All masonry walls absorb water during rainfall and then release it in dry weather conditions. This is part of the normal functions of a wall and should not cause any problems or damage. However in periods of prolonged rainfall, walls can become saturated and penetrating damp may occur inside the building (this is especially relevant with solid walls).

When masonry gets wet, it also becomes less thermally efficient than when it is dry, which means that buildings constructed with solid walls lose more heat through them when they are wet.

‘Stormdry’ is a new product, which has been tested by the University of Portsmouth and has been developed to prevent water penetrating masonry. It is a colourless, breathable water repellent treatment for brick and stone constructed walls.

It provides protection against rain penetration through masonry cracks smaller than 0.3 mm. However prior to the application of ‘Stormdry ‘  large cracks should be filled, defective masonry repaired and if the mortar pointing is in poor condition, it should be re-pointed.

It is applied as a cream in one coat and permeates deeply into the masonry before curing to form a water repellent barrier that provides protection against penetrating damp and improves the thermal efficiency of masonry by keeping it dry.