GUNDLE API RANGE OF LAMINATED ROOFING PRODUCTS
The latest addition to the Gundle range of products is the Durafoil insulation membranes. These membranes are all aluminium foil laminates and conform to the SABS 1381-4 specification covering material for the thermal insulation of buildings.
The Durafoil range consists of various laminates, and each product has been specially formulated for a specific insulation application – be it industrial or domestic.
GUNDLE API CERTIFIED PRODUCTS – DURAFOIL INSULATION AND UT WOVEN MEMBRANES
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The product is aesthetically pleasing and attractive when applied under metal roofs. Insububble can be used under domestic or industrial roofs. It is flame retardant, tested in terms of SANS 10177 the product has been classified as class B/B1/2/H which means it has a superior flame retardency and can be used in any structure with a B1 rating with sprinklers. The product has been tested with sprinklers.
Insububble has a strong tear-resistance and will not expand when in contact with changing roof temperatures as in the case with other bubble type insulation membranes which consist mainly of polyethylene layers.
Insububble is dimensional stable and easy to work with.
The reinforcing scrim provides additional strength and stability making the product ideal for industrial applications.
Durafoil DSD has a B/B1/2/H fire rating which means it has a superior fire resistance and can be used in any structure with a B1 fire rating with sprinklers.
The product will also act as a dustproof layer when used under roof tiles and has excellent vapour resistance.
Durafoil Ultra Single foil does not have foil on the section of the membrane which acts as the overlap; this reduces the cost of the membrane as the section where the membrane overlaps the layer underneath makes the foil surface ineffective as it needs an airspace to function as an insulator.
Other than insulate the roof space the membrane will reduce draughts and dust penetration into the roof area. The membrane is also designed to prevent moisture from damp air from condensing on the ceiling boards and other vulnerable points in the building fabric.
Most home loan institutions insist on the use of an under-tile membrane where the roof pitch is less than 26 degrees or more than 45 degrees and also in exposed coastal areas as the membrane will prevent strong winds from ripping off roof tiles.
One layer of UT White® weatherproof sheeting, 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 UT White(r0 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.
Turn down the UT Woven® over the fascia board at the eaves and seal into the gutter.