What does membrane seam and flashing tape seal?

It supports WRB and housewrap overlaps, window perimeters, corners, penetrations and repair details when selected for the system.

Why are window details important?

The tape and flashing sequence should direct incidental water back to the drainage plane rather than trap it behind the cladding.

Vapor-open tape options can be specified when they are required by the selected vapor-permeable wall design.

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WRB / Housewrap Accessory

Housewrap seam and window flashing tape for waterproof breathable membrane overlaps, wall penetrations and repair details.

ConstructionNonwoven-backed, PE-backed or high-elastic tape construction selected by detail

Common Widths50, 75, 100, 150 and 200 mm; custom width by order

Roll LengthCustom roll length and packing available by specification

UseWRB laps, window flashing, corner, penetration and repair details

System RoleSupports continuity of the water-managed and air-control detail when correctly installed

SupportSamples, compatibility review and OEM label discussion

Designed for sealing membrane overlaps and transitions around windows, doors and penetrations.
Flexible tape constructions can be selected for straight laps, corners and irregular detail geometry.
Vapor-open tape options can be specified when continuity of a vapor-permeable wall design is required.

A membrane sheet alone does not create a continuous water-resistive layer. Laps, corners, openings and penetrations need compatible detailing.
Window flashing tape should direct incidental water back to the drainage plane rather than trap it behind the cladding.
Vapor permeability and air-control performance are different properties; the selected tape should match the complete wall or roof system.

Confirm the membrane surface, cladding system, window or penetration detail and expected construction exposure.
Select a straight-lap, elastic or vapor-open tape construction according to the intended joint and system requirements.
Keep the membrane surface dry and clean, then apply firm pressure to ensure full contact and remove trapped air.
Follow the membrane and project instructions for lap direction, overlap dimension, window flashing sequence and termination details.

Use these application notes with the selected product data sheet and project specification.