Instructions / Assembly

Installation on Space Sheathing
Doing It Right
• Every third or fourth course, measure from the eaves up to the butts of
end shingles and snap a chalk line to align butts of the next course of
shingles.
• To allow for expansion of a pre-finished shingle, space shingles 3 mm to 6
mm (1/8 in. to 1/4 in.) apart. (Depending on degree of humidity.)
• Offset adjacent shingle courses by at least 4 cm (11/2 in.). For heavy snow
regions, increase to 5 cm (2 in).
• Do not let two joints line up directly in any three courses.
• Use two nails at 2 cm (3/4 in.) from each edge of the shingle and 4 cm
(11/2 in.) above the exposure or butt of the succeeding course.
• Avoid cutting shingles at ridge by shortening exposures of last few courses
installed below ridge.
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