USACE / NAVFAC / AFCESA / NASA UFGS-07 31 13 (April 2006)
------------------------------
Preparing Activity: NAVFAC Replacing without change
UFGS-07311 (February 2003)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 07 31 13
ASPHALT SHINGLES
04/06
NOTE: This guide specification covers the requirements for asphalt shingle
roofing, surfaced with mineral granules, including roofing felt, ridge vents,
underlayments, and flashings.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestions on this guide specification are welcome and should
be directed to the technical proponent of the specification. A listing of technical
proponents, including their organization designation and telephone number, is
on the Internet.
Recommended changes to a UFGS should be submitted as a Criteria Change Request
(CCR).
NOTE: For a more detailed description of asphalt shingle roofing and requirements
for asphalt shingle reroofing over existing asphalt shingles, wood shingles,
roll roofing, or built-up roofing, see the "Residential Asphalt Roofing Manual,"
published by Asphalt Roofing Manufacturers Association (ARMA) and "The NRCA
Steep Roofing Manual," published by the National Roofing Contractors Association
(NRCA). Avoid reroofing with asphalt shingles over more than one layer of existing
roofing material.
NOTE: On the drawings, show:
1. Pitch of substrate/shingle roofing
2. Detail of crickets and flashings at chimneys
3. Detail at eave/rake corner of roof including underlayment, drip edge, starter
strip, shingle exposure, shingle courses, and fastener placement.
PART 1 GENERAL
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text will automatically be deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
[ASTM INTERNATIONAL (ASTM)ASTM D 1970(2008) Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam ProtectionASTM D 226(2006) Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and WaterproofingASTM D 3018(2003) Class A Asphalt Shingles Surfaced With Mineral GranulesASTM D 3462(2007) Asphalt Shingles Made From Glass Felt and Surfaced with Mineral GranulesASTM D 41(2005) Asphalt Primer Used in Roofing, Dampproofing, and WaterproofingASTM D 4586(2007) Asphalt Roof Cement, Asbestos-FreeASTM D 4869(2005; R 2006) Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope RoofingASTM D 6380(2003) Standard Specification for Asphalt Roll Roofing (Organic Felt)][NATIONAL ROOFING CONTRACTORS ASSOCIATION (NRCA)NRCA 0408(Fifth Edition) Steep-slope Roofing Manual][UNDERWRITERS LABORATORIES (UL)UL 790(2004; Rev thru Oct 2008) Test Methods for Fire Tests of Roof CoveringsUL 997(1995; Rev Jul 1998) Wind Resistance of Prepared Roof Covering Materials]1.2 DEFINITIONS
1.2.1 Top Lap
That portion of shingle overlapping shingle in course below.
1.2.2 Head Lap
The triple coverage portion of top lap which is the shortest distance from the butt edge of an overlapping shingle
to the upper edge of a shingle in the second course below.
1.2.3 Exposure
That portion of a shingle exposed to the weather after installation.
1.3 SUBMITTALS
NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Submittals should be kept to the minimum required for adequate
quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, a code of up
to three characters within the submittal tags may be used following the "G"
designation to indicate the approving authority. Codes for Army projects using
the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO"
for District Office (Engineering Division or other organization in the District
Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project
Office. Codes following the "G" typically are not used for Navy, Air Force,
and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are [for Contractor Quality Control approval.][for information only. When used, a designation following the
"G" designation identifies the office that will review the submittal for the Government.] The following shall
be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
SD-03 Product Data
Shingles
Submit data including type, weight, class, UL labels, and special types of underlayment and
eave flashing.
[SD-04 Samples
NOTE: Select color according to local practice, except use light-reflective
colors for air conditioned buildings. Where color is specified in paragraph
entitled "Asphalt Shingles," delete the requirement for submittal of color charts.
Shingles[; G][; G, [_____]]
Full shingle sample and manufacturer's standard size samples of materials and products requiring
color or finish selection.
