1、Designation: D 3805/D 3805M 97 (Reapproved 2009)Standard Guide forApplication of Aluminum-Pigmented Asphalt Roof Coatings1This standard is issued under the fixed designation D 3805/D 3805M; the number immediately following the designation indicates theyear of original adoption or, in the case of rev
2、ision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide covers the application methods for Specifi-cation D 2824 Aluminum-Pigmented Asphalt Roof
3、 Coatings,Non-Fibered (Type I), Asbestos Fibered (Type II), and Fiberedwithout Asbestos (Type III), for application on asphalt built-uproof membranes, modified bitumen roof membranes, bitumi-nous base flashings, concrete surfaces, metal surfaces, emul-sion coatings, and solvent-based coatings. This
4、guide does notapply to the selection of a specific aluminum-pigmentedasphalt roof coating type for use on specific projects.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore,
5、eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to e
6、stablish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Specific precau-tionary statements are given in Section 4.2. Referenced Documents2.1 ASTM Standards:2D 2824 Specification for Aluminum-Pigmented AsphaltRoof Coatings, Nonfibered
7、, Asbestos Fibered, and Fiberedwithout AsbestosD 4263 Test Method for Indicating Moisture in Concrete bythe Plastic Sheet Method2.2 Other Documents:Asphalt Roofing Manufacturers Association/Roof CoatingsManufacturers Association, Guidelines for Evaluatingand Preparing Modified Bitumen Roofing for th
8、e Appli-cation of Surface Coatings33. Significance and Use3.1 Asphalt-based, solvent-type, fibered or nonfibered,aluminum-pigmented roof coatings are used as a protectivecoating for solar reflection to prolong the life of roofingmaterials or where decorative qualities are desired.3.2 Suitable applic
9、ation of aluminum-pigmented asphaltroof coatings is an important factor in achieving a successfullong-term coating. Suitable application is, in part, dependentupon appropriate specifications to guide the work. This guidecan be useful in facilitating development of an appropriatespecification for sur
10、face preparation and application of the roofcoating.3.3 Designers/specifiers of coatings may use this guide inpreparing the application portion of their specification. Con-tractors working directly for the building owner, may also usethis guide.3.4 This guide is not all-inclusive. Manufacturers appl
11、ica-tion instructions should be consulted and geographical “areapractices” considered. Consult membrane manufacturer andcoating manufacturer for acceptability of procedures andproducts.4. Storage4.1 The container should be tightly sealed to prevent solventevaporation and to keep out moisture. The co
12、atings should notbe stored at temperatures above 50C 120F. (WarningWhen re-sealing a container, exercise caution to avoid trappingor incorporating water into the container. Water can react withaluminum pigment producing hydrogen gas, a potential explo-sion hazard.)5. Equipment for Application of Coa
13、ting5.1 BrushA three-knot or four-knot roofers brush orother suitable brush.5.2 RollerA medium nap roller cover, suitable for usewith asphalt-based, solvent-type coatings.5.3 SprayEquipment capable of spraying coating in acontrolled manner to achieve desired application rate.1This guide is under the
14、 jurisdiction of ASTM Committee D08 on Roofing andWaterproofing and is the direct responsibility of Subcommittee D08.05 on Solvent-Bearing Bituminous Compounds for Roofing and Waterproofing.Current edition approved July 1, 2009. Published July 2009. Originally approvedin 1979. Last previous edition
15、approved in 2003 as D 3805 97(2003)1.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Roof Coa
16、tings Manufacturers Association (RCMA), CenterPark, Suite 404, 4041 Powder Mill Road, Calverton, MD 20705.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Mixing of Coating6.1 The aluminum pigment and filler settle out duringstorag
17、e. Thorough mixing of coating is necessary to redispersethese components prior to use. Mechanically mix the coatinguntil homogeneous. Periodic mixing of the coating duringapplication may be needed. Coating should not be thinned orheated.7. Weather Considerations7.1 Coating applications should not pr
18、oceed during periodsof inclement weather. Do not begin application when precipi-tation is anticipated within 24 h after application.7.2 Apply materials when ambient temperatures are 10C50F and warmer, but not in excess of 40C 104F.8. Surface Considerations8.1 Coatings should be applied to sound surf
19、aces that aredry and clean to promote adhesion. Debris, dirt, grease, oil, andother materials that could impede coating adhesion shall beremoved. It is recommended that coatings be applied as soon aspractical after surface preparation.8.2 Priming is not normally required and should only beused if re
