What membranes is the M-2 double-sided tape intended for?

JUTA defines M-2 as a double-sided adhesive tape specially designed for waterproofing membranes. It is used to join overlaps and abutments where two surfaces need to remain pressed together. It is not painter's tape, despite the inaccurate alt text on the store image, and should not be chosen for decorative painting or temporary masking.

What size is the M-2 roll with SKU LT-5040?

The product variant is 38 mm wide and 50 m long, with SKU LT-5040. The nominal length means up to 50 linear meters of continuous joint before cutting. The width should correspond to the overlap and pressure area. For the site, measure all membrane joints and abutments instead of converting the square footage directly into the number of rolls.

Where is M-2 applied during the preparation of the roof drip edge?

In JUTA’s official sequence for the drip edge, M-2 is glued in the middle part of the metal drip edge, after which the membrane is connected to it. This directs water from the under-roof layer to the correct edge. The exact detail must maintain continuous drainage; the tape cannot compensate for a reverse slope, interrupted, or improperly shaped drip edge.

Can M-2 be used in a detail around a hip ridge?

Yes, JUTA shows M-2 in an installation detail for a hip ridge, where the double-sided tape fixes the membrane to the drip edge element. The membrane on the opposite side is laid with the intended overlap. This is a specific system node; M-2 is not a substitute for ridge ventilation tape, fasteners, or a metal cap and does not remain as an exposed end seal.

Why should M-2 not automatically be replaced with K-2?

M-2 is intended for waterproofing membranes, while the butyl rubber K-2 is mainly aimed at polyethylene foils PAROBARRIER and HYDROBARRIER. Different bases have different surfaces and installation functions. Even when sizes seem similar, substitution is allowed only with confirmed adhesion and system compatibility. For the specific detail, follow the membrane’s instructions, not the general term “double-sided tape.”

How is the quantity of M-2 for a roof membrane calculated?

Add up the linear meters of all overlaps and abutments for which the project requires M-2, including connections to drip edges and complex edges. Divide the total length by 50 m and round up, considering individual cuts and interruptions. Do not automatically add every joint: some places may require another single-sided tape, sealant, or special factory detail.