As with any window installation method, the rough opening must be prepared by ensuring flush, level, smooth clean, dry surface. The sheathing must be trimmed properly to support the window frame and ensure long-term structural integrity of the exterior construction wall.

Apply PM-7000 liquid applied flashing membrane (#1 in diagram) to bottom of opening and out nine inches to side of opening at lower portion of opening. Do not apply material to sheathing below rough opening.

PM-7000 is packaged in cartridges or bulk to be applied with standard caulk tools then brushed, rolled or troweled to desired coating thickness.

While PM-7000 is still wet, install pre-creased fabric counter-flashing (#3 in diagram) three inches above bottom of opening extending nine inches to both sides. Cut textile flashing at sides of opening to the bottom of opening and told over still. Press Fabric counter-flashing into liquid with broad knife.

Apply PM-7000 to the balance of the rough opening (Areas 1,2 and 8 of diagram), over fabric counter-flashing at still and out nine inches at sides and top of opening. PM-7000 will not be transparent when applied at the correct thickness of 12 mils.
After PM-7000 has dried to touch (15-30 minutes) the opening is ready fro windows installation but can be exposed to weather for extended periods without damage.

Install window, with drainage mesh or shims at bottom flange to allow for water management.

Push closed-cell foam backer rod (#5 in diagram) into gap around interior side of window frame to ensure a proper depth to width ratio.

Apply WS-7100 interior seal (#4 in diagram) around entire frame at interior side of window. Tool uncured sealant with appropriate equipment (spatula) to ensure proper contact with window frame and coated rough opening surfaces.