T-Roof YEP 2500

Preparation: 
Installation is done with strips across the direction of the roof slope. Rolling is done from right to left so that the side inside the roll becomes the top side when unrolled. The strips are easiest laid from the bottom and with overlapping subsequent upwards. The substrate should be dry, even, and stable to avoid deflection and movements.

Nailing and seam gluing:
Mechanical fastening should be with hot-dip galvanized roofing felt nails at least 25 x 2.5 mm. The fastening can be concealed in the upper adhesive edge of the lower sheet. The overlapping sheet is adjusted, fastened, and the protective film on the adhesive edges is removed. Then the overlap is pressed together so that the fastening remains hidden. Alternatively, the fastening can be open. In case of any transverse joints, approved roofing felt adhesive is used. For more detailed installation instructions and other detailed solutions, see the separate installation guide (included with each roll and in digital format on the website).

• For open and visible fastening, consider roof slopes <14° (<1:4) as the underlay may be exposed to precipitation and/or if the outer roofing is not installed immediately. Coat the nailing with Sealant K-36 or equivalent repair compound for bitumen waterproofing.
• When covering with flat roof tiles, the supplier's guidelines for the underlay must be followed!
• For concealed fastening, carefully check the strength of the joint after installation. Consider adverse weather conditions and ensure any temporary securing of overlaps or protective covering until the permanent surface layer is installed!
• The adhesive edges have aggressive adhesion under normal conditions! In cooler weather (<+10°C), there may sometimes be a need to improve adhesion. Use a heat gun and gently warm the adhesive surfaces. Press the seam together carefully! In cool weather, rolls should be pre-stored for at least 1 day in a warm storage.
• Be mindful to gently load the surface and immediately repair any damage with roofing felt adhesive Sealant K-36 or equivalent repair compound for bitumen waterproofing. For larger damage, use and attach/glue a strip from the underlay felt.
• Mechanical fastening should be hot-dip galvanized roofing felt nails, minimum 25 x 2.5 mm.
• Always cover with the surface layer (tiles, sheet metal, etc.) as soon as possible to avoid exposure to sunlight and
  poor weather conditions. During the construction period, the underlay paper can be exposed to sunlight for up to a maximum of four months. In the usage stage, the underlay fabric should be protected by the outer roof covering.
• Rolls should be stored upright on a flat, dry surface and protected from sun and precipitation.
• Since T-Roof YEP 2500 is diffusion-tight and mounted on a wooden substrate, the space underneath should be ventilated according to practice.