Dry Roofing Dry Fixing Roof Ventilation
Redland
Dry Roofing Dry Fixing Roof Ventilation
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:
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Weathertight systems with reliable mechanical
fixing against wind uplift.
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Attractive, neat appearance, fully compatible
with Redland tiles and slates.
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Elimination of wet trades allows quick and
easy fixing in all weathers with no special tools required.
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The ridge line can incorporate high level
ventilation.
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Maintenance-free, both ridge and hip tiles
can be easily removed and replaced for inspection etc.
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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.
Redland Roofing Range Roof Tiles Roofing Systems
Redland Head Office
Monier Ltd
Regent House
Station Approach
Dorking
Surrey
RH4 1TG
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