Category: Redland Dry Roofing Dry Fixing Roof Ventilation
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Redland Roofing Dry Roofing & Ventilation Systems
Dry Tech Roofing

Redvent Roofing

Roofing Systems
When roof tiling, two alternative systems can be adopted at the
perimeters: mortar bedding or dry fixing. The respective suitability of
each system should be considered before commencing detailing or
specifications.
Mortar Bedding
Wet mortar bedding has been employed for hundreds of years in the
construction of roofs, especially at ridges, hips, valleys and verges,
and may still be appropriate today for certain building styles.
It should be noted that the effectiveness of mortar bedding is highly
dependent on the quality of workmanship and site control. On steep roof
pitches, in exposed locations or where the consequence of failure
involves a high risk to the public, the use of mechanical fixings is
strongly recommended. For other situations where the use of mechanical
fixings in conjunction with mortar bedding is recommended, refer to BS
5534.
Dry Tech Systems
Redland has developed dry, mechanically fixed solutions that overcome
problems of mortar failure and can include ventilation options. Dry Tech
Systems are available for both duo and monoridges, verges and hips. They
are designed to be simpler and more economical in the long-term, than
traditional mortar bedding.
The advantages are:
Weathertight systems with reliable mechanical fixing against wind
uplift.
Attractive, neat appearance, fully compatible with Redland tiles and
slates.
Elimination of wet trades allows quick and easy fixing in all weathers
with no special tools required.
The ridge line can incorporate high level ventilation.
Maintenance-free, both ridge and hip tiles can be easily removed and
replaced for inspection etc.
Complies with the requirements of BS 5534; wind-tunnel tested.
Ventilation
Condensation in roof spaces has become an increasing problem for
several reasons. Changes in building standards to reduce energy
consumption, together with the increasing use of appliances such as
dishwashers and tumble dryers, have contributed to the increasing
presence of water vapour above roof insulation.
Increased levels of roof insulation result in a colder roof void, so
prompting severe condensation risk. The use of underlays, necessary for
wind uplift resistance, greatly reduces natural ventilation of the roof
space.
BS 5250, the British Standard for the control of condensation in
buildings, sets out best practice recommendations for managing
condensation risk in roofs.
Redland’s range of Breathing Roof Solutions provides the optimum
specification when using a vapour permeable underlay.
Information associated with: Redland Roofing's Range of Roof Tiles &
Roofing Systems
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Redland Head Office
Monier Ltd
Regent House
Station Approach
Dorking
Surrey
RH4 1TG
Customer Service Hotline:
Tel: 08705 601000
Fax: 08705 642742
Technical Solutions Hotline:
Tel: 08708 702595
Fax: 08708 702596
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