UL PRODUCT CATEGORY

[Roof-covering Materials] Roofing Systems, TGFU


See General Information for Roof-covering Materials

704.11705.61503.11505.11506.11507.101507.111507.121507.12.21507.131507.141507.151510.12303.1.5.22603.6

GENERAL

This category covers materials intended for roofing systems that provide Class A, B or C coverings on combustible (wood - 3/4 in.-thick sheathing boards or plywood, unless otherwise indicated) and noncombustible (steel, concrete or poured gypsum) decks, unless otherwise indicated in the individual certifications. Minimum 2 in.-thick unfaced structural cement fiber units, formed into slabs or boards and covered under Structural Cement-Fiber Units (CIYT), are suitable alternates as roof decks for all certified roofing systems intended for use over noncombustible decks.

The use of 7/16-in. (minimum) thick nonveneer APA-rated sheathing (oriented strand board panels, structural particleboard panels, composite panels or waferboard panels) is a suitable alternate to 15/32-in. (minimum) thick plywood specified in the Class A, B or C certifications for the individual manufacturers. Certifications are applicable to roofing systems used over insulated decks when so indicated in the individual certifications.

Certified gypsum wallboard, any thickness, may be included in any roofing system without adversely affecting the certification. Insulations may be attached to the deck with fasteners, hot mopping asphalt or certified adhesive.

Certifications are applicable either for new construction, recovering or replacement purposes. (Recovering is the process of covering an existing roofing system with a new roofing system. Replacement is the process of removing an existing roof system and replacing it with a new system.) For recovering situations, certified uninsulated new construction assemblies are not intended for installation over existing certified insulated assemblies unless specifically certified under Maintenance and Repair Systems. See MAINTENANCE AND REPAIR SYSTEMS below for further information.

Certified insulated systems may be installed over existing certified insulated systems when:

1) the new system is certified for use with the existing roof insulation type (glass fiber, perlite, wood fiber, foamed plastic, etc.), and
2) the total thickness of insulation in both systems does not exceed the maximum specified for the new system being applied.

For installation over noncombustible decks, any certified insulated system utilizing minimum 1-in.-thick insulation (glass fiber, polyisocyanurate or perlite) may be used over any existing insulated system regardless of the type if its insulation in both systems does not exceed the maximum specified for the new system being applied. Certification is determined by the new construction system.

The above classifications apply only to coverings composed of certified materials assembled as described in the individual manufacturer certifications; flashings and trimmings being the same as or not less than the equivalent of the roofing systems in each class, or of 16 oz or heavier copper, No. 26 gauge or heavier galvanized steel, or 0.019 in. thick or heavier aluminum.

Roofing systems investigated for impact resistance are so indicated in the individual certifications by the appearance of the word "Impact" and the applicable Class No. (1, 2, 3 or 4) adjacent to the "Incline." These systems are also referenced under Roof-covering Materials, Impact Resistance (TGAM).

See TGAM for a description of the Impact Resistance Certification Program.

This category covers the following roofing systems, which are composed of varying types of components:

1. Asphalt Felt Systems (Organic or Glass Fiber) with Hot Roofing Asphalt
2. Coal Tar Felt Systems (Organic or Glass Fiber) with Hot Roofing Coal Tar Pitch
3. Cold-application Systems (Asphalt Felts or Ply Sheets with Cold Cements and Coatings)
4. Combination Hot and Cold Systems
5. Fluid-applied Coating Systems
6. Maintenance and Repair Systems
7. Single-ply Membrane Systems (Includes Modified Bitumen Membranes)
8. Spray-applied Foam and Coating Systems
9. Photovoltaic (Solar) Modules
10. Other systems

The following describes the composition of each of these system types.

ASPHALT FELT SYSTEMS (ORGANIC OR GLASS FIBER)
WITH HOT ROOFING ASPHALT

Asphalt Organic Felt Systems

These roofing systems are composed of asphalt-saturated organic felts and/or combinations of cap and base sheets (saturated felts which are asphalt coated on one or both sides) applied with hot roofing asphalt as shown below (minima specified). Class A and B systems are surfaced with 400 lb of roofing gravel or crushed stone or 300 lb of crushed slag per sq of finished roof embedded in a flood coat of hot roofing asphalt. The roofing gravel, crushed stone or slag is to be dry, relatively free from dirt and dust, and graded in size from 1/4 to 5/8 in. diameter. Limited to roof decks having inclines not exceeding 3 in. to the horizontal foot.

