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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 07513 ‑ BUILT‑UP BITUMINOUS ROOFING
(GRAVEL-SURFACED 1/2-INCH TO 3-INCH SLOPE/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 copies of the materials list 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.

F.	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 01010.

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

SECTION 07513

BUILT-UP BITUMINOUS ROOFING
(Gravel-Surfaced, ½-inch to 3-inch)

PART 1:  GENERAL

1.1  SUMMARY:

	A.	Section Includes:  Furnishing and installing a gravel surfaced 3‑ply fiberglass felt roofing membrane over a nailable deck with an incline of between 1/2 and 3 inches/ft.

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 1863‑86 	Mineral Aggregate Used on Built‑Up Roofs
	ASTM D 2178‑89 	Asphalt Glass Felt Used in Roofing and Waterproofing
	ASTM D 2626 E1-86 	Asphalt‑Saturated and Coated Organic Felt Base Sheet Used in Roofing
ASTM D 2822‑91	Asphalt Roof Cement

	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.] [and] [Section 01300 - Submittals.] [and] [Section 01365 - Certificates of Conformance.]

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

	C.	Materials List:  Submit [     ] copies of the list of materials proposed to be used on this project.

1.4  QUALITY ASSURANCE:

	A.  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:  Provide raised platforms and securely cover with waterproof tarpaulins to protect the materials from the weather and from contamination.  Plastic sheeting is not acceptable as a protective covering.

1.6  PROJECT/SITE CONDITIONS:

	A.	Environmental Requirements:  Installation of roofing during inclement weather or when 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 ice and snow from deck before applying roofing.  Surface must be dry.
		2.	Do not overheat asphalt to offset rapid chilling.  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 flood coat and surfacing material the same day.

1.7  SEQUENCING AND SCHEDULING:

	A.	General:  Related work of other trades shall be properly installed and not adversely affect the installation or performance of the roofing system.

PART 2:  PRODUCTS

2.1  MATERIALS:

	A.	Base Felt:  Coated Fiberglass Base Felt, according to ASTM D 3378.

	B.	Finishing Felt:  Number 15 asphalt‑saturated fiberglass finishing felt, according to ASTM D 250, two layers.

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

	D.  Asphalt primer:  Shall be according to ASTM D 41.

	E.	Asphalt (between plies and flood coat):  Shall be according to ASTM D 312, Type 3.

	F.	Roofers cement (trowel application):  Shall be according to ASTM D 2822, Group 1.

	G.  Aluminum fibered coating.

	H.	Nails:  Regular head roofing nails, barbed, flat head, diamond point, one inch Number 12 ga minimum driven through flat tin disks.

	I.	Gravel:  Shall be 1/2 to 3/4 inch, according to ASTM D 1863.

PART 3:  EXECUTION

3.1  PREPARATION:

	A.	Surface Preparation:  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.  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.  Immediately before application of roofing, thoroughly clean surface of roof deck.

	B.	Prior to Application of Roofing:  Nail one continuous strip of coated base sheet 10 inches wide to the wood nailer provided, allowing 1/2 width to extend past edge of roofing.

3.2  INSTALLATION:

	A.	Envelope Strips:  Install at eaves, edges and around roof openings to prevent drippage of asphalt.
    	1.	After roofing has been applied, fold the coated base sheet strip back over the top of the roofing and cement it in place with roofers cement.

	B.	Base Sheet:  Using coated fiberglass base felts full width, lap each felt 2 inches over preceding one.  Nail the laps at 9-inch centers.  Down the longitudinal 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 deck. 

	C.	Roofing Felts:  Over entire surface, starting at low point of roof, mop a uniform coating of roofing asphalt (approximately 23 lb/100 ft²) into which, while hot, embed two plies of asphalt‑saturated fiberglass felt.  Do not heat over 400EF.
	1.	Use starting strips of felt cut 18 inches wide followed by full width sheets.  Lap each ply 19 inches over preceding ply.
    	2.	Mop full width of sheet with a continuous coating of roofing asphalt (approximately 23 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 all plies evenly at wall line.
    	3.	Flood surface with asphalt (60 lb/100 ft²) and while hot embed gravel at 400 lb/100 ft².

	D.	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. 15 fiberglass felt.  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.

	E.	Base Flashing:  Nail base flashing to the wall one inch below the top edge.  Use nails specified 12 inches oc driven through flat tin disks.  Over the entire surface of the base flashing, apply a brush coat of aluminum fibered coating at the rate of one gal/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.

3.3  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.	ab	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
(Gravel-Surfaced, ½-inch to 3-inch)
[12/01]
Project Name (ftr B)