What is the purpose of the UNI universal tape for PAROBARRIER VAP?

UNI is the connecting tape that JUTA prescribes for all horizontal and vertical overlaps and joints of the adjustable vapor barrier membrane PAROBARRIER VAP. Its task is to maintain the continuity of the vapor barrier layer and to limit the passage of air and water vapor through the joints. It does not replace the membrane itself, mechanical fastening, or the correct detail around installations.

What size is the UNI universal tape LT-5041?

LATIVA offers UNI in a 60 mm x 25 m version with SKU LT-5041. The 60 mm width allows the tape to cover the joint line on both adjacent surfaces, and one roll contains 25 linear meters before cuts. For quantity, measure all joints and connections of VAP and account for separate short details instead of calculating only by the membrane area.

Should the vertical joints of PAROBARRIER VAP also be sealed with UNI?

Yes, the official instruction for PAROBARRIER VAP covers both horizontal and vertical overlaps and all connections. An open vertical joint would bypass the adjustable layer and allow uncontrolled movement of moist air. During installation, the tape must continuously connect the sound sections of both sheets without interruption at corners and passing installations.

Can UNI be used instead of AL-1 for PAROBARRIER N90?

Automatic substitution should not be done. JUTA specifies UNI specifically for PAROBARRIER VAP, and for N90 and R110 prescribes AL-1 and K-2. Different membranes have different surfaces and system details. If UNI is planned for N90, R110, or a product from another manufacturer, compatibility must be confirmed in writing, not assumed from the word "universal."

How many UNI rolls are needed for 75 m² of PAROBARRIER VAP?

There is no fixed number just because the VAP roll is 75 m². The required UNI depends on the direction and number of sheets, room dimensions, vertical joints, connections to walls, and all openings. Add up the actual linear meters, divide by 25 m, and round up. For complex geometry, allow a reserve for short cuts and interruptions.

What should I check before bonding with UNI?

Check that the delivered membrane is indeed PAROBARRIER VAP and that the tape is the UNI 60 mm x 25 m version. The sheets must be laid according to the exact detail and have sufficient overlap so that the tape can continuously connect both sides. If the surface is damaged, wet, or heavily soiled, first follow the preparation from the technical instruction instead of relying on additional pressure.