HomeMy WebLinkAbout0267.98.51a. Lap so water flows over or parallel to, but never
roof with at least one additional ply of modified bitumen ply sheet
07530.15
REFERENCES:
07530.31
PREPARATION:
against the laps.
2. Lap 2" on sides and 6" on ends.
embedded into asphalt. Extend this ply a minimum of eight inches
beyond the flange onto the roof.
A.
American Society for Testing and Materials (ASTM) applicable
standards.
A.
Deck Preparation:
1. Provide smooth, clean, dry deck, free of debris, and sufficiently
3. Extend to the top of the cant strip at curbs, walls, and
3. Mop over the stripping ply to ensure embeddment. Seal cut
B.
Underwriter's Laboratories (U.L.) Building Materials Directory.
rigid to support the roofers and their mechanical equipment without
D.
07520.34
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similar locations.
4. Nail on 9" centers through the laps and 18" centers along
lines 12" distant from each edge.
Provide valleys and Waterways with an extra layer of base sheet.
Provide this extra ply at least 36" wide and extend at least 8" up the
inclines out of the valley and lay prior to the application of the
modified bitumen ply sheet. Embed the full 36" width in hot asphalt
applied at the nominal rate of 25 lbs. per 100 square feet.
APPLICATION OF MODIFIED BITUMEN PLY SHEET:
Shingle in ply sheets, free of buckles or fishmouths.
Apply ply sheets by rolling into a hand mopping of asphalt. The
practice of unrolling the modified bitumen ply sheet, then re- rolling
it into the asphalt is preferred.
Apply ply sheets so that the flow of water is over or parallel to, but
never against, the lap.
Apply side laps at least 4" with end laps a minimum of 6" and offset a
minimum of 12" apart.
Embed the full 36" width of each ply in hot asphalt applied at the
nominal rate of 25 lbs. per 100 square feet.
"Brooming In" is required under normal conditions to insure full
embeddment into asphalt mappings.
When "Rolling In" by hand, keep the mopping asphalt within 6' of the
roll.
Keep mop full and flow asphalt on the roof. Do not scrub with mop.
Do not "glaze in" ply sheet during the interim between surfacing.
Cut and repair fishmouths, wrinkles, tears, buckles or other damage in
any ply on a ply for ply basis. Install additional plies set into hot
bitumen over the cuts. Mop the full width under each layer. No dry
laps are permitted. Feather felts 2" over preceding layers.
K. Extend all ply sheets to the top of the cant strip, solidly adhered
without bridging or buckling.
L. Surfacing sheet must be applied within 30 days.
edges of surfacing sheet with roof cement.
F. Protection Pads:
1. Install walkway protection pods at heavy traffic areas such
as around serviceable roof -top equipment and in front of roof
access areas.
2. Space protection pads approximately one to two inches apart
to allow for water flow.
3. Set walk pad into a five spot application of roof cement over
the final surfacing.
4. Place protection material to underlie pipe support blocking,
extending at least two inches beyond the blocking on all sides and
spot - adhere to the surfacing sheet.
07520.37 CLEAN UP:
A. Remove bituminous or other markings from finished surfaces. Keep the
roof and premises clean and free from accumulations of waste materials
and rubbish at all times. Remove all debris, scrap, and rubbish from
the work area daily. Promptly remove surplus materials and all
equipment from the site upon completion of the work. Prior to final
acceptance, restore all areas affected by this work to their original
state of cleanliness and repair all damage done to the premises, by
workmen and equipment.
END
DIVISION 7 - THERMAL AND MOISTURE PROTECTION
SECTION 07530 - SINGLE PLY ROOFING SYSTEM
07530.1 GENERAL
07530.11 RELATED DOCUMENTS:
A. Drawings, Specifications, Division 1 and Contract
C. Factory Mutual (F.M.) Approval Guide and applicable Loss Prevention
Data Sheets.
D. Manufacturers' current applicable roofing specifications catolog(s).
07530.16 PRODUCT HANDLING:
A. Do not apply wet materials nor proceed with roofing application during
wet weather or when moisture is on roof deck.
