Normal roof slope for typical installation.
Minimum pitch for cedar shake roof.
Nailing schedule for wood shingles shakes.
At these pitches there is a possibility of some water penetration.
Metal roof shingles require a minimum roof pitch of 3 12 or greater.
This wood roof article describes the slope and exposure requirements for wood shake or wood shingle roofs and provides detailed instructions on how and where to nail or fasten wood shingles shakes on roofs.
Page 23 cedar care maintenance overview a word about topical treatments for installed roofs topical treatment products power washing the beauty of cedar download pdf page 24 coverage and exposure tables shingle coverage table 1 shingle exposure table 2 shake coverage table 3 shake exposure table 4 download pdf.
The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.
Wood shingle wood shake roof installation specifications.
Minimum pitch for cedar roofs.
The maximum width of flat grain shingles is 8 inches.
Wood shingles are more susceptible to leaks than composite or asphalt shingles because they don t lock as tightly or lay as flat as traditional shingles.
Handsplit red cedar shakes cedar shake shingle bureau the recognized authority sin ce 1915 sumas washington 604 820 7 700 certi split the premium grade of shingles for roofs and sidewalls.
The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.
If you desire a cedar roof for your home the ideal pitch for your roof ranges from a five pitch to a 12 pitch.
The minimum roof slope on which certi label shakes are recommended is 4 12 and for certi label shingles 3 12.
If 4 12 and above is normal and 2 12 is minimum what about properties with roofs in between the two such as a 3 12 pitched roof.
Asphalt shingles require a minimum roof pitch of 2 12 or greater.
Available 100 edge grain 100 all clear in 16 or 18 or 24 lengths.
As with asphalt shingles flashing at sidewalls should be stepped flashing not continuous flashing.
It is typical to see installations with slopes greater than these.
The minimum width for both shakes and shingles is 3 inches.
Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above.
These top grade shingles are 100 heartwood 100 clear and 100 edge grain.
Let us recap on the minimum roof pitch required for each type of roofing material.
Irc and ibc codes allow a minimum roof slope of 3 12 for shakes and shingles mansard roofs installation guidelines are found here.
At these low pitches 14 22 degrees care must be taken and a water impermeable vapour permeable underlay must be used underneath with a ventilated space between the membrane and the shingles.
Modern building codes require a minimum slope of 4 12 for shakes and 3 12 for shingles.
The minimum roof pitch for shingles and shakes is 14 degrees.