Class C systems differ from the Class A and B systems in that they are surface finished with a cold-application coating. See the individual certifications for coating designations and incline limitations. Unless otherwise required, granules or sand may be optionally applied to any coating.

The first layer of the systems listed below is generally nailed to combustible decks through metallic disks and hot mopped to noncombustible decks. Succeeding layers are hot mopped in place.

Class A*:

1. Five layers of perforated Type 15 felt.
2. Four layers of Type 15 felt.
3. One layer of Type 30 and two layers of Type 15 felt.
4. One layer of Type 15 felt and two layers of Type 15 or 30 cap or base sheets.
5. Three layers of Type 15 or 30 cap or base sheets.
6. Three layers of Type 15 felt. Limited to noncombustible roof decks.

Class B*:

1. Four layers of perforated Type 15 felt.
2. Three layers of Type 15 felt.
3. Two layers of Type 15 or 30 cap or base sheets.

Class C*:

1. Three layers of Type 15 felt.
2. One layer of Type 30 and one layer of Type 15 felt.
3. Two layers of Type 15 or 30 cap or base sheets.
4. Two layers of Type 15 felt and one layer of Type 15 or 30 cap or base sheets.

* Type 20 products can be substituted for the Type 15 products specified in these systems.

The above roofing systems are suitable for installation over minimum 3/4-in.-thick certified perlite, polyisocyanurate or glass fiberboard roof insulation. Certified wood fiberboard insulation is suitable only for systems installed over noncombustible decks.

Asphalt Glass Fiber Systems

These roofing systems are composed of asphalt-coated glass fiber felts and cap sheets applied with hot roofing asphalt as indicated below (minima specified). The first layer of the systems described below is generally nailed to combustible decks through metallic disks and hot mopped to noncombustible decks. Succeeding layers are hot mopped in place.

Class A:

1. Maximum incline - 3 in.

Three layers of Type G1 or G2 asphalt glass fiber felts. Surfaced with 400 lb of roofing gravel or crushed stone or 300 lb of crushed slag in a flood coat of hot roofing asphalt at a minimum 60 lb per sq.

2. Limited to noncombustible decks at maximum inclines of 1 in.

Three layers of Type G1 or G2 asphalt glass fiber felts applied with hot roofing asphalt; surfaced with one layer of Type G3 mineral surfaced cap sheet.

Class B:

1. Maximum incline - 3/4 in.

Two layers of Type G1 or G2 asphalt glass fiber felts applied with hot roofing asphalt and surfaced with one layer of Type G3 cap sheet.

See the individual certifications for roofing systems not covered by the above.

The above roofing systems are suitable for installation over minimum 3/4 in. certified glass fiber, perlite or polyisocyanurate board roof insulation. Certified wood fiberboard roof insulation is suitable only for systems installed over noncombustible decks.

COAL TAR FELT SYSTEMS (ORGANIC OR GLASS FIBER)
WITH HOT ROOFING COAL TAR PITCH

These roofing systems are composed of coal tar saturated organic or glass fiber felts applied with hot roofing coal tar pitch as shown below (minima specified). These systems are surfaced with 400 lb of roofing gravel or crushed stone or 300 lb of crushed slag per sq of finished roof embedded in a flood coat of hot roofing coal tar pitch. The roofing gravel, crushed stone or slag is to be dry, relatively free of dirt and dust, and graded in size from 1/4 to 5/8 in. diameter. Limited to roof decks having inclines not exceeding 3 in.

The first layer of the system described below is generally nailed to combustible decks through metallic disks and hot mopped to noncombustible decks. Succeeding layers are hot mopped in place.

Class A:

1. Four layers of Type 15 organic felt, Type G1 or G2 glass fiber felt.
2. Three layers of Type 15 organic felt, Type G1 or G2 glass fiber felt. Limited to noncombustible decks.

Class B:

1. Three layers of Type 15 organic felt, Type G1 or G2 glass fiber felt.

See the individual certifications for roofing systems not covered by the above.

