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READ AND REMOVE THIS PAGE BEFORE PLACING
THE SPECIFICATION SECTION IN THE CONTRACT

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DIVISION 7:  THERMAL AND MOISTURE PROTECTION

SECTION 07514 ‑ BUILT‑UP BITUMINOUS ROOFING
(SMOOTH NAILABLE, SLOPE UP TO MIN 1/4-INCH/FT, MAX 1/2-INCH/FT)

USE:	Furnishing and installing a conventional built‑up roof. 

NOTES TO SPECIFIER:

	A.	Options within paragraphs are identified by enclosure in brackets; blank spaces enclosed by brackets [_____] provide for information to be inserted, as appropriate, to individual projects.

	B.	TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES, the specifier must edit (delete, substitute or add to the text).  The remaining paragraphs must be renumbered.

	C.	DELETE FOR FINAL COPY: Notes to the Specifier, located between lines of asterisks; all [brackets], underlining, boldface, and italics, within the paragraphs; and this page.  (Open Reveal Codes [alt F3] to do this accurately.)

	D.	To Edit “(Footer B)”: (Corel 8).  ENTIRE FOOTER SHOULD BE BOLDED.  Click in the footer and delete the “Project Name (ftr B)” text and replace it with the Name of the Project (upper and lower case).  Replace date with current MM/YY (WITHOUT BRACKETS).

	E.	The Guide Specifications are intended to be continuously reviewed and revised.  User’s technical comments are appreciated.  Also, other related or similar specification that are written “from scratch” that could benefit others, or other questions can be sent to NSTC A/E Group, ST 110, or call (303) 987-6868.

DRAWING DATA REQUIRED: 

REQUIRED SPEC MODIFICATIONS:

GENERAL NOTES

A. 	Whenever entire articles, paragraphs, or subparagraphs are not applicable, the articles, paragraphs, or subparagraphs should be deleted; when necessary, reletter or renumber articles, paragraphs, or subparagraphs.

B. 	THIS GUIDE IS NOT INTENDED AS A SUBSTITUTE FOR READING THE ENTIRE SECTION.

TECHNICAL NOTES

A. 	1.1B:  Select or add applicable specification sections.  Do not list specification sections from Division 7.

B. 	1.2:  Select or add applicable references.

C.	1.3A:  Select applicable specification section.

D.	1.3B:  Insert number of copies of the manufacturer's descriptive literature required.  Normally 5 copies are required.  Distribution after review is normally 1 copy to the COR, 3 copies to the Contractor, and 1 copy to the project file.

E.	1.3C:  Insert number of samples required.  Normally 2 samples are required.  Distribution after review is normally 1 sample to the COR, and 1 sample to the Contractor.

	F.	1.8:  Select applicable period.  Do not limit or void the provisions of the contract and Division 1, Section 01700 - Contract Closeout.

G.	4.1 and 4.2:  When a "lump sum" Contract is used, delete the title PART 4:  MEASUREMENT AND PAYMENT, and both articles from this specification section.  Measurement and payment will be addressed in Part 4 of Section 01009 or Section 01010.

REVISIONS OF THIS SECTION:
CSI format, editorial changes: 12/01
Metric:  
Technical Update: 09/92

SECTION 07514

BUILT-UP BITUMINOUS ROOFING
(Smooth Nailable, Slope min. 1/4-inch/ft, max. ½-inch/ft)

PART 1:  GENERAL

1.1  SUMMARY:

	A.	Section Includes:  Furnishing and installing a smooth surfaced 3‑ply fiberglass felt roofing membrane over a nailable deck with an incline of up to 1/2-inch per foot.

1.2  REFERENCES:

A.  American Society for Testing and Materials:
	ASTM D 41‑85		Asphalt Primer Used in Roofing, Dampproofing and Waterproofing
	ASTM D 312‑89  	Asphalt Used in Roofing
	ASTM D 2178‑89 	Asphalt Glass Felt Used in Roofing and Waterproofing
	ASTM D 2822‑91 	Asphalt Roof Cement
		ASTM D 2824-85	Aluminum-Pigmented Asphalt Roof Coatings
	ASTM D 3672‑86	Venting Asphalt-Saturated and Coated Inorganic Felt Base Sheet Used in Roofing

	B.  International Conference of Building Officials (ICBO):	
	UBC-1991	 		Uniform Building Code 

1.3  SUBMITTALS:

	A.	General:  Submittals shall be according to [Section 01009 ‑ General Information and Requirements.]  [Section 01300 ‑ Submittals.] [and] [Section 01365 - Certificates of Conformance.]