B. Deliver materials to jobsite in original, unopened packaging with
legible labels. Insure that package labels are imprinted with product
name, production date, product code and testing agency.
C. Store materials in dry, protected areas in upright position. When
stored outdoors, store on pallets above ground and cover top and all
sides with suitable protective sheet or tarpaulin. Do not double -stack
pallets on the job site. Shrink wrap packaging is not intended for
long -term jobsite storage. Remove upon arrival at jobsite and replace
with a watertight breathable covering.
D. Select and handle materials and equipment in such a way as to avoid
damage to materials, existing construction, or applied roofing.
E. Do not load or permit any part of structure to be loaded with a
weight that will endanger its safety or cause damage. Confine
equipment, storage of materials and debris and the operations and
movements of workmen within any limits as indicated or as directed by
the Owner or his Representative.
F. Take every precaution to prevent interior leakage, materials
falling into the interior, or other such occurrences. Accomplish
installation of materials in such a manner that material drippage does
not occur.
G. Mark any wet, damaged or defective material and remove from the job
site that some day. Promptly replace this material at no cost to the
Owner.
07530.17 GUARANTEE AND WARRANTY:
A. Contractor's Warranty Agreement:
B.
07530.32
C.
D.
E.
F.
deflection that will strain or rupture any of the roofing
components.
2. Make any significant depressions, holes, deformations, and similar
faults smooth prior to new roofing application.
3. Clean all surfaces of debris and of any moisture before
proceeding with application of roofing material.
4. Refer to Manufacturers General Requirements for appropriate
substrate requirements.
Deck Inspection:
1. Contractor is responsible for insuring that the roof surface is
clean, firm, smooth, dry, properly secured against movement, and
acceptable to the Manufacturer and to himself, prior to application
of roofing materials.
2. Commencement of roof application over any section will denote
acceptability by Contractor of any section's readiness to receive
roofing and he will be responsible for any corrective work which
may be occasioned by his having started over on unsatisfactory
surface.
GENERAL APPLICATION REQUIREMENTS:
A. Do not conduct operations when water in any significant form is
present on deck, such as rain, dew, ice, frost, or snow. Limit water
to containers for human consumption.
B. Take precautions to keep materials clean, dry and free of damage.
Do not start application of more materials each day than can be
completed within the some day.
At the end of the day, edge -seal the finished portion of the roofing
system completed that day according to manufacturers recommendations.
Remove edge seals prior to the start of the next days work
Start roofing work in dry weather only and without threat of immediate
inclement weather. Keep the roofed area of the building watertight
each day as the work progresses.
Use only materials and procedures that are proper and suitable for the
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07520.35
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M. Light priming may be required if any surface oxidation has
occurred.
APPLICATION OF MODIFIED BITUMEN SURFACING SHEET:
Provide clean roof surface, free of dust, dirt or moisture when
surfacing sheet is applied.
07530.12
DESCRIPTION:
A. Work Included:
1. Single Ply Roofing
2. Separation Layer
3. Membrane Flashing
4. Wall Covering
1. For a two -year period from the date of completion and Owner
acceptance, Contractor agrees to inspect and make necessary repairs
to defects or leaks in the roof and fleshings. Attend to emergency
leaks to within twenty -four (24) hours from receipt of notice from
the Owner. As soon as weather permits, restore affected areas to
standards of this contract without voiding the Manufacturer
slopes and for the underlying materials to which they are attached.
G. Provide approved and operable fire extinguishers at all times on
the roof. Follow all additional requirements of OSHA Safety
Regulations.
H. Mark all roof terminations and openings waterproof at the end of
each day's work.
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07520.36
A.
B.
Apply surfacing sheet free of buckles, wrinkles, blisters, fishmouths
or voids of any type between the sheet and the mopping asphalt.
Apply surfacing sheet applied over and parallel to the underlying
roofing and lapped so that the flow of water is over or parallel to,
but never against, the laps.
Lap surfacing sheet with 4" side laps and 6" end laps.
