Roof Shape

Roof shape is one of the most common items incorrectly reported on the OIR 1802 form.

If you read the form carefully, the definition of a Hip roof is a Hip shaped roof with NO OTHER ROOF SHAPE greater than 10% of ANY major wall length.

If there is a gable over a garage and the garage sits on its own wall, the ENTIRE ROOF is classified as Other. If there is one gable greater than 50% of an elevation or wall length, the ENTIRE ROOF is classified as Other. If the roof is all Hip except for a flat portion over a porch that is structurally connected to the roof system and greater than the 10% rule, the ENTIRE ROOF is classified as Other and not Hip.

“Other” requires that the roof be ANY OTHER SHAPE or combination of shapes other than Hip.

Flat roof designations under the new wind mitigating report, relates to multi-family dwellings (5 or more units) where at least 95% of the roof shape slope is flat.