	B.	Manufacturer's Literature:  Submit [     ] copies of the manufacturer's descriptive data describing all materials and components of the roofing installation to be used on this project.

	C.	Samples:  Submit [     ] samples of the fiberglass felt, flashing, and base sheets of actual material to be used on this project.  Samples shall be 6 x 6 inches.

1.4  QUALITY ASSURANCE:

	A.	Contractor Qualifications:  The roofing contractor shall be approved by the roof system manufacturer, and all materials shall be installed according to the manufacturer's written instructions.

	B.	Installer Qualifications:  Workmen experienced as appropriate to the complexity of the work involved in such roofing applications.

C.  Failure Criteria:  Not limited to the following:
   	1.  Wrinkling or buckling of roof surface.
   	2.  Alligatoring or blistering of roof surface.
   	3.	Separation of insulation or roofing felts from adjacent materials above or below.
		4.	Fish mouths.

1.5  DELIVERY, STORAGE, AND HANDLING:

	A.	Storage:  Store on raised platforms, securely covered with waterproof tarpaulins to protect the materials from the weather and from contamination.  Plastic sheeting will not be acceptable as a protective covering.

1.6  PROJECT/SITE CONDITIONS:

	A.	Environmental Requirements:  Installation of roofing during inclement weather or when the air temperature is below 45 degrees F is hazardous to the satisfactory performance of finished roof and not allowed except as noted below:
   	1.	Remove all traces of ice and snow from deck before applying roofing.  Surface must be dry.
    	2.	Do not overheat asphalt to offset rapid chilling, but keep roofing roll close behind mop.  Mop no further than 5 feet in front of roll and broom all plies immediately after embedment.
    	3.	After membrane is completed, apply top glaze coat (if recommended by roof system manufacturer) the same day.

1.7  SEQUENCING AND SCHEDULING:

	A.	Other Trades:  All related work of other trades shall be properly installed and not adversely affect the installation or performance of the roofing system.

	B.	Discontinuous Surface:  The placing of electrical or other conduits, bolt heads, above the roof deck and below the roofing membrane will not be permitted.  Projections or openings in the deck shall have been completed prior to the application of the roofing.

1.8  WARRANTY:

	A.	Requirements:  Furnish a written warranty from the manufacturer covering the [__________________] according to Section 01007 - Contract Closeout.  The warranty period shall extend for a minimum of [__] years.

PART 2:  PRODUCTS

2.1  MATERIALS:

	A.	Base Sheet:  No. 25 asphalt saturated inorganic venting base sheet, according to ASTM D 3672 Type II, one layer.

	B.	Finishing Felt:  No. 15 asphalt‑saturated fiberglass finishing felt, according to ASTM D 2178 Type IV, three layers.

	C.	Flashing Sheet:  Asphalt‑impregnated fiberglass flashing sheet, according to ASTM D 2178.

	D.	Asphalt primer:  Shall meet the requirements according to ASTM D 41.

	E.	Asphalt (between plies and glaze coat):  Shall be according to ASTM D 312, Type III.

	F.	Roofers cement (trowel application):   Shall be according to ASTM D 2822 Type II.

	G.	Fibrated aluminum coating:  Shall be according to ASTM D 2824 Type II and have bright aluminum reflective finish.

	H.	Nails:  Regular head roofing nails, barbed, flat head, diamond point, one inch No. 12 ga minimum driven through flat tin disks.

PART 3:  EXECUTION

3.1  EXAMINATION:

	A.	Roofing Surfaces:  Surfaces to receive roofing materials shall be sound, clean, smooth, dry and free of debris, loose material or defects which would have an adverse effect on the roofing application or performance.

3.2  PREPARATION:

	A.	Nailers:  The Contractor shall provide wood nailers at all edges and openings, as indicated on drawings, where metal flanges or flashings shall be installed.

	B.	Cleaning:  Immediately before application of roofing, thoroughly clean surface of roof deck.

	C.	Envelope Strips:  Install at eaves, edges, and around roof openings to prevent drippage of asphalt.
    	1.	Prior to application of roofing, nail one continuous strip of coated base sheet 10 inches wide to the wood nailer provided, allowing 1/2 the width to extend past edge of roofing.

