The official guidelines from the cssb regarding red cedar shingles are as follows.
How wide are shingles roofing.
These are still considered standard asphalt shingle dimensions.
Architectural roof shingles are a premium type of asphalt shingle.
How many nails will you need.
Rolls of felt are 36 wide x 144 long for 15 and 72 long for 30.
Also known as dimensional or laminated shingles architectural roof shingles are made in a wide variety of colors.
Consider other underlayment options as needed such as rubber or tar products.
When applying the new shingles each shingle course will be covered by a step flashing.
Iko was among the first roofing material manufacturers to introduce the metric size roofing shingle defined as being 13 1 4 inches long by 39 3 8 inches wide.
Architectural roofing shingles were developed in the 1970 s and are commonly used in new construction and on roof replacement projects.
For shingles wider than 10 inches 254mm drive two additional nails approximately 1 inch 25mm apart near the center.
Metal step flashing pieces there are two simple rules to follow.
Cedar shingles up to 10 inches 254mm wide require two corrosion resistant nails driven 3 4 inch 19mm from each edge and 1 inch 25mm above the exposure line.
Once upon a time traditional strip or 3 tab shingle dimensions as well as asphalt shingle dimensions measured 12 inches wide by 36 inches long.
Roof planes that butt against vertical walls at the end of the shingle course are protected by metal step flashing at least 125 mm high and 125 mm wide 5 high and 5 wide.