[Color charts[; G][; G, [_____]]]
]SD-08 Manufacturer's Instructions
Application
1.4 DELIVERY AND STORAGE
Deliver materials in the manufacturer's unopened bundles and containers bearing the manufacturer's brand name.
Keep materials dry, completely covered, and protected from the weather. Store according to manufacturer's written
instructions. Roll goods shall be stored on end in an upright position or in accordance with manufacturer's
recommendations. Immediately before laying, roofing felt shall be stored for 24 hours in an area maintained
at a temperature not lower than 10 degrees C. 50 degrees F.
1.5 WARRANTIES
NOTE: The warranty clauses in this guide specification have been approved by
the Government. The paragraphs may be used without any request for waiver.
Warranties shall begin on the date of Government acceptance of the work.
1.5.1 Manufacturer's Warranty
NOTE: Specify 30-year warranty for projects remotely located and subject to
severe wind loadings; for example, in Bermuda. Specify the 25-year warranty
for other projects. Minimum warranty period shall extend beyond (1) one year.
Furnish the asphalt shingle manufacturer's standard [25 year] [30 year] [other] warranty for the asphalt shingles.
The warranty shall run directly to the Government.
1.5.2 Contractor's Warranty
The Contractor shall warrant for 5 years that the asphalt shingle roofing system, as installed, is free from
defects in workmanship. When repairs due to defective workmanship are required during the Contractor's warranty
period, the Contractor shall make such repairs within 72 hours of notification. When repairs are not performed
within the specified time, emergency repairs performed by others will not void the warranty.
PART 2 PRODUCTS
2.1 MATERIALS
2.1.1 Shingles
NOTE: For structures located adjacent to Air Force Facilities, high light reflectance
colors should not be used where resultant glare would be objectionable to pilots.
Edit this paragraph for the correct weight of shingle required for the project.
Heavyweight inorganic mat type shingles will be used for ARHOC 81 Barracks or
similar designs for permanent construction which utilize shingles. Omit fungus
resistance if not required.
Hip and ridge shingles may be made from the strip shingle tabs or may be of
a separate design. Generally, hip and ridge shingles cut from self-sealing
individual full shingle tabs perform best.
NOTE: For projects located in Bermuda, use the bracketed requirement for 14.2
kilogram 290 pound shingles.
NOTE: Specify fungus-resistant shingles for projects located in climates having
high humidity most of the time.
Mineral granule-surfaced asphalt shingles, self-sealing, square tab, strip [, fungus-resistant]. [ASTM D 3018
, Type I, and ASTM D 3462] [, weighing not less than 10.3 kilograms per square meter 210 pounds per 100 square
feet] [, architectural shingles weighing not less than 14.2 kilograms per square meter 290 pounds per 100 square
feet]. Shingles shall meet the fire resistance requirements of UL 790 for Class A and the wind resistance requirements
of UL 997. Color shall be [_____] [as selected from the manufacturer's standard color charts]. Shingle color
shall be [in accordance with COLOR SCHEDULE] [_____].
2.1.2 Mineral-Surfaced Asphalt Roll Roofing
ASTM D 6380.
2.1.3 Smooth-Surfaced Asphalt Roll Roofing
ASTM D 6380, Type II.
2.1.4 Underlayment
NOTE: Choose Type I or Type II from the text below. Type I is the minimum accepted.
Type II is a heavy duty felt. Edit according to project requirements.
Asphalt-saturated felt conforming to ASTM D 4869 or ASTM D 226, [Type I, number 15,] [Type II, number 30,] without
perforations or other material specified by the shingle manufacturer for use as underlayment.
2.1.4.1 Leak Barrier Underlayment
Self-adhering leak barrier or ice dam underlayment shall comply with ASTM D 1970 for sealability around nails.
2.1.5 Self-Adhering Membrane
Self-adhering rubberized asphaltic membrane, a minimum of one mm 40 mils thick, and recommended by the shingle
manufacturer for use as eaves flashing.