Break end laps not less than 3 feet apart.
Embed surfacing sheet in hot asphalt applied at a nominal rate of 25
lbs. per 100 square feet.
Cut surfacing sheet into 12' to 18' lengths.
Flop surfacing sheet into place. Place tension on the ends of the
surfacing sheet lengths as they are flopped into place to ensure that
the sheet lays flat in the asphalt.
" Brooming in may be necessary under certain conditions to ensure bond
between asphalt and sheet.
For clean, finished surface, embed loose granules into overrun of hot
asphalt at side and end laps while still hot.
Weather conditions, such as temperature, wind, sun, etc. must be given
consideration when the temperatures get below 50'F., as cracking,
wrinkles, non - adhesion and fishmouths are more likely to occur. The
pre- cutting and stacking of surfacing sheet will reduce application
problems in these instances.
FLASHING INSTALLATION:
General flashing specifications:
1. Do not apply flashing until the roof membrane (excluding surfacing)
has been laid. Provide temporary seal at ply terminations until
installation of flashing.
2. Prime all sheet metal that will come in contact with bituminous
materials with an asphaltic primer and allow to dry before applying
bitumen.
Base Flashing:
1. Embed an additional modified bitumen ply sheet ply into a solid
mopping of steep asphalt over junctures, extending to the top of
the curb or eight to ten inches up the wall. Extend this ply at
least two inches beyond the cant strip, onto the roof. Over the
preceding ply, apply the modified bitumen surfacing /flashing sheet
into a solid mopping of steep asphalt. Provide the flashing sheet
of sufficient width to extend from the top edge of the flashing
surface to a minimum of four inches past the toe of the cant strip,
onto the roof.
2. Completely bond all flashings to the underlying surface without any
looseness, bubbles, or voids. Remove and replace any loose
flashing materials.
3. Fasten the top edge of the base flashing approximately every
six inches on center with appropriate fasteners through one inch
diameter metal discs.
4. Seal all inside and outside corners with roof cement. Cover
all exposed roof cement with aluminum coating or embedded granules.
5. Apply separate wall covering as described below.
C. Wall Covering:
1. Apply fiberglass base sheet over the wall, extending from the
top of the wall and down to overlap the base flashing by at least
two inches. Fasten to wall using a shower pattern, spacing nails
no more than 12 inches apart in all directions.
2. Back -mop the modified bitumen flashing sheet and apply
vertically into a solid mopping of hot asphalt directly over the
nailed base sheet. Extend wall flashing from the top outside edge
of the wall and down to overlap the base flashing by at least four
inches.
3. Fasten the top edge of the wall flashing approximately every
six to eight inches on center with appropriate fasteners through
one inch diameter metal discs. Blind nail inside vertical laps
spacing fasteners at 12" o.c. maximum.
07530.13
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07530.14
5. Roofing accessories and incidentals
QUALITY ASSURANCE:
A. Possess /maintain, on site, a copy of specifications, MSDS sheets,
related documents, all pertinent drawings and any addendum infor
motion.
B. Project quality control is the Contractor's responsibility and
obligation. Nothing contained herein or stated implies any obligation
by the Owner or his Representative(s) to Contractor by performing such
field observation, nor does field observation relieve Contractor of
any responsibility under the terms of the contract.
Comply with local, state and federal regulations, safety standards and
codes. Use the strictest document when a conflict arises.
D. Maintain a full -time supervisor /foreman on the job site during
times that roofing work is in progress, having a minimum of five (5)
years experience in roofing work similar in nature and scope to speci
fied roofing. Have the some person continue on the project through
final acceptance, unless the persons performance on the project is
not acceptably adequate or impedes project productivity.
Have a copy of these specifications on the job at all times during
application and refer to some for proper application methods.
Whenever specification items found herein are less stringent than
Manufacturers' requirements, follow Manufacturers' requirements.
Be responsible for meeting fire regulations. Locate a certified fire
extinguisher of adequate size on the roof and elsewhere as required.
Special precautions may be necessary when installing the roof system
at temperatures below 45'F to insure satisfactory application and
performance.
