Penetrating damp is the largest source of unwanted water in buildings and can cause serious damage to the fabric of the structure in many ways:-

• Penetration of rain through the wall to cause damp patches
• Frost damage
• Cracking due to swelling and shrinkage
• Impairment of thermal insulation properties
• Conditions suitable for organic growth (moss, algae)
• Efflorescence and salt damage caused by hydration and crystallization

Where there is water penetration in masonry causing these problems, they can be prevented or considerably reduced by the use of water repellents available from ACS.

There are three products available from ACS and their use in general is briefly described below (a full Code of Practice is available for the application of water repellents).

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Preparation

Surfaces must be dry, dust free without cracks or spalling.

Application

ACS 290 Water Repellent and Universal Water Repellent are supplied ready for use; the AQ Silicone Water Repellent is a solvent free concentrate diluted 1 part to 9 parts water.

The preferred application method is low irrigation flood coats to the surface, paying particular attention to mortar joints.

Precautions

Sensitive areas such as windows, stained wood and aluminium should be protected accordingly.

Consumption

Will vary from 1 to 4 sq.m/litre depending on the porosity of the substrate.

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Contact address;

ACS Limited

Bofors Park, Artillery Road, Yeovil,

Somerset BA22 8YH

Tel: 01935 414012 Fax: 01935 414022

E Mail:info@acslimited.co.uk

See also - www.wood-protection.co.uk