yellow Spar
Product Samples
We can provide samples of the full range of decorative finishes and effects available for any given scheme.
Use our easy-to-use colour and sample selector to view, choose and finalise your colour selections.
You can view our entire range of decorative renders and finishes, and ordering samples couldn’t be easier. Add them to your basket in just a few clicks.
Suitability
PermaRend / Permarock Exterior Render System & Permarock External Wall Insulation Systems
Substrates
New cementitious base coats
Resistance to Soiling
Very Good
Colour Fastness
Excellent
Colour Range
Permarock Dashing Mortar: 5 standard colours Dashing Stones: 32 standard blends
Colour Options
Special colours can be produced subject to minimum order quantities
Number of Textures
1
Fire Safety
The Permarock Dry Dash system is assessed to EN 13501-1 and may be used as the decorative finish of a Permarock Mineral Fibre External Wall Insulation system. In such cases, the system achieves an A2-s1,d0 classification and is suitable for use on buildings of any height, including those with a storey height above 11 metres.
Any of the comprehensive range of graded dashing stones can be used with any shade of Permarock Dashing Mortar to achieve an attractive ‘pebble dash’ finish.
Dashing Mortar
6-8 kg/m² (3 to 8 mm) Dashing Stone
Method of Application
Supplied pre-blended to the specified colour, Permarock Dashing Mortar requires only mixing with water on site. The mixed and hydrated material is applied onto the prepared substrate (reinforced base coat) by stainless steel trowel at a rate of approx. 6 – 8 kg per square metre. The Dry Dashing aggregate is applied by casting the stones into the Dashing Mortar whilst it is still wet and in a plastic state so that a uniform appearance is achieved.
Application / Drying Conditions
The temperature of the material, substrate, and air should not fall below +5 °C during application and drying. The material cures and dries by hydration and evaporation and is usually sufficiently cured after 24 hours at 65%RH.
Lower temperatures prolong the drying time, whilst higher temperatures accelerate drying. High temperatures may lead to too-rapid drying / evaporation and should be avoided. Dashing in cold or wet conditions or using wet aggregates / dashing stones may encourage the formation of lime bloom which is more noticeable on coloured dashing mortars.
Packaging
Permarock Dashing Mortar is supplied in 25 kg sacks as a dry powder pre-mix requiring only mixing with clean water on site.
