Overview
A Z-frame sits within the recess and overlaps its front edge. The lip gives a finished border, covers minor perimeter gaps and projects approximately 10 mm into the room. Check the lip's landing surface as well as the clearance behind the blades.
How does a Z-frame mount to my window?
Secure the fixing leg inside the recess and let the lip finish against the front edge. Check the profile drawing and the surface under the lip before ordering. Allow 60 mm of unobstructed depth where the blades rotate; fitting the fixed frame alone does not establish that the panels can operate.
Can I install a Z-frame with an architrave?
Square and bullnose architraves can provide a suitable surface for the Z-frame lip, provided the recess has the necessary clearance. With decorative trim, check exactly where the lip lands: it may cover a moulded detail or bridge an uneven surface. Photograph the profile if you need help choosing.
Can I install a Z-frame with a window sill?
A projecting sill needs a bottom section that ends on the ledge. Specify this detail in the order so the bottom is arranged correctly. The top and sides can retain the Z-profile where its lip has room to sit flat.
Installing a Z-frame with obstructions
Measure to the most forward part of each handle, winder, lock or screen. The normal blade clearance is 60 mm, but an obstruction behind a fixed rail can require less space than one behind moving blades. Use the obstruction diagrams to check the exact location; do not approve an inside fit from depth alone.
