Matching A Roof Pitch

Roof pitch is measured as rise over run so a roof that rises 6 in 12 is referred to as 6 12.

Matching a roof pitch.

The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. That s when you start thinking about adding on to your existing building. To maintain a consistent ridge height in these situations the roof pitch must be adjusted. With the roof pitch the same it doesn t matter if the new addition is slightly off in height or lined up front to back because you re going over or under the old roof.

For a gothic style the rafters must equal the span 60 while an elizabethan style requires the rafters to be longer than the span. If you a looking for a sleek modern style a not entirely flat roof with a pitch of 1 40 should be used. Looking into taller garage doors and windows above them or a single in the middle. It happens all the time you grow out of your home and need an extra bedroom a bigger kitchen maybe you want to add a garage.

Also saw a cool design on another house where just the center door was massive so that may also be an option. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. That would give me the 12ft wide by 10 12 ft extension that i want but i would need to go with a 0 5 12 pitch in order to avoid blocking too much of the view. So where ever it s easiest you can go on the roof itself or work from the bottom along the rake it works out the same either way then use a level and a tape measure to see what you have.

I think i ll be leaving the roof pitch alone and tackling the elephant in the room that boring front design. This video above shows how the finished roof planes in off angle roof construction will look when completed. You talked about replacing the rafters on the bump out but if you want to maintain that same roof pitch all along that side you will have to modify the roof plane all the way to the back of the house otherwise you re going to have an ugly transition section in the middle. Matching up to an existing roof.

Quick tip matching the pitch when using a roof ladder for a steep pitch roof operation rather than using two roof ladders one to ladder the roof and the other to work off of or when you have a long roof from peak to roof line you can use an extension ladder to match the pitch of the roof. Another by product of this roof configuration is varying soffit heights and widths which require further design decisions. Or maybe it s your shop that s getting crammed and you could really use some extra work space.