The above roofing systems are suitable for installation over minimum 3/4-in.-thick certified perlite, polyisocyanurate or glass fiberboard roof insulation. Certified wood fiber insulation is suitable only for systems applied over noncombustible decks.

ASPHALT FELT SYSTEMS (ORGANIC OR GLASS FIBER) WITH
HOT ROOFING ASPHALT UTILIZING DOUBLE FLOOD COAT
AND DOUBLE GRAVEL POUR SURFACING

Asphalt Organic Felt Systems

These roofing systems are composed of asphalt-saturated organic felts and/or combinations of cap and base sheets (saturated felts which are asphalt coated on one or both sides) applied with hot roofing asphalt as shown below (minimum specified). Systems are surfaced with two applications of 400 lb/sq of roofing gravel or crushed stone or 300 lb/sq of crushed slag per square of finished roof embedded in two separate flood coats of hot roofing asphalt. After each application of gravel, crushed stone or slag, all loose material is removed. The roofing gravel, crushed stone or slag is to be dry, relatively free from dirt and dust, and graded in size from 1/4 to 5/8 in. diameter. Limited to 15/32 in. (minimum) thick plywood roof decks having inclines not exceeding 1 in. to the horizontal foot.

The first layer of the systems indicated below is generally nailed through the insulation to combustible decks through metallic disks and hot mopped to noncombustible decks. Succeeding layers are hot mopped in place.

One-inch (minimum) thick wood fiberboard, 3/4-in. (minimum) thick perlite or 15/16-in. (minimum) thick glass fiber insulation is required under the systems below when installed on a combustible deck. The joints in the insulation are to be offset 6 in. with the joints in the deck. Any certified insulation, any thickness, may be used optionally in systems installed over noncombustible decks.

Class A*:

1. Five layers of perforated Type 15 felt.
2. Four layers of Type 15 felt.
3. One layer of Type 30 and two layers of Type 15 felt.
4. One layer of Type 15 felt and two layers of Type 15 or 30 cap or base sheets.
5. Three layers of Type 15 or 30 cap or base sheets.
6. Three layers of Type 15 felt. Limited to noncombustible roof decks.

Class B*:

1. Four layers of perforated Type 15 felt.
2. Three layers of Type 15 felt.
3. Two layers of Type 15 or 30 cap or base sheets.

* Type 20 products can be substituted for the Type 15 products specified in these systems.

Asphalt Glass Fiber Systems

These roofing systems are composed of asphalt-coated glass fiber felts applied with hot roofing asphalt as indicated below (minima specified). The first layer of the systems described below is generally nailed through the insulation to combustible decks through metallic disks and hot mopped to noncombustible decks. Succeeding layers are hot mopped in place. Limited to 15/32-in. (minimum) thick plywood roof decks.

One-inch (minimum) thick wood fiberboard, 3/4-in. (minimum) thick perlite or 15/16-in. (minimum) thick glass fiber insulation is required under the systems below when installed on a combustible deck. The joints in the insulation are to be offset 6 in. with the joints in the deck. Any certified insulation, any thickness, may be used optionally in systems installed over noncombustible decks.

Class A:

1. Maximum incline - 1 in.

Three layers of Type G1 or G2 asphalt glass fiber felts. Surfaced with two applications of 400 lb/sq of roofing gravel or crushed stone or 300 lb/sq of crushed slag per square of finished roof embedded in two separate flood coats of hot roofing asphalt. After each application of gravel, crushed stone or slag, all loose material is removed. The roofing gravel, crushed stone or slag is to be dry, relatively free from dirt and dust, and graded in size from 1/4 to 5/8 in. diameter.

COAL TAR FELT SYSTEMS (ORGANIC OR GLASS FIBER) WITH
HOT ROOFING COAL TAR PITCH UTILIZING DOUBLE FLOOD COAT
AND DOUBLE GRAVEL POUR SURFACING

These roofing systems are composed of coal tar saturated organic or glass fiber felts applied with hot roofing coal tar pitch as shown below (minima specified). These systems are surfaced with two applications of 400 lb/sq of roofing gravel or crushed stone or 300 lb/sq of crushed slag per square of finished roof embedded in two separate flood coats of hot roofing asphalt. After each application of gravel, crushed stone or slag, all loose material is removed. The roofing gravel, crushed stone or slag is to be dry, relatively free from dirt and dust, and graded in size from 1/4 to 5/8 in. diameter. Limited to 15/32-in. (minimum) thick plywood roof decks having inclines not exceeding 1 in. to the horizontal foot.

