Fixing a tile flashing
Depending on the height of the tiles and proximity to the base of the window, it is sometimes necessary (with profiled tiles) to shape the tiles underneath the window to allow the corrugated apron to sit down correctly.
Measure out the desired cut point and use an angle grinder to chamfer the edges.
Replace the bottom course of tiles.
Install bottom flashing
Fix the bottom flashing section to the frame. Using your hands, press and smooth the apron to the contours of the tiles. If necessary, a rubber mallet may be used carefully to shape the apron.
Fit bottom cover
Fit the bottom window cover part.
Fit side flashing
Fit the side flashing sections. Make sure the side flashing section fits in the bottom section. Pin to the side of the frame.
Secure side flashing
Fasten the flashing side parts to the battens using the clips provided.
Fit side covers
Fit side cover parts.
Fit sash cover
Fit sash upper cover parts.
Fit top cover
Fit top cover part.
Fix top flashing
Fix the top flashing section. It should sit tightly over the existing top window cover part.
Replace tiles to the side
Replace the tiles up the side. We recommend that you slit the foam slightly, immediately above each tile. This prevents there being a gap where the tile steps up.
Ensure tiles fit
You are likely to need to cut the tiles on one side of the frame to ensure a perfect fit. But make sure the gap is within the recommended tolerances (30-60 mm).
Replace top tiles
Replace top row of tiles. It may be necessary to cut the tiles for a perfect fit. Maintain the recommended tolerance between the tiles and the frame (60-150 mm).
Position the roof window
Position the sash into frame. Make sure you support the frame firmly before positioning the hinge arms into the locking mechanism.
Flat tiles should have a gap of 0-40 mm to the frame. Profiled tiles should have a gap of 60-80 mm to the frame.
That's it! You have now installed your roof window.
Secure top flashing.