The new attic plan needs to provide access to each part of the attic.
Flat or vaulted ceiling with gable porch roof.
Instead of the flat ceiling the triangular pitch of the roof becomes the gable ceiling.
By contrast an open concept great room built with ceilings only 8 or 9 feet high can feel tight dark and airless.
Vaulted ceilings allow more light to enter and pool in the room.
Here is the challenge.
When the end wall is constructed such that the top plate is level with the exterior walls there is no diaphragm at the intersection of the wall and a flat bottomed gable truss see photo in figure 1 above.
The two roofs meeting that description are the hip and the flat roof.
A gable roof is a heavy structure and if you want to prevent your roof from collapsing you ll have to frame the structure correctly.
A vaulted ceiling in one part of your house may create an attic space elsewhere that s isolated from the rest of the attic.
Indeed the ceiling finish is typically attached to the rafters.
Roof or ceiling diaphragm.
Gable hip shed and flat.
Gable ceilings are also available in attic spaces of homes with triangular rooflines.
The gable roof is loved for its vaulted ceiling and beautiful lines.
And vaulted ceilings do indeed make a room brighter especially when the roof is fitted with skylights or roof windows.
And on a shed roof.
Vaulted ceilings can be constructed by either stick framing which means attaching each joist and rafter individually or by setting roof trusses that come engineered from a truss manufacturer.
Structurally cathedral ceilings differ dramatically.
And that is why these are the most common rooflines you ll see on porch company porches.
Let s talk about the pros and cons of each of the four most often used roofs.
Gable ceilings are created when the builder or homeowner does not install a flat ceiling in a single story home with a triangular roofline.
Compare a gable roof with a flat vs cathedral ceiling.
If you re looking for a backyard room or roofed structure addition you most certainly want a bright and cheery space and this is just one of the roof shapes that will help you accomplish that goal.