Installation Information

■ 1. Install DELTA®-TRELA in horizontal runs (i.e. parallel to eaves) with the dimple texturing facing upward and the 10 cm edge margin positioned on the side closer to the ridge. Use wide-head nails to fix the sheet over its edge margin.

■ 2. Install the next roll such that it overlaps over the edge margin of the roll immediately below, ensuring safe water lead-off to the gutter. Standard-sized fixing clips and nails can be used to fix the cladding panels due to the high compressibility of the dimpled air-gap mat.

■ 3. At the end of the roll, peel and cut off a 10 cm wide strip of the air-gap mat to permit overlap over the end of the neighbouring roll. Use the same procedure for connections to valleys, dormer windows etc. The non-directional dimple texturing of DELTA®-TRELA allows installation at any angle (i.e. not only parallel to eaves) when required e.g. at structural details. On transition areas not requiring an air-gap layer, use DELTA®-VENT S (= the base sheet in DELTA®-TRELA) for full compatibility.