1 Hour Roof Over Hang Protection

The existing open eaves have t g sheathing with exposed rafter tails and 2x blocking b w rafters.

1 hour roof over hang protection.

Walls less than 5 feet from the property lot line must be of a listed hour fire1 resistant construction. Eave overhang fire protection. To the centerline of a street an alley or public way. Roof overhangs must have a one hour fire protection on the underside when less than 5 from the property line and cannot project closer than 2 from the line.

Hi all we need to provide one hour rated protection for under eaves on a residential property remodel. See attached image we are hoping to replicate this in the addition. The ibc provides options while the irc has only one method of compliance. An overhang protects the upper portion of the wall that it is attached to from rainfall and it also shades the windows under it from the sun.

To the closest interior lot line. Ibc section 703 3 item 2. Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits. However a garage located within 2 of the property line is permitted to have a 4 inch roof eave projection.

Roof ceiling and attic separation. To an imaginary line between two buildings on the lot. Enclose overhangs with soffits that have a minimum 1 hour fire resistance rating to prevent embers and hot gases from making contact with the joists rafters or trusses or the underside of the roof decking. For complete information on the listed systems the actual listing or test report should be reviewed.

Madesign history contact. Soffits a soffit encloses the underside of sloped or flat roof overhangs. Wall framing whichever is closer to one of the following. Overhangs such as roof eaves and soffits are one element needing protection.

The ibc in section 705 2 3 permits the use of type iv construction fire retardant treated wood or 1 hr fire resistance construction for combustible projections. The irc in table r302 1 1 only.