2.1.6 Nails for Applying Shingles and Asphalt-Saturated Felt
Aluminum or hot-dipped galvanized steel or equivalent corrosion resistant with sharp points and flat heads 10
to 11 mm 3/8 to 7/16 inch in diameter. Shank diameter of nails shall be a minimum of 2.67 mm 0.105 inch and
a maximum of 3.43 mm 0.135 inch with garb or otherwise deformed for added pull-out resistance. Nails shall be
long enough to penetrate completely through or extend a minimum of 20 mm 3/4 inch into roof deck, whichever is
less, when driven through materials to be fastened.
2.1.7 Asphalt Roof Cement
ASTM D 4586, Type II.
2.1.8 Asphalt Primer
ASTM D 41.
2.1.9 Ventilators
NOTE: Drawings should detail type of ridge vent required. For aluminum ridge
vents, see Section 07 60 00, FLASHING AND SHEET METAL.
Ventilation should be required with a total net free ventilating area of not
less than 1 to 150 of the area of the space ventilated. The total area is permitted
to be reduced to 1 to 300, provided at least 50 percent and not more than 80
percent of the required ventilating area is provided by ventilators located
in the upper portion of the ventilated space at least 914 mm (3 feet) above
eave or cornice vents, with the balance of required ventilation provided by
eave or cornice vents. As an alternative, the net free cross-ventilation area
may be reduced to 1 to 300 when a vapor barrier having a transmission rate not
exceeding 1 perm is located on warm side of the attic insulation.
2.1.9.1 Nailable Plastic Shingle Over Type Ridge Vents
Ridge vents shall be constructed of UV stabilized nailable rigid polypropylene material, approximately 0.30 m
1 foot wide and 25 mm 1 inch thick, and shall be in 1.2 m 4 foot long interlocking sections with self-aligning
ends or corrugated polyethylene rigid roll or rigid strip ridge vent with aluminum wind deflectors on each side.
Vents shall be designed to prevent infiltration of insects, rain, and snow.
2.1.9.2 Nailable Mesh Shingle Over Type Ridge Vents
Ridge vents shall be constructed of UV stabilized nailable polyester mesh material, approximately 0.30 m one
foot wide. Vents shall be designed to prevent infiltration of insects, rain, and snow.
PART 3 EXECUTION
3.1 VERIFICATION OF CONDITIONS
Ensure that roof deck is smooth, clean, dry, and without loose knots. Roof surfaces shall be firm and free from
loose boards, large cracks,and projecting ends that might damage the roofing. Vents and other projections through
roofs shall be properly flashed and secured in position, and projecting nails shall be driven flush with the
deck.
3.2 SURFACE PREPARATION
Cover knotholes and cracks with sheet metal nailed securely to sheathing. Flash and secure vents and other roof
projections, and drive projecting nails firmly home.
3.3 APPLICATION
Apply roofing materials as specified herein unless specified or recommended otherwise by shingle manufacturer's
written instructions
[or by NRCA 0408].
3.3.1 Underlayment
NOTE: Select the applicable paragraph(s) from the following.
The installation of asphalt strip shingles at maximum exposure is not recommended
on roofs having a slope of less than 1:4.
In locations where the January mean temperature is minus one degree C (30 degrees
F) or less, a leak barrier underlayment membrane should be used. The leak barrier
underlayment membrane may consist of: two plies of No. 15 asphalt saturated
felt, one nailed to the deck and the second set in Type III or Type IV hot asphalt
or asphalt lap cement; a heavyweight coated base sheet nailed to the deck and
another felt ply or plysheet set in hot asphalt or asphalt lap cement; or a
self adhering modified bitumen membrane.
NOTE: In locations where the average daily January temperature is minus 4 degrees
C 25 degrees F or below, use the second optional paragraph instead of the first
optional paragraph.
