There s a great video of how to install a cupola on a pitched roof.
How to mount a cupola on a roof.
Mark the boards apply another screw.
1 5 inches of cupola times the feet of the roof line 2.
Mount all four blocks to the roof sheathing and drive the top fasteners into the ridge board.
A sturdy ladder to begin installing your cupola and weathervane.
With your screw gun attach the two boards 3 4 to the top with a single screw.
Lay the hinge tool across your roof ridge and adjust the boards until it fits snugly.
If you don t want ventilation simply mount the saddle without doing anything to your roof.
The base of your cupola comes square.
If your shed cupola will be used for ventilation you ll have to cut a hole in your roof.
Cut a piece of cardboard the size of your cupola base.
Predrill your holes in the block and apply silicone to the bottom of each block prior to attaching it to your roofing.
The hole should be about 16 in.
This becomes your cutting template.
Screw the two boards together tightly and bring your hinge tool down with you off the roof.
Down from the ridge depending on the pitch of your roof.
Cut the cupola base to match your roof s pitch.
Preparing your roof draw a center line on the cupola base on two opposite sides these will become the angled cutouts for your roof.
Measure the roof pitch using the two 1 x 3 boards.
Straddle the roof with each board as shown making sure each side is flat against the roof and the center is at the center of the peak.
Wide at the ridge and extend 10 to 14 in.
To do this you must first determine roof angle or make a pattern using two boards as shown in this image.
Line up the pivot point of the template with the center line and make sure the corners of the template meet with both.
First remove ridge cap where cupola will be installed.
All you need are two boards and a screw.
Use bottom of this pattern to mark cupola base on two sides.
Mount four sections of 2 4 blocks on the roof to fit flush inside the edges of your cupola.
You ll use this to find the angle when you cut out your cupola base.