As a general guide pitches under 14 degrees should have a lap of 150mm while those over 15 degrees usually require a lap of 100mm.
Pitched roof breather membrane.
Tyvek supro is the market leading breather membrane and is a water resistant membrane suitable for all supported and unsupported pitched roof applications in commercial and residential buildings.
Our breather membranes will make your roof constructions completely water tight and moisture resistant.
Roof breather membrane on the other hand allows far greater moisture transfer making it crucial that there is adequate air movement above.
Although it can be made air permeable to some degree high resistance membrane is only suitable for use in cold ventilated pitched roof systems.
If your roof pitch is over 35 degrees you may be able to reduce the lap to 75mm.
The primary job of a roof membrane is to ensure that water cannot ingress into the structure so it can t cause damp and mould.
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They work by allowing insulated structures to easily release excess moisture vapour into the atmosphere.
They also repel any water most commonly rain that tries to enter the building.
What is a breather membrane.
Roof membranes are used to protect the building beneath the roof tiles so that insulation timber and other materials aren t exposed to the wet.
Roof pitch is another important consideration since it will determine how big the membrane lap needs to be.
Choose from tlx breathable pitched roofing felt tyvek s supro breather membrane klober permo breather membrane and protect membranes as well as several others from brands such as cromar harcon powerlon and easy trim.
Vapour permeable breather membranes protect against wind insects dirt weather penetration whilst insulating your property.
Installed to the outer side of the insulation over or under the counter battens on a pitched roof breather membranes allow water vapour to escape from inside a building.
Breather membranes are installed to the outer side of the insulation for example either over or under the counter battens on a pitched roof and allow water vapour to escape from inside a building without the need for ventilation.
If you have any queries or project specific questions feel free to call our team on 01752 692760 or use the live chat in the bottom right hand.