[Provide for roof slopes one in three 4 inches per foot and greater. Apply one layer of shingle underlayment
to roof deck. Lay underlayment parallel to roof eaves, starting at eaves. Provide minimum 50 mm 2 inch head
laps, 100 mm 4 inch end laps, and 150 mm 6 inch laps from both sides over hips and ridges. Nail sufficiently
to hold until shingles are applied. Turn up vertical surfaces a minimum of 100 mm 4 inches.]
NOTE: These requirements are intended primarily for roof slopes between one
in 6 and one in 3 2 and 4 inches per foot. They should not be specified for
roof slopes one in 3 4 inches per foot and greater unless the condition of the
note above is met. Delete bracketed sentence unless eave flashing is required.
[Provide for roof slopes [between one in 6 2 inches per foot and one in 3 4 inches per foot] [one in 34 inches
per foot and greater]. Apply two layers to roof deck. Provide a 480 mm 19 inch wide strip as starter sheet
to maintain specified number of layers throughout roof. Lay parallel to eaves, starting at eaves. Provide minimum
480 mm 19 inch head laps, 150 mm 6 inch laps from both sides over hips and ridges, and 300 mm 12 inch end laps
in the field of the roof. Nail sufficiently to hold until shingles are applied. Turn up vertical surfaces a
minimum of 100 mm 4 inches. [When a self-adhering membrane is used for eave flashing, start underlayment from
upper edge of eave flashing.]]
3.3.2 Drip Edges
NOTE: Specify 4 inch spacing for nails for roofs in high wind areas.
Provide metal drip edges as specified in Section 07 57 13 FLASHING AND SHEET METAL applied directly on the wood
deck at eaves and over the underlayment at rakes. Extend back from edge of deck a minimum of 75 mm 3 inches,
and secure with nails spaced a maximum of [100] [250] millimeters [4] [10] inches o.c. along inner edge.
3.3.3 Starter Strip
NOTE: Delete the first bracketed phrase unless eave flashing is specified.
Otherwise, delete the second bracketed phrase.
NOTE: Include the next to last bracketed sentence and delete the last bracketed
sentence unless the project is located in Bermuda.
Apply starter strip at eaves, using 225 mm 9 inch wide strip of mineral-surfaced roll roofing of a color to match
shingles. Optionally, use a row of shingles with tabs removed and trimmed to ensure that joints are not exposed
at shingle cutouts. Apply starter strip along eaves, [overlaying and finishing even with lower edge of eave
flashing strip] [overhanging the metal drip edge at eaves and rake edges 6 to 10 mm 1/4 inch to 3/8 inch]; fasten
in a line parallel to and 75 to 100 mm 3 to 4 inches above eave edge. Place nails so top of nail is not exposed
in cutouts of first course of shingles. [When roll roofing is provided, seal tabs of first course of shingles
with asphalt roof cement.] [Fasten with 6 nails per strip of shingles or space nails at 150 mm 6 inches o.c.
for roll roofing. Seal tabs of first course of shingles with asphalt roof cement as specified below.]
3.3.4 Shingle Courses
NOTE: Shingles with the correct recommended exposure shall be applied in accordance
with the manufacturer's printed instructions as they appear on the bundle wrapping.
Start first course with full shingle, and apply succeeding courses with joints staggered at thirds or halves.
Butt-end joints of shingles shall not align vertically more often than every fourth course. Apply shingle courses
as follows:
a. Fastening: Do not drive fasteners into or above the 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.
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.
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.
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
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.
[Provide either closed cut, woven, open roll roofing, or open sheet metal valleys.]
