Roof Deck Inspection

Roofing over any of these problems is asking for trouble later on in your home s life.

Roof deck inspection.

In the first half of the 20th century roofs in missouri were built with wood shingles over planks spaced about 1 apart. The inspection agencies include a span rating label on the panels which indicates the maximum spans for that panel. The image above depicts a high deck being supported with 4 x 4 posts. In addition to the six steps in the inspection procedure applicable to all types of decks there are four more steps in the procedure for inspecting steel decks as follows.

This inspection is conducted to evaluate roof shingles roof penetration flashing eaves and rake gutter and downspout systems. Nailing or progress inspection. These problems could show up in the form of water damage dry rot de lamination if plywood cupping if ship lap or 1 inch boards and general damage. To qualify for wind mitigation credits it s essential to have a roof that has the proper amount of nails with the proper length and design to withstand the most wind.

Tall 4 x 4 posts twist under load and 4 x 4 posts even when treated decay below grade too quickly. Wood shingle are expensive so when these roofs need to be torn off and replaced it is cheaper to resheath the entire roof and go over it. This measures on a scale of 1 weakest to 3 strongest how well your roof is attached to the rafters of the frame on your home. Also the roof will be evaluated from the attic and check the components such as the structure of the trusses rafters sheathing ventilation insulation and roof penetrations.

The rating appears as two numbers. Plank sheathing usually 1 6 or 1 8 was used as a roof deck before plywood. Pre inspection bothell and kenmore prior to the installation of an additional layer of roofing material over an existing layer s. Roof decks accessed through a single access point within owner occupied units.

Existing roof decks compliance schedule 3 1 existing roof decks which have been previously permitted through the inspectional services department must comply with the. After the inspection you should receive a comprehensive written report with photos of any outstanding issues. What needs to be checked during a roof deck inspection. Securement note whether all steel deck panels are securely welded or mechanically fastened to the structural supports.

Roofs not accessible to tenants or alarmed in accordance with cbc 9 9 13 3. The maximum span for roof sheathing is limited by the stresses and deflections caused by the design loads. A professional deck inspection cost typically ranges from as low as 25 for a 30 minute inspection to as high as 199 for a one hour inspection including a structural check safety check and common building code violations check. During the deck inspection every square foot of the plywood needs checked for problems.