The first layer of the systems indicated below is generally nailed through the insulation to combustible decks through metallic disks and hot mopped to noncombustible decks. Succeeding layers are hot mopped in place.

One-inch (minimum) thick wood fiberboard, 3/4-in. (minimum) thick perlite or 15/16-in. (minimum) thick glass fiber insulation is required under the systems below when installed on a combustible deck. The joints in the insulation are offset 6 in. with joints in the deck. Any certified insulation, any thickness, may be used optionally in systems installed over noncombustible decks.

Class A:

1. Four layers of Type 15 organic felt, Type G1 or G2 glass fiber felt.
2. Three layers of Type 15 organic felt, Type G1 or G2 glass fiber felt. Limited to noncombustible decks.

Class B:

1. Three layers of Type 15 organic felt, Type G1 or G2 glass fiber felt.

COLD-APPLICATION SYSTEMS
(ASPHALT FELTS OR PLY SHEETS WITH COLD CEMENTS AND COATINGS)

These roofing systems are composed of asphalt-saturated organic felts or asphalt-coated glass fiber felts or ply sheets applied with cold-application cement and surfaced with a cold-application coating. See the individual certifications for designations and application rates for cements and coatings. Unless otherwise required, granules or sand may be optionally applied to any coating.

COMBINATION HOT AND COLD SYSTEMS

These roofing systems are composed of asphalt-saturated organic felts or asphalt-coated glass fiber felts applied with hot roofing asphalt and surfaced with cold-application coatings. Some systems are surfaced with mineral surfacings, such as sand or No. 11 roofing granules, which are embedded in the coating. Unless otherwise required, granules or sand may be optionally applied to any coating. See the individual certifications for designations and application rates for coatings and surfacing materials.

FLUID-APPLIED COATING SYSTEMS

These roofing systems are composed of a number of layers or coats of plastic roof coatings. Adequate drying time is allowed between successive layers or coats to form a protective membrane. Some systems may utilize various types of reinforcing filaments embedded in a coating layer while wet. Also, some systems may utilize surfacing materials. See the individual certifications for designations and application rates for coatings and surfacing materials.

MAINTENANCE AND REPAIR SYSTEMS

These roofing systems are composed of various types of roofing applications which are specifically limited for installation (recover) over existing roofing systems as specified. These systems may not meet certification requirements without being used over existing systems. Recovering may also be accomplished with certified new construction roofing systems where compatibility has been determined by test, by empirical data or by known performance properties of similar materials to the test methods. The following guidelines are provided to assist Authorities Having Jurisdiction in determining the suitability of a new construction roofing system as a recover system.

Noncombustible Deck Construction:

1. Insulated roof systems may be utilized over any type of existing roof system and maintain its new construction rating when the roof deck is noncombustible.
2. Insulated multiple-layered hot mopped, cold application or modified bitumen membrane new construction systems with a base ply of Type G1 or Type G2 may be used over any existing roof system and maintain its new construction rating when the roof deck is noncombustible. The insulation may be omitted from the recover system.
3. Uninsulated multiple-layered hot mopped, cold application or modified bitumen membrane new construction systems with a base ply of Type G1 or Type G2 may be used over any existing uninsulated roof system and maintain its new construction rating when the roof deck is noncombustible.
4. Spray applied foam systems with minimum 1-1/2-in.-thick foam may be used over any existing roof system and maintain its new construction rating when the roof deck is noncombustible.

Combustible Deck Construction:

1. Insulated roof systems certified for use over combustible deck can be used over any type of existing roof system and maintain its new construction rating.
2. Insulated roof systems certified for use over noncombustible deck may be used over any type of Class A, B or C existing roof systems. The resultant Class will be the lesser rating of the existing system or the new construction (recover) system.
3. Uninsulated multiple-layered hot mopped, cold application or modified bitumen membrane new construction systems with a base ply of Type G1 or Type G2 may be used over any existing uninsulated roof system and maintain its new construction rating.
4. Spray applied foam systems with minimum 1-1/2-in.-thick foam certified for use over noncombustible deck may be used over any type of Class A, B or C existing roof system. The resultant Class will be the lesser rating of the existing system or the new construction (recover) system.