3.3.6.1 Closed Cut Valleys
Provide 900 mm 36 inch wide valley lining of single layer of smooth-surfaced or mineral-surfaced roll roofing,
with mineral-surface facing down, for full length of valley as follows:
a. Center lining in valley over underlayment. Provide minimum 300 mm 12 inch end laps in the
lining and seal laps with asphalt roof cement. Fasten lining to hold it in place until shingles
are applied.
b. Apply first regular course of shingles along eaves of one of the intersecting roof planes
and across valley. Extend course at least 300 mm 12 inches onto adjoining roof.
c. Apply succeeding courses in same manner as first course, extending across valley and onto
adjoining roof.
d. Press shingles tightly into valley and nail in normal manner, except apply nails not closer
than 150 mm 6 inches to valley centerline, and apply additional nail in top corner of each shingle
crossing valley.
e. Apply shingles on the adjoining roof plane, starting along eaves and across valley onto
previously applied shingles. Trim overlapping courses back to a line parallel to and a minimum
of 50 mm 2 inches back from valley centerline.
f. Trim 25 mm one inch on a 45 degree angle from upper corner of each end shingle. Embed end
shingles in a 75 mm 3 inch wide band of asphalt roof cement.
3.3.6.2 Woven Valleys
Provide valley lining as specified for closed cut valley. Lay valley shingles over lining by either of the following
methods:
a. Method I: Apply regular shingles on both roofs simultaneously. Weave each course in turn
over the valley. Lay the first regular course of shingles along eaves of roof up to and over
valley. Extend course along adjoining roof deck at least 300 mm 12 inches. Carry first regular
course of shingles of adjoining roof over valley on top of previously applied shingles. Lay
succeeding courses alternately, weaving valley shingles over each other for full length of valley.
b. Method II: Apply regular shingles on each roof surface separately to a line about 900 mm
3 feet from center of valley, and weave valley shingles in place later, as specified for Method
I.
In following either method, press shingles tightly into valley, and fasten in normal manner; except apply nails
not closer than 150 mm 6 inches to valley centerline, and apply additional nail in top corner of terminal shingle
on both sides of valley.
3.3.6.3 Open Roll Roofing Valleys
Provide 450 mm 18 inch wide strip of mineral-surfaced asphalt roll roofing, of a color to blend with asphalt
shingles, and with granular surface facing down, for the full length of valley as follows:
a. Center roll roofing strip in valley over underlayment. Lay centered in valley over felt
underlayment and with granular face down. Nail strip only enough to hold in place. Apply nails
in rows 25 mm one inch from each edge. As fastening along second side proceeds, press strip
firmly into valley.
b. Center second strip 900 mm 36 inches wide in valley and lay it over first strip with granular
face exposed and nail as specified for 450 mm 18 inch strip.
c. Before applying roofing shingles, snap two chalk lines for full length of valley. Locate
each line 75 mm 3 inches from centerline of valley at top, and increase width between lines
by 25 mm for each 2440 mm one inch for each 8 feet of valley length, continuing to eaves.
d. Apply a 50 mm 2 inch band of asphalt roof cement along each edge of 900 mm 36 inch strip
from edge to chalk line. Cut regular shingle courses true along valley chalk lines, and nail
in normal manner.
3.3.6.4 Open Sheet Metal Valleys
Sheet metal flashing for valleys is specified in Section 07 57 13 FLASHING AND SHEET METAL. Before installing
and fastening flashing in place with metal cleats:
a. Install single layer of 900 mm 36 inch wide, asphalt-saturated felt, centered on valley
and extending entire length of valley over felt underlayment.
b. Cut regular shingle courses on each roof on true line 50 mm 2 inches from valley centerline
at top of valley, and increase width between lines by 25 mm for each 2440 mm one inch for each
8 feet of valley length, continuing to eaves.
c. Apply 50 mm 2 inch band of asphalt roof cement over flashing, along and under side of shingles
adjoining valley.
d. Press shingles tightly into cement, and nail in normal manner, except apply nails not closer
than 125 mm 5 inches to valley centerline. Do not drive nails through valley flashing.
e. Provide a 100 mm 4 inch band of asphalt roof cement for fastening shingle tabs down along
open metal gutters.
3.3.7 Flashing
3.3.7.1 Eave Flashing
NOTE: Select the applicable paragraph(s) from the following.