I. Maintain internal quality control through instruction, supervisory
inspection, and knowledgeable personnel for a proper installation
without taking test cuts. This, however, does not limit the Owner's
right to request cuts be taken by the Contractor and repaired as
indicated by the Manufacturer and approved by the Owner.
The responsibility for proper installation of all components of the
roofing system lies with the Contractor. Inform the Owner of any
conditions detrimental to the quality of construction or long -term
performance of the roofing system and do not proceed with the work
until the conditions are corrected.
The Contractor selected for this work must be approved by the primary
materials Manufacturer, capable of providing the specified guarantees.
L. Flood Test:
1. Conduct a 48 hr. flood test of the completed roof system by
the Contractor in the presence of the Roofing Consultant. Provide
and /or arrange for all necessary equipment, supplies, water, and
similar items, as needed to perform this test. Flood test must be
completed and verified prior to filing for substantial completion.
SUBMITTALS:
A. Submit to Architect Prior to Pre - Application Conference and Job
Start:
1. Samples.
a. Sheet membrane products (8- 1/2"x11'.
b. Roof Separation Product.
c. Fasteners (bagged and labeled).
2. Copy of guarantee application submitted to and initially
approved by the Manufacturer.
3. Material Safety Data Sheets (MSDS) for all products
containing "Hazardous Materials" as defined on lists issued by both
the Federal and State governments. Maintain copies of MSDS sheets
B.
07530.2
07530.21
07530.22
A.
B.
C.
guarantee and repair any damages from these leaks without cost to
the Owner, except for leaks caused by abuse to roof by others or by
abnormal weather conditions such as lightning, severe hail, or
other unusual climatic phenomena. This Guarantee must be submitted
to the Owner, in writing, before final payment is released for the
project.
Manufacturer Guarantee:
1. Submit to the Owner, Manufacturer's unlimited penal sum
guarantee covering any and all repairs /replacements to keep the
roof, including the field and flashing, watertight for, period of
ten (10) years beginning at the time of the Owners acceptance of
final product. Cost of this guarantee is borne by the Contractor.
2. Execute this guarantee by the primary Roofing Manufacturer to
over any and all costs for repairs necessary to stop leaks which
occur resultant of, but not limited to, the following:
a. Deterioration of the roofing membrane or base flashing
system resulting from ordinary wear and tear by the elements.
b. Workmanship on the part of the approved Roofing
Contractor in application of the roofing membrane or base
flashing system.
c. Blisters, fishmouths, bare spots, ridges, or wrinkles
in the roofing membrane.
d. Splits or cracks in the roofing membrane not caused by
structural movement.
e. Slippage of the roofing membrane or base flashing.
C. If, 24 hours after notification of roof leakage Contractor has not
responded, Owner has the right, without invalidating his Guarantees
and at the expense of the Contractor, to make any emergency temporary
repairs that are required in order to protect the building and its
contents from damage due to roof leakage.
PRODUCTS
ACCEPTABLE MANUFACTURER(S):
A. JPS Elastomerics
B. Burkeline Roofing Systems
C. Carlisle
D. Haartz Mason
MATERIALS:
Roofing System:
1. Provide single ply roofing system comprised of the following
major components and having a UL Class "A" fire rating.
Roof Membrane:
1. Material: Minimum 45 mil (.045 ") thick polyester- reinforced
uncured Chlorosulfonated Polyethylene (CSPE /Hypalon). Provide
prefabricated "half sheets" as required for perimeter securement.
2. Manufacturer and Brand: Manufacturer's standard product.
3. Nominal Weight: 30 -42 lbs. per 100 sq. ft.
4. Exposed Color: White
Flashing Membrane:
1. Material: Minimum 45 mil (.045 ") thick Chlorosulfonated
Polyethylene (CSPE /Hypalon) with or without reinforcement as
required by manufacturer for application.
2. Manufacturer and Brand: Manufacturer's standard product.
3. Exposed Color: White
D. Separation Layer:
1. Material: As recommended and approved by membrane
manufacturer and /or required for UL Class A rating.