SINGLE-PLY MEMBRANE SYSTEMS
(INCLUDES MODIFIED BITUMEN MEMBRANES)

These roofing systems are composed of various types of membranes (such as EPDM, PVC, CSPE and modified bitumen) which are either ballasted, fully adhered or mechanically attached. Certified insulation may be utilized, as well as various coatings, splicing adhesives, lap sealants and caulking materials. See the individual certifications for designations of products and application rates for various components. Unless otherwise required, granules or sand may be optionally applied to any coating.

SPRAY-APPLIED FOAM AND COATING SYSTEMS

These roofing systems are composed of a foam, formed by the simultaneous spraying of two liquid components to a nominal thickness, covered with a cold-application coating system to form a protective covering. Surfacing materials, such as sand or No. 11 roofing granules, may be embedded in the coating while wet. See the individual certifications for designation of products, foam thickness and application rates for the coatings involved. Unless otherwise required, granules or sand may be optionally applied to any coating.

PHOTOVOLTAIC (SOLAR) MODULES

Photovoltaic (solar) modules are composed of flat-plate photovoltaic module/panels when installed in accordance with the manufacturer's installation instructions. These coverings have also been investigated to ANSI/UL 1703, "Flat-Plate Photovoltaic Modules and Panels"; see Photovoltaic Modules and Panels (QIGU).

OTHER SYSTEMS

These systems cover products such as building units used in specific Class A, B or C roofing systems. Building units may consist of composite insulation boards, metal-faced insulation panels or insulating material, faced on top and bottom with metal or plastic reinforced glass fiber skins which are intended for direct application to rafters or purlins. The structural aspects of these materials have not been investigated. See the individual certifications for the specific system details.

ABBREVIATIONS AND TERMS USED IN CERTIFIED
ROOFING SYSTEMS DESCRIBED FOR
INDIVIDUAL MANUFACTURERS

Decks - Noncombustible = NC; combustible (includes noncombustible) = C. (Suffix number indicates the minimum thickness of plywood).

Maximum incline in inches to the horizontal foot = Incline, "x" (in.).

Inclines sufficient to permit drainage = Incline - no limitation.

Per 100 square feet = Per sq.

Application rates for mineral surfacings and liquid components shall be a number indicating either lbs or gals per square.

Minimum surfacings in a flood coat of hot roofing asphalt or coal tar pitch:

  • 400 lbs gravel per square = gravel
  • 400 lbs crushed stone per square = crushed stone
  • 300 lbs slag per square = slag

Application rates differing from the above are indicated in the individual certifications.

Any other surfacing materials used are described on individual certifications with type and application rates specified.

Where indicated in the individual certifications, products covered under this category have also been evaluated by ICC Evaluation Service (ICC-ES).

PRODUCT IDENTITY

One of the following product identities appears on the product:

    Base/Ply Sheet for Roofing Systems

    Building Units for Roofing Systems

    Cements and Coatings for Roofing Systems

    Flashing Material for Roofing Systems

    Foamed Plastic for Roofing Systems

    Foamed Plastic Ingredient for Roofing Systems

    Hold-down Device for Roofing Systems

    Insulation Adhesive for Roofing Systems

    Insulation Joint Tape for Roofing Systems

    Membrane for Roofing Systems

    Membrane Splicing Tape for Roofing Systems

    Mineral and Fiber Board for Roofing Systems

    Slip Sheet for Roofing Systems

    Tiles for Roofing Systems

    Type 15 Saturated Felt, Cap or Base/Ply Sheet for Roofing Systems

    Type 30 Saturated Felt, Cap or Base/Ply Sheet for Roofing Systems

    Type G1 Coated Base/Ply Sheet for Roofing Systems

    Type G2 Coated Cap or Base/Ply Sheet for Roofing Systems

    Type G3 Mineral-surfaced Base/Cap Sheet for Roofing Systems

ADDITIONAL INFORMATION

For additional information, see Roof-covering Materials (TEVT) and Roofing Materials and Systems (AARM).

