Roof Eave Blocking

Construct a hidden roof intake vent at the top of the building wall by removing the wall top trim or top siding board cutting away any building sheathing or blocking at the wall top nailing 1 spacer blocks 16 on center nailing a new spaced out wall top trim board along the roof eaves and screening the opening against insects.

Roof eave blocking.

The definition of an unblocked diaphragm under 2302 1 does not require nailing to the edge blocking only to supporting members and specifically excludes blocking. If a part of your roof is in constant shadow it may have thicker ice than areas of the roof that get some sunlight. Homes with wood or shingle roofs are at high risk of being destroyed during a wildfire. The thick ice blocks snowmelt from reaching the gutter.

Build your roof or re roof with materials such as composition metal or tile. First as the photo shows the contractor assumes that when the rafters and blocking shrink they will not shrink beyond the 1 2 inch gap provided between the top of the vertical spacer block and the bottom of the sheathing. However it may run into frozen snow and ice inside the gutter or on the eave which doesn t receive heat transferred from the living area. I believe eave blocking is necessary to maintain a load path and avoid rotational forces on the rafter truss but i disagree with you that it is precriptively required by the code.

Block any spaces between roof decking and covering to prevent embers from catching. Provide at least 2 of free air space from the new lower roof eaves all the way to the original roof ridge. Before the roof sheathing goes on the open framing provides easy access for attaching the return blocking and the nailers for the rake soffit. 22 in x 3 in galvanized steel eave vent item 2180321 model ev223 1 8.

When you look at the open eave detail you see the rafter tails the blocking and the roof sheathing that extends beyond the exterior wall. Install perforated soffit intake venting in the roof overhang or eaves all along that edge. Bumps at the edge of the roof would be a sign that more space should have been provided. Remove blocking between the rafters at the top of the outer garage wall at the lower roof edge.