1、*USACE / NAVFAC / AFCESA / NASA UFGS-07 31 26 (August 2009)-Preparing Activity: USACE SupersedingUFGS-07 31 26 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2009*SECTION 07 31 26SLATE ROOFING08/09*NOTE: This guide specification covers the require
2、ments for slate roofing on new construction and on historic buildings which require replacement, reinstallation, or repair of slate roofs.Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert a
3、ppropriate 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 proponent
4、s, 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).*PART 1 GENERAL1.1 REFERENCES*NOTE: This paragraph is used to list the publications cited in the text of the guide specification.
5、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 Wizards Check Reference feature when you add a RID outside of the Sections Reference Article to automatically place the reference in the
6、 Reference Article. Also use the Reference Wizards Check Reference feature to update SECTION 07 31 26 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-the issue dates.References not used in the text will automatically be deleted from this sectio
7、n 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
8、B 370 (2009) Standard Specification for Copper Sheet and Strip for Building ConstructionASTM C 406 (2006e1) Roofing SlateASTM D 146 (2004) Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing and WaterproofingASTM D 226 (2006) Standard Specification for Asphalt-Saturated Organi
9、c Felt Used in Roofing and WaterproofingASTM D 412 (2006ae1e2) Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - TensionNATIONAL ROOFING CONTRACTORS ASSOCIATION (NRCA)NRCA 0405 (2001; R 2003, 5th Ed) Roofing and Waterproofing ManualSHEET METAL AND AIR CONDITIONING CONTRACTOR
10、S NATIONAL ASSOCIATION (SMACNA)SMACNA 1793 (2006) Architectural Sheet Metal Manual, Sixth Edition, Second Printing1.2 SYSTEM DESCRIPTIONSalvage and reuse intact and serviceable existing slate materials whenever possible. New slate being incorporated into existing slate roofs shall match existing as
11、closely as possible. Use slate from the same quarry or manufacturer as the original, if possible. Establish units of work, including removal of existing materials, preparation of existing surfaces and application of underlayment, nailers, and related temporary and/or permanent flashing. The progress
12、ion of work shall be laid out and presented to the Contracting Officer to prevent other trades from working on or above completed roofing. Do no store materials on roof decks in such a manner as to overstress and/or damage the deck and supporting structure. Avoid placing of loads at midspans of fram
13、ing so that superimposed loads are well distributed. Vertical surfaces which project through the roof surface at a right angle to the slope of the roof shall have a cricket (sometimes referred to as a saddle) built into the roof to divert water away from the back of the vertical member, as shown. SE
14、CTION 07 31 26 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-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 t
15、he 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 c
16、an be reviewed through the Contractors 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 followin
17、g 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
18、; 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“
19、 designation; submittals not having a “G“ designation are for Contractor Quality Control approval. information only. When used, a designation following the “G“ designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 0
20、0 SUBMITTAL PROCEDURES:SD-02 Shop DrawingsDrawings; G; G, _Drawings showing slate installation and appearance details, flashing details, and nailing patterns for the slates.SD-03 Product DataQualificationsDocumentation showing qualifications of personnel proposed to perform the roofing work, and a l
21、isting identifying prior installations completed by the Contractor.SECTION 07 31 26 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SD-04 SamplesSlateAccessories for Slate RoofsThree representative shingles to show color range.Sealants237 mL 8
22、ounces of each type.Underlayment Membrane300 by 300 mm 1 by 1 foot section.FastenersRepresentative samples of each fastener with identifying tags.SD-07 CertificatesMaterialsCertificates of compliance attesting that the materials meet specification requirements.1.4 QUALITY ASSURANCEProvide qualified
23、workers, trained and experienced in installing slate roofing systems of this configuration, and submit documentation of 5 consecutive years of work of this type. Show familiarity with and perform work in accordance with SMACNA 1793 and NRCA 0405. As proof of Qualifications, provide a list of install
24、ations made identifying when, where, and for whom the installations were made. Submit drawings as specified in the Submittals paragraph, under SD-02.1.5 DELIVERY, STORAGE, AND HANDLINGDeliver materials in manufacturers unopened bundles and containers with the manufacturers brand and name marked clea
25、rly thereon. Store shingles in accordance with manufacturers printed instructions and roll goods on-end in an upright position. Immediately before laying, store roofing felt for 24 hours in an area maintained at a temperature not lower than 10 degrees C 50 degrees F.1.6 PROJECT/SITE CONDITIONSPerfor
26、m slate roofing operations when existing and forecasted weather conditions permit work in accordance with manufacturers recommendations and warranty requirements. Apply elastomeric membrane underlayment only in fair weather when air and surface temperatures are above 5 degrees C 40 degrees F. Provid