NOTE: Where the average daily January temperature is minus 4 degrees C 25 degrees
F or below or where there is the chance of ice dams forming along the eaves,
use the second optional paragraph instead of the first optional paragraph.
In areas where the architect/engineer has determined that eave flashing is not
commonly provided, do not include either paragraph.
[Provide for roof slopes one in 3 4 inches per foot and greater. Provide eave flashing strips consisting of
smooth-surfaced roll roofing. Flashing strips shall overhang metal drip edge 6 to 10 mm 1/4 inch to 3/8 inch
and extend up the slope far enough to cover a point 300 mm 12 inches inside interior face of exterior wall.
Where overhangs require flashings wider than 900 mm 36 inches, locate laps outside exterior wall face. Laps
shall be at least 50 mm 2 inches wide and cemented with asphalt roof cement over entire length of lap. Lap end
300 mm 12 inches and cement.]
NOTE: The requirements below are intended primarily for roof slopes between
one in 6 and one in 3 2 and 4 inches per foot. They should not be specified
for roof slopes one in 3 4 inches per foot and greater unless the condition
of note above is met.
[Provide for roof slopes [between one in 6 and one in 3 2 inches per foot and 4 inches per foot] [one in 34 inches
per foot and greater]. Provide either of the following types of eave flashing:
a. From the eaves to a point 600 mm 24 inches inside interior wall line, apply solid coating
of asphalt roof cement between overlapping layers of underlayment. Spread cement to a uniform
thickness at rate of 7.5 liters per 10 square meters 2 gallons per 100 square feet of cemented
roof area.
b. From the eaves to a point 600 mm 24 inches inside interior wall line, apply one layer of
self-adhering membrane. Follow membrane manufacturer's printed installation instructions.]
3.3.7.2 Stepped Flashing
For sloping roofs which abut vertical surfaces, provide stepped metal flashing as specified in Section
07 57 13 FLASHING AND SHEET METAL.
3.3.7.3 Vent and Stack Flashing
Apply shingles up to point where vent or stack pipe projects through roof, and cut nearest shingle to fit around
pipe. Before applying shingles beyond pipe, prepare flange of metal pipe vent flashing as specified in Section
07 57 13 FLASHING AND SHEET METAL, by applying a 3 mm 1/8 inch thick coating of asphalt roof cement on bottom
side of flashing flange. Slip flashing collar and flange over pipe, and set coated flange in 2 mm 1/16 inch
coating of asphalt roof cement. After applying flashing flange, continue shingling up roof. Lap lower part
of flange over shingles. Overlap flange with side and upper shingles. Fit shingles around pipe, and embed in
2 mm 1/16 inch thick coating of asphalt roof cement where shingles overlay flange.
[3.3.7.4 Chimney Flashing
NOTE: Delete this paragraph unless a chimney is indicated on the project drawings.
Coordinate with Sections 06 10 00, and 07 60 00, to ensure that crickets and
metal chimney flashing are specified.
Provide treated wood crickets as specified in Section 06 10 00 ROUGH CARPENTRY. Provide metal base and counterflashing
as specified in Section 07 57 13 FLASHING AND SHEET METAL. Uniformly coat masonry surfaces which are to receive
flashing with asphalt primer applied at rate of 4 liters per 10 square meters one gallon per 100 square feet.
Apply shingles over underlayment up to front face of chimney. Apply metal front base flashing with lower section
extending at least 100 mm 4 inches over shingles. Set base flashing in a 2 mm 1/16 inch coating of asphalt roof
cement on shingles and chimney face. Apply metal step flashing at sides in a coating of asphalt roof cement.
Embed end shingles in each course that overlaps step flashing with asphalt roof cement. Apply metal rear base
flashing over cricket and back of chimney in coating of asphalt roof cement. Apply end shingles in each course
up to cricket, and cement in place. Lap base flashing minimum of 75 mm 3 inches with metal counterflashing.
]