Roofing underlay / underlayment for sloped roofs breathable or not, at the best prices you can find at 0030 2310 428900 - Thessaloniki - Greece / info@macon.gr
We serve Cyprus, Greece and the Balkan region.
What exactly is a roofing underlay / underlayment and what is its role?
It is a thin waterproofing membrane positioned exactly under the tiles with the main roll to prevent the water which enters through the tiles' gaps to penetrate into the roofing system and cause problems to its integrity and functionality.
There are two main kinds of roofing underlay / underlayment for sloped / pitched roofs:
1. Breathable or breather membranes
These membranes let water vapor pass freely through their mass and can be used in ventilated and non ventilated roofs.
They don't need ventilation under them so they can be installed directly on the thermal insulation layer.
They are lighter and mechanically less robust than bituminous underlay.
Usual weights: 100 - 215gr/m2
Usual structure: three layers
2. Non breathable membranes ( normally bituminous / asphalt)
They are more robust, but because they are not vapor permeable, they are used only in ventilated roofs.
Usual weights: 400 - 600gr/m2
Usual structure: one layer centrally reinforced
Roof underlay / underlayment for pitched roofs breathable or bituminous, at advantageous prices you can find at 0030 2310 428900 - Thessaloniki - Greece / info@macon.gr
Christos Strogilis
Civ. eng. – MBA – DipM
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