Cathedral Roofs With Raftors

A truly open or cathedral ceiling provides a clear unobstructed view to the underside of the roof s rafters.

Cathedral roofs with raftors.

Now cathedral style roofs with exposed timbers can be incorporated into a home or building design while being insulated to provide a feeling of spaciousness in living areas something that is particularly relevant as homes footprints get smaller. The other common case is the cathedral or vaulted ceiling. Cut and insert 1 or thicker high r foam insulation sheets r 8 per inch against the furring giving a 1 or greater air path between the insulation and the roof deck under the cathedral ceiling. The first case is when the ceiling joists are oriented perpendicular to the rafters.

You would be surprised how small these gusset plates can be yet they provide sufficient strength to prevent a roof collapse. If you use these gusset plates you will end up with a small flat ceiling area near the peak of the cathedral ceiling. Nail 1 furring along every rafter side against the roof deck. They are glued and nailed to the sides of the roof rafters.

But for certain kinds of roof configurations wood i joists may work better than dimension lumber long span cathedral ceilings are a good example. Following ten years of extensive testing isoboard thermal insulation has developed a proven solution to fixing its thermal insulation boards above rafters trusses or beams. A vaulted roof features angled rafters that rest on wall plates and connect at the top to a ridge beam. In pitched roof systems such as hip roofs and gable end roofs collar ties and ceiling joists span across the ceiling space and obstruct the view.

Without the tie at the bottom the rafters must be supported at their upper end to prevent the rafter thrust at the lower end.