Octagon windows, Bay and bow window roofs, Garage door transoms, Round"Porthole" window and Window and door canopy’s

Installation Instructions for Round"Porthole" windows

Outside nail-fin dimensions are 17-1/2", outside casing dimensions are 15-1/2", visible glazing is 12-1/4" prox. and the rough opening is about 15-5/16" for installation from the outside and 15-9/16" for installation from the inside.

The more carefully and closely the opening is cut, the easier the job and the better it will look.

1 The unit can be, A, fastened to the outside sheathing of a project and finished with siding or trim or, B, an opening the size of the window could be carefully cut into the siding, for instance T111, and the window could be installed and fastened through the nail fin from the inside, as long as the siding isn’t thicker then the window casing which is about 1", and then caulked on the outside around the casing. This latter installation is probably better for a project that will have no or limited interior finish.

2 The window frame is clad with a durable one piece polymer cladding. The cladding needs no finishing.

3 If installing the unit from the outside, the rough opening is about 15-5/16", cut the opening, check for a fit, caulk the perimeter of the exterior nail fin where it contacts the building and install the unit. It is important that the cladding is not nailed randomly, use aluminum or stainless steel screws or nails and fasten through the holes provided, or drill new holes a little larger than the shank of the fasteners being used.

4 Cover nailing flanges with siding or trim. nail the siding or trim through the holes provided in the window nailing flanges or pre-drill a new hole a little larger than the fastener shank.

OR

5 If installing from the inside carefully cut a 15-9/16" opening the size of the window into the siding, for instance T111, and the window can be installed and fastened through the nail fin from the inside and then caulked on the outside around the casing.

6 Stain or paint any unfinished wood surfaces, all surfaces must be finished as soon as possible to prevent warping. Apply a bead of caulk where the casing contacts the exterior trim.

7 Install interior trim, if any.

September 2, 2009