Undertile
Membrane
Non Woven Under-Tile Membrane
A new non woven polypropylene membrane that has been specially formulated for use under roof tiles. It is 350 (micrometer) in thickness and made in rolls of 1,5 x 30m. Undertile Membrane is dimensionally stable, light in weight and weatherproof; handling and installation are easy, and will seal around nails.
It is used for the prevention of draughts and dust penetration into roof spaces through tiles, and prevents damage to ceilings, rotting of timbers and corrosion of plumbing. Dust has also been known to penetrate between cornices and walls, initiating or aggravating allergies in susceptible people. The membrane is also designed to prevent moisture from warm damp air reaching and condensing on the ceiling boards and other vulnerable points in the building fabric. Woven also prevents strong wind from lifting and ripping off roof tiles. Most home loan institutions insist on the use of under-tile membrane where the roof pitch is less than 26 degrees or more than 45 degrees and in exposed coastal areas.
UNDERTILE MEMBRANE SPECIFICATIONS
One laver of Undertile Membrane installed over common rafters and under battens to receive tiles. Allow a minimum overlap of 100 mm.
Boarding to be used at the open eaves to carry the Undertile Membrane to the gutter. The boarding gives added security to the structure because it prevents wind-lift of the tiles from the underside of the open soffit.
BENEFITS
- The material equalises the pressure and complements the function of the roof tiles.
- It is flexible and easily handled
- It is used for the prevention of draughts and dust penetration into the roof spaces through tiles, and prevents damage to ceilings, rotting of timbers and corrosion of plumbing.
- The membrane is also designed to prevent moisture from warm damp air reaching and condensing on ceiling boards and other vulnerable points in the building fabric.