The rating appears as two numbers.
Roof deck inspection.
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.
Existing roof decks compliance schedule 3 1 existing roof decks which have been previously permitted through the inspectional services department must comply with the.
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.
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.
Roofing over any of these problems is asking for trouble later on in your home s life.
The maximum span for roof sheathing is limited by the stresses and deflections caused by the design loads.
During the deck inspection every square foot of the plywood needs checked for problems.
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.
Tall 4 x 4 posts twist under load and 4 x 4 posts even when treated decay below grade too quickly.
Although deck inspections are visual only inspections inspectors may want to dig down around posts and perform pick tests just below grade level to look for decay.
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.
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.
Plank sheathing usually 1 6 or 1 8 was used as a roof deck before plywood.
After the inspection you should receive a comprehensive written report with photos of any outstanding issues.
This inspection is conducted to evaluate roof shingles roof penetration flashing eaves and rake gutter and downspout systems.
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.
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.
Nailing or progress inspection.
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.
What needs to be checked during a 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 labels above are common apa rating labels for roof sheathing.