2. Manufacturer and Brand: Approved by Membrane Manufacturer
and acceptable for appropriate UL rating.
3. Thickness: As required.
07530.33
B.
07530.34
SEPARATION LAYER:
A. Provide a separation layer between the roofing membrane and plywood
deck as recommended and approved by the roofing system manufacturer
and Underwriters Laboratories to comply with requirements for a UL
Class A fire rated assembly. Separation layer may include any one of
the following components.
Insulation (or exterior gypsum board):
1. Provide wood noilers if needed to accommodate securement at
roof perimeters and /or roof penetrations, as required by membrane
manufacturer.
2. Lay insulation boards in an ashlar (cross) pattern (joints
staggered) with the joints between the long dimension of the boards
continuous.
3. Space roof insulation 1/4" from all vertical fleshings.
4. Neatly cut insulation and fit around all through -roof
projections.
5. Do not lay more insulation than can be completely covered in
a day's work.
6. Cut out damaged insulation out and replace with minimum
12 "x12" sections of new insulation secured in place.
7. Remove and replace any wet insulation. Do not apply roofing
over wet insulation.
8. Provide tapered roof insulation around roof drains.
9. Secure insulation to deck with screw /plate fasteners using an
F.M. 1 -90 securement pattern, but not less than six (6) fasteners
per 4'x4' insulation board.
C. Slip Sheet:
1. Install slip sheet between roof deck and membrane in
accordance with manufacturer and /or UL
requirements /recommendations.
2. Remove and replace any slip sheet material that is wet or
damaged.
MEMBRANE INSTALLATION:
A. Cut sheets to maximum size possible in order to minimize seams.
Install membrane so that the flow of water is over or parallel to, but
never against, the laps.
B. Install a minimum of two (2) half -wide sheets of appropriate
membrane at the perimeter of each roof section /level with full sheets
installed over the field of the roof.
C. Mechanically fasten each membrane sheet using appropriate membrane
fasteners and disks placed within the membrane overlap. Install
placement of membrane and spacing of fasteners comparable to FM 1 -90
approval as submitted prior to job start. Remove and replace any
loose or poorly secured fasteners.
D. Overlap adjacent membrane sheets at least four (4) inches (4.5"
minimum is required for membranes with selvage edge). If necessary to
obtain a positive weld, clean and /or prepare the overlap area per
manufacturer's recommendations and wipe dry. If Hypalon membrane is
allowed to cure, follow manufacturers recommendations for preparation
of the membrane prior to welding.
E. Provide minimum 1.5" to maximum 2" continuous hot air or solvent
weld at all areas where membrane overlaps. Use a roller to apply
pressure to seams in conjunction with welding to insure a positive
weld. Check the full length of all seams using a probe with a well -
rounded point. Apply appropriate lap sealant at all exposed cut
edges.
F. For any areas where the integrity of the weld is suspect, or where
membrane defects occur such as fishmouths, wrinkles, punctures or
voids in the seam area, patch such areas using the some membrane
material. Using a rounded patch sized to extend at least six inches
beyond the defect in all directions, prepare and patch the area in
accordance with manufacturer's instructions. Apply lap sealant at all
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4. Install new metal cap coping over top of wall to overlap and
seal the top of the wall flashing.
Drain Flashing:
1. Remove drain ring prior to roofing application.
2. Extend base and ply sheet into the drain under the clamping
at the job site.
4. Letter of certification from the primary Manufacturer stating
that the system specified or proposed is appropriate for the
geographical area and type deck, and that the specified re
quirements are either acceptable or exceed their requirements for
E.
Membrane (and insulation) Fasteners:
1. Type: Factory Mutual approved fastener with cap plate as required
for deck type.
2. Manufacturer and Brand: Approved by Membrane Manufacturer.
3. Screw Length: As required by manufacturer for deck type.
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exposed edges of the patch.
G. Cold Weather Precautions /Limitations:
1. No welding or adhesive application are allowed in
temperatures below 35oF.
