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HOLISTIC APPROACH

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The Redland range provides a complete system for the roof and its junctions - eaves, ridges, verges and gables, plus all the elements needed to satisfy ventilation requirements.

Lafarge Roofing has always been at the forefront of the development of dry, mortarless fixing and roof-ventilation systems.

Special ventilation products have been designed to eliminate the harmful effects of condensation within the roofspace.

They are available for eaves and ridge with adaptations for every condition.

The advantages of these - durability, low cost and speed of installation - are well known to architects but less well known in the private house-building sector. The classic Dry Ridge, DryVent Ridge and Dry Hip systems remain the choice of the specifier seeking outstanding durability. These systems can be used with nearly all Redland tiles and slates, with DryVent Ridge providing a continuous weathertight air path from the roof void to the outside within a mechanically fixed ridge. Apart from the tile or slate ridge itself, the components - seals, clamps and fillers - are made of solid PVC, polypropylene and stainless steel.

However, a new Rapid Range of ridge and hip systems has just been introduced for more cost-driven housing. Rapid Vented Ridge comprises a purpose-designed breather membrane which is rolled onto the ridge and sealed to the top row of tiles; the ridge tiles are then fixed down with special ridge-to-ridge seals between them.

Rapid Hip consists of a weather-tight membrane and an inverted grp tray to which the hip tiles are screwed. Both Rapid systems can be fixed up to 40 per cent faster than wet, mortar-based fixing, and can be carried out when bad weather is expected. They, together with all other Redland roof accessories, comply with the requirements of BS 5534:1997, that the last 900mm of each ridge or hip is to be mechanically fixed, and BS 5250:2002, that pitched roofs 35infinity or over, or spans exceeding 10m, should have high-level ventilation.

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