In areas where the average daily temperature in january is 25f 4c or less or where there is a possibility of ice forming along the eaves causing a backup ofwater themetal valley flashing underlayment shall be solidly cemented to the roofing underlayment for slopes under seven units vertical in 12 units horizontal 58 percent 2006 international building code 271 roof assemblies and rooftop structures slope or self adhering polymer modified bitumen sheet shall be installed.
Ibc flashing roof.
Flashing shall be installed at wall and roof intersections at gutters wherever there is a change in roof slope or direction and around roof openings.
The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures.
Flashing is very important and is generally repeated in both the wall ibc 1404 4 and roof provisions of the code.
The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.
R903 2 2 crickets and saddles.
The weep screed may be made for galvanized metal plastics or aluminum.
Where flashing is of metal the metal shall be corrosion resistant with a thickness of not less than 0 019 inch 0 5 mm no.
Where flashing is of metal the metal shall be corrosion resistant with a thickness of not less than 0 019 inch 0 483 mm no.
The new icc 600 standard is the residential design standard for hurricane resistant construction replacing sstd 10 and to reference the astm d7158 standard.
Typically they should be set at or below the foundation plate line to allow moisture to exit or weep out and to prevent ground moisture from wicking up.
The minimum required thermal resistance varies depending on insulation placement relative to other materials.
One of the most critical elements of the roof system is the flashing component.
Ibc 2012 s section 1510 1 general indi cates materials and application methods used for re covering or replacing existing roof systems must comply with the same re quirements as new roof systems except reroofing projects need not comply with the code s minimum 12 slope require ment for roofs that provide positive drainage.
The ibc includes the principle that flashing shall be installed to prevent moisture from entering the wall or to redirect that moisture to the exterior.
This roofing code implies that flashings must be designed and installed on all roof systems and that they must be in compliance with the system manufacturer s design and material application requirements.
Weep screeds are common and code required ibc section 2512 for cement plaster over framed walls.
Test standards such as astm d7158 are available to provide performance metrics for asphalt shingles.