27、e temporary protection materials maintained on the site at all times for temporary roofing, flashing, and other protection when delays and/or changed weather conditions do not permit completion of each unit of work prior to the end of each working day. Remove and discard materials which have been us
28、ed for temporary roofing, flashing and other protection.SECTION 07 31 26 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1.7 WARRANTYFurnish a warranty against defects in material and workmanship of slate roof assembly, including related metal
29、flashing for a period of 10 years from date of final acceptance of the work.PART 2 PRODUCTS2.1 MATERIALS*NOTE: Edit these paragraphs to meet project requirements.*2.1.1 SlateProvide slate conforming to ASTM C 406. Slate shall be Grade A, (ASTM S1), hard, dense rock, punched or drilled for two nails
30、each. Cracked slate shall not be used. Exposed corners shall be full. Broken corners on covered ends which sacrifice nailing strength or the laying of a watertight roof will not be allowed.2.1.1.1 Standard Thickness Roofing SlateSlate shall be smooth texture rough texture 5 to 6 mm 3/16 to 1/4 inch
31、thickness all _ thickness _ and _ intermingled thicknesses. Slate shall be the following sizes: _ by _ graduated lengths and random widths.2.1.1.2 Graduated Roof SlateSlate shall be smooth texture rough texture and shall vary in thickness from _ at eave to _ at ridge; the percentage of each thicknes
32、s to be respectively _. The thicknesses shall be intermingled in the various courses, modulating from the heavier and thicker slates in the lower courses of the roof to the thinner slates at the ridge. Slate shall be in standard random widths graduated in length from _ at eave to _ at ridge, and sha
33、ll be applied with standard75 mm 3 inch lap and exposures.2.1.1.3 Slate ColorsSlate shall be unfading semi-weathering slate. Color shall be in accordance with Section 09 06 90 COLOR SCHEDULE _.2.1.2 Underlayment MembraneFurnish an underlayment membrane on all surfaces to be covered with slate. Membr
34、ane shall consist of asphalt-saturated felt or high strength composite self-adhering membrane.2.1.2.1 Roofing FeltRoofing felt shall be asphalt-saturated rag felt, Type II, No. 30 asphalt felt in accordance with ASTM D 226.SECTION 07 31 26 Page 5Provided by IHSNot for ResaleNo reproduction or networ
35、king permitted without license from IHS-,-,-2.1.2.2 Elastomeric Membrane UnderlaymentMembrane shall be a cold applied composite self-adhering membrane of not less than 0.10 mm 0.004 inch high strength polyethylene film with slip resistant embossing, coated on one side with a thick layer of adhesive-
36、consistency rubberized asphalt, interwound with a disposable silicone coated release sheet. The tensile strength and elongation values shall be not less than 1.7 MPa 250 psi when tested in accordance with ASTM D 412 and pliability shall be unaffected when tested in accordance with ASTM D 146.2.1.2.3
37、 Elastomeric Membrane AccessoriesTwo component urethane, mastic and primer shall be as approved by the membrane manufacturer. Flashing, expansion joint covers, temporary UV protection and corner fillets shall be as recommended by the membrane manufacturer.2.1.3 NailsNails shall be large-headed slate
38、rs solid copper nails of Number 10 or 11 gauge metal. Nails shall be 3d for slates 450 mm 18 inch or less in length; 4d nails shall be used for slates 500 mm 20 inch or longer, and 6d nails shall be used for slates on hips and ridges. Thicker slates require longer and heavier gauge nails. The proper
39、 size shall be determined by adding 25 mm 1 inch to twice the thickness of the slate. Nails shall be of sufficient length to adequately penetrate the roof sheathing. Nails used to retain copper flashing and slate at rake edges, hips, ridges, and eaves prone to wind damage shall be of the ring shank
40、design.2.1.4 FlashingFlashing shall be 0.57 kg 20 ounce, light cold-rolled temper (H00) copper conforming to ASTM B 370. Flashing shall be in accordance with the requirements as specified in Section 07 57 13 FLASHING AND SHEET METAL.2.1.5 Elastic CementElastic cement shall be an approved brand of wa
41、terproof elastic slaters cement colored to match as nearly as possible the general color of the slate.2.1.6 Acid Neutralizing Wash*NOTE: In areas of the country where past burning of fossil fuels has caused acid staining of slate roofs and existing portions of the roof are being reused or are to rem
42、ain in place, application of an acid neutralizing wash is recommended. Edit specification to meet project requirements.*Acid neutralizing wash shall be non-destructive wash formulated to neutralize the effects of acid deposits resulting from the past burning of fossil fuels (particularly coal). The
43、wash shall not change the color, appearance, or life of the slate roof, copper flashing and accessories, underlayment, adhesives or the wall surfaces of the building.SECTION 07 31 26 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2.1.7 Sealant
44、sSealants, where required, shall be in accordance with the slate manufacturers recommendations.2.2 ACCESSORIES FOR SLATE ROOFS2.2.1 Crickets or SaddlesProvide crickets of light rafter construction covered with sheathing, underlayment, and copper sheet metal specified in Section 07 57 13 FLASHING AND
45、 SHEET METAL. If the cricket area is large and exposed to view, it shall be slated the same as other roof areas.2.2.2 Snow Guards*NOTE: Snow guards are necessary accessories for most slate roofs in sections of the country where masses of snow and ice accumulate on the roof that can slide from the roof onto lower roof surfaces and gutters. Snow guards are manufactured in various forms, and each type requires different methods of application. They may be obtained from