3.3  INSTALLATION:

	A.	Venting Base Sheet:  Using base sheet, start with an 18 inch width. Apply following felts full width, lapping each felt 4 inches over preceding one.  Provide end laps not less than 6 inches and staggered a minimum of 12 inches.  Nail the laps at 9 inch centers and down the center of each felt nail two rows of nails with rows spaced approximately 11 inches apart and nails staggered on approximately 18 inch centers.  Use nails or fasteners appropriate to the type of subsurface. 

	B.	Roofing Felts:  Over entire surface, starting at low point of roof, mop a uniform coating of roofing asphalt, approximately 25 lb/100 ft².  Do not heat over 475 degrees F.  Apply at 400 to 450 degrees F.
    	1.	Use starting strips of felt cut 12 inches and 24 inches wide followed by full width sheets, each laid in hot asphalt.  Lap each ply 24‑2/3 inches over preceding ply.
    	2.	Mop full width of sheet with a continuous coating of roofing asphalt (approximately 25 lb/100 ft²) so that felt does not touch felt.  Spot‑mopping, strip‑mopping, and solid‑mopping with insufficient material will not be allowed, and any evidence of these practices will constitute cause for removal and replacement of affected work at Contractor's expense.  Broom each ply to assure complete embedment.  Extend all plies to top of cant and cut plies evenly at wall line.

	C.	Parapet Flashing:  Over the roofing from a point 3 inches out from the base of the cant, on the cant, and over the wall surfaces to immediately below the point where the metal cap flashing occurs, apply a uniform trowel coating of 35 lb/100 ft² of roofers cement.  Into this embed one‑ply of No. 18 fiberglass felt (perforated).  Lap ends 3 inches and cement.  Over this entire surface apply a second uniform trowel coating of roofers cement at 35 lb/100 ft² into which embed one‑ply of flashing sheet.  Lap ends 3 inches and cement.

	D.	Base Flashing:  Flashing shall extend from one inch below metal cap, down wall, over cant strip, and 6 inches onto roof deck.  Embed base sheet in a uniform coating of roofers cement.  Nail to wall one inch below top edge 12 inches oc through flat tin disks.  Lap 3 inches and cover joint with 4 inch strip of finishing felt cemented in place.  Over entire surface of base flashing, apply a uniform brush coat of aluminum‑fibered coating at the rate of one gal/100 ft².

	E.	Glaze Coat:  When recommended by roof system manufacturer, over the entire roofing membrane surface apply a uniform coat of asphalt at the rate of 10 to 15 lb/100 ft².

	F.	Fascia/Gravel Stops:  Prime flanges with asphalt primer.  Set flanges in a trowel coating of roofers cement on top of completed roof membrane.  Nail flanges 3 inches oc in a line 3/4 inch from flange edge and strip with one‑ply of flashing strip 9 inches wide mopped solidly in asphalt.

	G.	Fibrated Aluminum Coat:  Allow asphalt at laps or glaze coat (if utilized) to age as recommended by coating manufacturer.  Remove dust and dirt by brushing or vacuuming.  Stir coating well and apply at a rate of 1-1/2 gallons/100 ft².  Coating may not be diluted.  Application may be by brush, medium (3/4 inch) nap roller, or heavy duty spray equipment.  In extremely hot weather when rolling or brushing, spread immediately after application to prevent abnormal evaporation and premature drying.

3.4  ADJUSTING:

	A.	After roofing has been applied:  Fold the coated base sheet envelope strip (see 3.02C above) back over the top of the roofing and cement it in place with roofers cement.

3.5  PROTECTION:

	A.	General:  Protection for the roofing system, during and after installation shall be provided to guard against possible damage from other trades working in the roof area.

PART 4:  MEASUREMENT AND PAYMENT

4.1  METHOD OF MEASUREMENT:

	A.	Units:  The work described in this section will not be measured for payment.

4.2  BASIS OF PAYMENT:

	A.	Payment:  No direct payment for the work described under this section will be made.  The Contractor shall include consideration for this item in the bid price for other items of the Contract.

END OF SECTION

BUILT-UP BITUMINOUS ROOFING
(Smooth Nailable, Slope min. 1/4-inch/ft, max. ½-inch/ft)
[12/01]
Project Name (ftr B)