How To Frame A Bow Window Roof

How the room looks before the bow window is installed.

How to frame a bow window roof.

How to frame a rough window opening install a new window trim out the interior and exterior around a new window plus all of the finishing. Do not use this method to framing bay window roofs. It s wrong and just plain ugly. Making a curved frame is first.

First the instructions to find the ridge length is wrong. Roof framer s bible framing a bay window roof page 206 does not follow the holly grail of roof framing trigonometry and geometry. In fact rotten wood on bay or bow windows is a very common problem as most of these windows were installed 15 to 20 years ago. Then create the perimeter of the roof using the 2 by 6 sub fascia boards.

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. I broke the job into its three major parts. It s time to finish planning the roof frame. We asked one of our veteran builders to show us how it s done.

You may also want to install long screws to affix the board even more securely. Given the construction of bay or bow windows and their unique exposure to the elements it is a safer bet to replacement them with a vinyl bay or bow window. It looks like diy built the bay window roof. Plywood tacked to the shop floor.

Plan out the roof. Using your chart from the roof frame calculator as a guide cut the rafters to size with your saw and nail them securely into place. I started by making a full scale plan drawing of the job on 1 4 in. I made the components in my shop and then trucked them across town to the neffs house.

Before you can start on the roof you ll have to install the bay. Here are the steps involved in framing a bay window roof. Most of the time a bay window will have a. Cordova construction framing a big bay window.

The window frame the section of curved wall surrounding it and the roof. Install the bay window after careful planning. The secret to a good looking roof is having the right proportions.