20、commended by the coating or membrane manufac-turer. Priming is not to be considered a substitute for properpreparation or cleaning of the surface.8.3 When the coatings are installed on slopes less than 1 %18 in./ft, performance problems can occur. Standing watermay dull the aluminums luster and may
21、cause adhesion failurebetween the coating and substrate.8.4 Application on steep slopes, may result in some runningof the coating. Consideration should be given to installing thedesired coating coverage in multiple coats at lower applicationrates for the individual coats on steep-slope surfaces.8.5
22、When coatings are to be applied over a bituminoussurface, solvent-based coating or metal, it is recommended thatthe surface be allowed to weather prior to the application of thecoating. The extent of weathering depends on the local ambientweather conditions and the type of surface to be coated.Suffi
23、cient weathering should occur so that asphalt or coatedsurfaces achieve a relative set and are not prone to excessivesoftening or flowing. Applications to newly coated surfacesmay result in bleed-through, stress cracking, or possiblyalligatoring. The length of time necessary for a surface toweather
24、before application of the coating shall be agreed uponby the parties involved (for example, building owner, consult-ant, contractor, manufacturer). The length of time for weath-ering shall be stated in design specifications that reference thisapplication guide.8.6 The previous versions of this guide
25、 required that thesurface have at least the equivalent of one complete summer ofweathering. This guide, although conservative, was generallyfound to be sufficient to avoid cracks and splits in thealuminum roof coating due to substrate movement. In theabsence of any field history, this guide can be f
26、ollowed withreasonable assurance of success.9. Surface Preparation9.1 GeneralDebris, dust accumulations, and other loosematerials should be removed using brooms, air blowers, orvacuum equipment. Heavily soiled areas may be washed usingtrisodium phosphate with water and scrubbed with a broom orpower
27、washed. Rinse thoroughly with plenty of fresh water toremove cleaning solutions. Allow water to evaporate prior tostart of application of coating. Remove materials that couldimpede coating adhesion.9.2 Concrete SurfacesThe concrete must be cured and dryprior to application. Test Method D 4263 is an
28、example of atest that can be conducted to assess moisture contained in theconcrete.9.3 Metal SurfacesClean areas of rust and prime thecleaned area with a suitable primer. Exposed fasteners must besecurely tightened or replaced.9.4 Modified-Bitumen MembranesRefer to Asphalt Roof-ing Manufacturers Ass
29、ociation and the Roof Coatings Manu-facturersAssociation, Guidelines for Evaluating and PreparingModified Bitumen Roofing for the Application of SurfaceCoatings for industry guidelines.10. Coating Application Methods10.1 Consult the coating manufacturer and membrane/substrate manufacturer for specif
30、ic guidelines regarding appli-cation methods, equipment, rate of application, and so forth.Unless otherwise recommended by the manufacturer(s), followthese procedures:10.2 For the lower viscosity nonfibered coating (Type I), therate of application can be in the range of 0.2 to 0.4 L/m212 to1 gal/100
31、 ft2.10.3 For the higher viscosity fibered coatings (Type II orType III), the rate of application for asphalt membranes can be0.4 to 1.4 L/m21 to 312 gal/100 ft2. The rate of applicationfor metal surfaces should be 0.2 to 0.4 L/m212 to 1 gal/100ft2.10.4 Multiple coat applications may be used to achi
32、evemore even coverage and to improve the aesthetic appearance.The rate of application should be maintained for each indi-vidual coat in a multi-coat application. Curing time betweencoats shall be such that in-place coating is not damaged by thefoot traffic necessary to apply the next coat.10.5 For b
33、rush and roller applications, for aesthetic consid-erations only, finish strokes should be made in relatively thesame direction taking into consideration directional changesaround penetrations, protrusions, and along perimeters. Whenmultiple coat applications are used, successive applications canbe
34、applied perpendicular to the previous coat to achieve moreeven coverage and to improve aesthetic appearance.11. Curing Time and Foot Traffic11.1 Curing time is dependent on ambient weather condi-tions during the curing cycle. Under warm, sunny conditions,the coating may dry to the touch in 2 to 4 h.
35、11.2 Avoid walking on the coating until it can take traffic sothat it is not damaged.12. Keywords12.1 aluminum-pigmented; application; coating; roofcoatingD 3805/D 3805M 97 (2009)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item m
36、entionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committ
37、ee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meet
38、ing of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, P
39、O Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 3805/D 3805M 97 (2009)3
