Hips and Ridges

factory-applied adhesive unless adhesive is located 16 mm 5/8 inch

or closer to top of cutouts. Place fasteners so they are

concealed by shingle top lap and penetrate the head lap.

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NOTE: At the text below, for application of

shingles on mansard roofs and other steep roofs with

slopes more than 1.75 in one 21 inches per foot,

require that tabs be cemented with asphalt roof

cement.

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NOTE: Delete item "b" and include items "c" and "d"

for projects located in Bermuda and where:

1. Basic wind speed is 161 kilometers per hour (kph)

100 miles per hour (mph) and eave is 6100 mm 20

feet or higher above grade; or

2. Basic wind speed is 177 kph 110 mph.

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b.

Shingles applied with nails: Nominal 125 mm 5 inch exposure.

Apply each shingle with minimum of four nails. Place one nail 25

mm one inch from each end, and evenly space nails on a horizontal

line a minimum of 16 mm 5/8 inch above top of cutouts. [Cement

each tab with one spot of asphalt roof cement placed 25 to 50 mm

one to 2 inches from bottom edge of shingle.]

[c.

Nailing: Apply shingles with nominal 125 mm 5 inch exposure.

Apply each shingle with minimum of six nails. Place one nail 25 mm

one inch from each end and one nail on each side of each cutout,

on a horizontal line 16 mm 5/8 inch above cutouts.]

[d.

Sealing: Seal each tab with continuous, 225 mm 9 inchlong, 6 mm

1/4 inch diameter bead of asphalt roof cement, applied to the

surface of course below. Place bead on horizontal line 16 mm 5/8

inch above cutouts so bead will be 25 mm one inch from bottom edge

of tab to be sealed and so bead will not show through cutouts.

After nailing each shingle, press tabs down to ensure spreading

and bonding of asphalt roof cement.]

3.3.5

Hips and Ridges

Form with 225 by 300 mm 9 by 12 inch individual shingles or with 300 by 300

mm 12 by 12 inch shingles cut from 300 by 900 mm 12 by 36 inch strip

shingles. Bend shingles lengthwise down center with equal exposure on each

side of hip or ridge. Lap shingles to provide a maximum 125 mm 5 inch

exposure, and nail each side in unexposed area 140 mm 5 1/2 inches from

butt and 25 mm one inch in from edge.

3.3.6

Valleys

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NOTE: Closed cut and woven valleys are preferred

method for strip shingles, but open roll roofing and

open sheet metal valleys may also be specified as

Contractor options.

SECTION 07311

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