REQUIREMENTS

The basic standard used to investigate products in this category is ANSI/UL 790, "Tests for Fire Resistance of Roof Covering Materials." Some of the products specified in these systems are covered in UL 55A, "Materials for Built-Up Roof Coverings."

UL MARK

Two methods of labeling are provided for this material: (1) Each bundle, package or container bears the Certification Mark, and (2) a Certificate is issued to the interested parties. This Certificate is prepared for each construction site that the manufacturer supplies. The use of the Certificate is optional when each bundle, package or container bears the Certification Mark but, in all cases, is restricted to material shipped directly from the manufacturer to a construction site.

The Certification Mark of UL on the bundle, package or container is the only method provided by UL to identify products manufactured under its Certification and Follow-Up Service. The Certification Mark for these products includes the UL symbol, the words "CERTIFIED" and "SAFETY," the geographic identifier(s), and a file number.

Additional Certification Markings

Products covered under this category are additionally marked with the following information:

AS TO EXTERNAL FIRE EXPOSURE
The following statement may be included where appropriate:

ALSO CERTIFIED AS TO IMPACT RESISTANCE
SEE UL ONLINE CERTIFICATIONS DIRECTORY

Alternate UL Mark

Two methods of labeling are provided for this material: (1) Each bundle, package or container bears the Classification Mark, (2) a Certificate is issued to the interested parties. This Certificate is prepared for each construction site that the manufacturer supplies. The use of the Certificate is optional when each bundle, package or container bears the Classification Mark but, in all cases, is restricted to material shipped directly from the manufacturer to a construction site.

The Classification Mark of UL on the bundle, package or container is the only method provided by UL to identify products manufactured under its Classification and Follow-Up Service. The Classification Mark for these products includes the UL symbol, the word "CLASSIFIED" above the UL symbol (as illustrated in the Introduction of this Directory), and the following additional information:

+ FOR ROOFING SYSTEMS
AS TO EXTERNAL FIRE EXPOSURE
Control No.

+ One of the following designations:

1. CEMENTS AND COATINGS
2. TYPE 15 SATURATED FELT, CAP OR BASE/PLY SHEET
3. TYPE 30 SATURATED FELT, CAP OR BASE/PLY SHEET
4. TYPE G1 COATED BASE/PLY SHEET
5. TYPE G2 COATED CAP OR BASE/PLY SHEET
6. TYPE G3 (optional COATED) MINERAL SURFACED BASE/CAP SHEET
7. MINERAL AND FIBER BOARD
8. FOAMED PLASTIC
9. TILES
10. BUILDING UNITS
11. MEMBRANE
12. FLASHING MATERIAL
13. FOAMED PLASTIC INGREDIENT
14. BASE/PLY SHEET
15. SLIP SHEET
16. HOLD DOWN DEVICE
17. MEMBRANE SPLICING TAPE
18. INSULATION JOINT TAPE
19. INSULATION ADHESIVE

As appropriate, the statement ALSO CLASSIFIED AS TO IMPACT RESISTANCE (SEE ROOFING MATERIALS AND SYSTEMS DIRECTORY) may also be included.

* * * * * * * * * * * * * * * * * * * * * * * * *

UL, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. UL shall not incur any obligation or liability for any loss, expense or damages, including incidental or consequential damages, arising out of or in connection with the use, interpretation of, or reliance upon this Guide Information.

Base/Ply Sheets, Roofing SystemBuilding Units, Roofing SystemFlashing Material, Roofing SystemFoamed Plastic, Roofing SystemFoamed Plastic Ingredients, Roofing SystemHold-down Devices, Roofing SystemInsulation Adhesive, Roofing SystemInsulation Joint Tape, Roofing SystemMembrane, Roofing SystemMembrane Splicing Tape, Roofing SystemMineral and Fiber Board, Roofing SystemSlip Sheets, Roofing SystemTiles, Roofing SystemType 15 Saturated Felt, Cap or Base/Ply Sheets, Roofing SystemType 30 Saturated Felt, Cap or Base/Ply Sheets, Roofing SystemType G1 Coated Base/Ply Sheets, Roofing SystemType G2 Coated Cap or Base/Ply Sheets, Roofing SystemType G3 Mineral-surfaced Base/Cap Sheets, Roofing System
Last Updated on 2013-05-16
TGFU.GuideInfo TGFU Active 20130516 20100303

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