How To Build A Dormer On A Shed Roof

Build a shed dormer step 1 remove the ceiling drywall and insulation from an area 1 foot higher and 2 feet wider than the area where the dormer will go.

How to build a dormer on a shed roof.

Cut through the drywall with a utility knife and pull it away from the rafters. Making shed dormers work a shed dormer can be the best way to add space to a one and a half story house but you have to get the details right if you want the dormer to be an asset. Remove the shingles and the sheathing board from the area of the roof where the dormer will constructed. Proper layout you should determine the size of the shed dormers first and then gather other things to make it correctly.

After determining the size of shed dormers you would like remove the shingles and use a measuring tape to draw the layout of the dormer on the roof with chalk. The center wall and cheek walls act as buttress walls to resist thrust from the front roof and to eliminate the need for a structural ridge. Mark the inside edges of the dormer s sidewalls in chalk. Roll the tarp up so you will be prepared in the event of rain.

Recessed dormer set into the roof a recessed dormer i like to call it a sugar scoop maximizes the height of the dormer face while minimizing the projection of the dormer roof above the main roof plane. Use measuring tape to determine the exact size. In the center of the dormer we installed a double rafter with a wall below sheathed on both sides with 1 2 inch plywood. The dormer s roof slope should be at least 4 in 12.

Along the level line and using a square to draw a perpendicular line up to the roof edge of the board. Make a rafter cutting jig by measuring 12 in. Make a simple rafter jig if the slope of your dormer roof is the same as your old roof hold a scrap of plywood against the old roof boards and draw a level line on it. Using this outline as a guide use a drill to create a pilot hole at each of the 4 corners that you have marked being certain to drill straight down through the ceiling.

Now you should draw the layout of the shed with chalk removing the shingles. Affix the tarp to the roof screwing a 2 by 4 5 08 by 10 16 cm over it. Manual drawing of a shed dormer to match the auto floating dormer tool created one.