Where is the sealing tape U-1 placed on a roofing membrane?
U-1 is glued onto the membrane along the line where it contacts the rib or beam. Then the counter batten is fixed onto the tape. This way, U-1 remains pressed between the membrane and the wooden element in the area of mechanical penetrations. This is a seal under the counter batten, not a tape for joining the free edges of two sheets.
What size is the sealing tape U-1 LT-5042?
The active version of U-1 is 50 mm wide and 25 m long, with SKU LT-5042. The width should cover the contact line under the counter batten, and one roll provides up to 25 linear meters before cuts and interruptions. The quantity is determined by the total length of all beams or support lines where the counter battens are mounted.
What is the installation sequence for U-1 and the counter battens?
First, the roofing membrane is laid and positioned. Then U-1 is glued exactly over the supporting beam in the future contact zone. The counter batten is placed on the tape and fixed with appropriate corrosion-resistant fasteners according to the project. If the tape is glued outside the axis of the counter batten, it will not seal the intended line of penetrations.
Can U-1 replace the overlap tape for membranes?
U-1 is not intended to replace the overlap tape. It works under the counter batten, where the membrane is pressed against the beam and pierced by fasteners. For joining sheets, JUTA uses other tapes, such as M-2 for membranes or K-2 for certain foils. Placing U-1 over a free joint does not fulfill this system detail.
How many rolls of U-1 are needed for a roof with several slopes?
Add the lengths of all lines with counter battens on the beams for each slope. Divide the total by 25 m and round up, considering interruptions around ridges, gutters, windows, and other nodes. The roof area alone is not sufficient because two roofs with the same square meters can have a different number and length of beams.
Does U-1 structurally fix the counter batten to the beam?
No, U-1 is a sealing tape and not a structural fastener. The counter batten must be fixed to the supporting base with appropriate nails or screws specified according to the roofing detail. The tape remains between the membrane and the wood to seal the contact zone. Do not rely on the adhesive layer to bear wind, self-weight, or other structural loads.