2. Refer to membrane manufacturer's recommendations for cold
ring.
3. Set a four lb. lead sheet into a solid coating of roof cement
over the installed ply sheet. Extend the lead sheet at least 6"
beyond the outside of the drain bowl. Shape the sheet to conform
snugly to the underlying taper. Prime lead sheet and cover with
modified bitumen stripping ply extending at least 6" beyond the
edge of the lead sheet. Cover with appropriate surfacing. Extend
all plies, including the base and ply sheet, stripping ply, lead
sheet and surfacing sheet, into the drain, under the clamping ring.
4. Set the drain ring in roof cement and securely tighten over
the drain flashing components.
5. After complete installation of the roofing system, inspect
the specified guarantees. Note any items not acceptable or
detrimental to system performance prior to bid for review and clari
fication.
5. Approved applicator certification letter from Manufacturer.
6. Current product literature, installation specifications and
details.
7. Prior to job start, submit evidence of Underwriters Laboratories
(UL) Class A listing for proposed roof system as well as all
applicable membrane layout, fastening patterns, special
requirements or instructions, and similar directions.
8. Where roofing or flashing requirements vary from those
described herein or on details, submit shop drawings and /or
F. Fasteners for Wood and Masonry Flashings:
1. Type: Wood nails, minimum 11 gauge, barbed, galvanized with 5/8"
head. . Masonry nails, case hardened. One inch diameter tin caps
must be used.
2. Manufacturer. Submitted and approved Manufacturer.
3. Size: Sufficient length to penetrate 3/4" minimum.
G. Protection Pads:
1. Material: Minimum 30" wide roof protection material composed of
reprocessed rubber and synthetic binders or reinforced Hypalon
material.
2. Manufacturer and Brand: Approved by Membrane Manufacturer.
H. Bonding Adhesive:
weather application.
3. At lower temperatures, the speed and temperature of the hot
air welder may need to be adjusted to allow heat to absorb into the
colder membrane. Several test welds may be required in order to
determine proper machine settings.
4. At temperatures below 5OoF, store adhesives in a temperature
regulated "hot box" in order to maintain adhesives at room
temperature.
5. At lower temperatures, adhesives may" require a longer open
time in order to allow solvents to adequately flash off prior to
adhesion.
6. Any surface condensation must be removed prior to welding.
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roof drains and test to assure that no clogging of the drainage
system is present. Provide roof drain leader in such condition
that the full diameter of the drain leader is clear.
specifications to describe proposed modifications prior to job
start.
B. Submit During Project:
1. Material: Contact adhesive used to secure flashing membranes in
place. Do not use on seams.
2. Manufacturer and Brand: Manufacturer's standard product.
Do not assume that frost or condensation will be completely removed
during the welding operation.
97125
E. Flanged Sleeves and Accessories:
1. Any shop drawings or other requested information.
C. Submit Upon Completion
1. Roofing Guarantee and Warranty.
I. Miscellaneous Accessories:
1. Lap sealants, caulking compounds, primers, solvents,
overnight seal, separator sheets, Hypalon -clad metal, and similar
07530.35
A.
FLASHING INSTALLATION:
Do not apply flashing until the roof membrane has been laid, Provide
temporary seal at membrane terminations until installation of
PRM YPE ISSUE DATE
2/1/97.1
1. Set flanges into roof cement over the installed roof plies
and fasten securely to the underlying deck (fastening is not
required for lead flanges).
2. Prime all flanges, including pipe flashing sleeves, flanged
units, scuppers, and similar items on both sides and flash on the
2. Letter of certification stating that the products and
installation performed on the project comply with contract
requirements, that any punch list items from the final inspection
have been resolved and that the work is complete.
07530.3
items to be as supplied or approved by the primary membrane
manufacturer.
EXECUTION
flashing.
B. Extend horizontal field membrane to the base of vertical surface at
walls, curbs, pipes, and similar items and cut even. At internal roof
drains, extend membrane into the drain, under the clamping ring area.
Secure the membrane along the base of walls and around roof
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