How To Build A Bow Window Roof

Before you get started with the roof the bay window itself needs to be in place.

How to build a bow window roof. Bow window roof idea first of all you need to extend all the floor joist outside under the window you can cantilever them back under the floor 4 foot oh wait thats minimum code you better go back 6 feet put a new joist on each side of the existing joist 1 extra joist is minimum code so use 2. Plan carefully consulting with the architectural plans before commencing work. From the exterior wall. You may be able to purchase a ready made roof or you may need to custom build one.

To start building the frame of the roof use a 2 by 6 fascia board to create the perimeter of the roof by nailing in onto the back wall. Install a temporary support wall 2 to 3 ft. The author devises a method for making a curved five sash bow window that is installed in a 1915 bungalow style cottage. Remember to wear safety gloves and goggles for protection when cutting the boards and nailing them.

Im a visual learner so if youve got anything you can post to help other than formulas id would be greatly appreciated. Step 2 plan the roof. Veteran contributor join date. Once the window the window frame and the window cap are all in place and have been secured and insulated you can get started on framing the roof.

To begin construction install the trusses starting with the end trusses. Then sheathe the roof with. A smaller bow window may not need this type of support and can be installed much like a standard flanged window. Customer called be to frame a bow window roof.

Anyway im pretty good a complcated roofs but never have done one of these. Unlike a traditional hip roof the roof over a bay window with 45 degree sides is based on an octagonal roof but most people don t know how to frame an octagonal roof. Plan how you will finish the top and bottom of the bay window. Next measure the area and make calculations so you know how much of your chosen materials to buy.

By spencer horn issue 122 synopsis. To build a roof start by deciding whether you want to put up a flat or pitched roof on your building. Then use the chart from your online roof frame calculator to cut the rafters to size and nail them into place. Building a bow window from scratch lay out the curved plates with a trammel then use them as a bending form for laminated trim.

Position studs directly under each truss or ceiling joist. Not to be confused with a bay which i believe is not rounded like a bow. Remove the old window photo 1. We asked one of our veteran builders to show us how it s done.