Heads up: There are no amended sections in this chapter.

1. Scope

  1. 1.1 This Protocol covers procedures for testing self-adhering, prefabricated, polymer modified bituminous, and solid thermoplastic sheet roofing materials intended for use as underlayment in Tile Roof Systems to assist in the waterproofing to function in combination with a Prepared Roof Covering. These products may employ granular or particulate surfacing materials on one side. The Granule Adhesion test shall be required for all granular surfaced materials used as a bonding surface for mortar or adhesive set tile systems.
  2. 1.2 The test procedures outlined in this Protocol cover the determination of the Wind Uplift Resistance; the Thickness; the Dimensional Stability; the Tear Resistance; the Breaking Strength; the Elongation; the Low Temperature Flexibility; the Ultraviolet Resistance; the Accelerated Aging Performance; the Cyclic Elongation Performance; the Water Vapor Transmission; the Compound Stability; the Puncture Resistance; the Tile Slip-page Resistance; the Peel Resistance; the Accelerated Weathering Performance of an underlayment material; the Tensile Adhesion properties of the exposed surface of the underlayment; and Granular Adhesion for granular surfaced underlayment.
  3. 1.3 These test methods appear in the following order:

    Section
    Conditioning5
    Thickness6
    Wind Uplift7
    Dimensional Stability8
    Tear Resistance9
    Breaking Strength and Elongation10
    Reserved11
    Low Temperature Flexibility12
    Ultraviolet Resistance13
    Accelerated Aging14
    Cyclic Elongation15
    Water Vapor Transmission16
    Compound Stability17
    Puncture Resistance18
    Tile Slippage Resistance19
    Reserved
    Peel Resistance21
    Granule Adhesion22
    Tensile Adhesion23
    Accelerated Weathering24

2. Referenced Documents

  1. 2.1 ASTM Test Standards:

    D1079Standard Definitions and Terms Relating to Roofing, Waterproofing and Bituminous Materials
    D1623Standard Test Method For Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics
    D1970Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection (Low Temperature Flexibility)
    D2523Testing Load-Strain Properties of Roofing Membranes
    D4073Standard Test Method For Tensile Tear Strength of Bituminous Roofing Membranes
    D5147Sampling and Testing Modified Bituminous Sheet Materials
    E96Water Vapor Transmission of Materials
    E380Excerpts from the Standard Practice for Use of the International System of Units (SI) (the Modernized Metric System)
  2. 2.2 Reserved
  3. 2.3 Reserved
  4. 2.4 The Florida Building Code, Building.
  5. 2.5 Application Standards

    TAS 124Test Procedure for Field Uplift Testing of Existing Membrane Roof Systems
  6. 2.6 Reserved

3. Terminology & Units

  1. 3.1 Definitions—For definitions of terms used in this Protocol, refer to ASTM D1079; Chapters 2 and 15 (High-Velocity Hurricane Zones) of the Florida Building Code, Building. The definitions from the Florida Building Code, Building shall take precedence.
  2. 3.2 Units—For conversion of U.S. customary units to SI units, refer to ASTM E380.

4. Significance and Use

  1. 4.1 The test procedures outlined in this Protocol provide a means of determining whether a self-adhering roofing material, intended for use as an underlayment in a Discontinuous Roof System, for use in the High-Velocity Hurricane Zones, meets the requirements of the Florida Building Code, Building.

5. Conditioning

  1. 5.1 Specimens shall be selected in accordance with ASTM D5147. Unless otherwise specified, condition test specimens for a minimum of four (4) hours at 73.4 ± 3.6°F and 50 ± 5% relative humidity prior to testing. Note separate conditioning requirements for cold bend testing in Section 12.1.

6. Thickness

  1. 6.1 Materials shall be checked at five points across the roll width. Measurements shall be made at two points, each being 6 ± 0.5 inches from each edge, and at three points equally spaced between these two points.
  2. 6.2 Compute the average thickness and the standard deviation of the thicknesses, in mils, based on the total number of point measurements from all of the rolls taken.
  3. 6.3 Report the individual point measurements, average, and standard deviation in mils.
  4. 6.4 Any modified bitumen and bituminous membrane test specimen which exhibits an average thickness less than sixty (60) mils shall be considered as failing the thickness test. For granular surfaced products, thickness measurements shall be at the selvage edge, not at a granular surface.
  5. 6.5 Nonbituminous membranes shall not have a thickness minimum. Performance shall be based on physical property testing.

7. Wind Uplift

  1. 7.1 This test covers the determination of the wind uplift resistance of materials specified in Section 1 of this Protocol in accordance with TAS 124 except as noted below.

    1. 7.1.1 Test Deck Construction

      1. 7.1.1.1 Test is being conducted on materials noted in Section 1 of this Protocol; therefore, any reference to "roof membrane" in TAS 124 shall be regarded as 'underlayment.'
      2. 7.1.1.2 Four (4) 8' × 8' test decks shall be constructed of 40/20 19/32 in. APA Rated Plywood Sheathing attached to wood joists spaced 24 o.c. Each test deck shall consist of four (4) panels of said sheathing, the corners of which shall meet at the center of each test deck, leaving a 1/8 in. gap between panels.
      3. 7.1.1.3 Adhere one (1) layer of underlayment to each test deck.
    2. 7.1.2 Procedure

      1. 7.1.2.1 Test shall be a laboratory test not a field test; therefore, any instruction in TAS 124 which references "building or outdoor conditions" shall be regarded as "laboratory conditions."
      2. 7.1.2.2 Regulate the negative pressure in the chamber. Begin by raising the negative pressure in the chamber to 30 lbf/ft2 and holding this pressure for one (1) minute. Thereafter, raise the negative pressure in increments of 15 lbf/ft2, holding each incremented pressure for one (1) minute, until the negative pressure has been held at 90 lbf/ft2 for one (1) minute.
    3. 7.1.3 Report

      1. 7.1.3.1 Any test specimen which exhibits any significant separation between the membrane and tested substrate shall be considered as failing the wind uplift test.

8. Dimensional Stability

  1. 8.1 Prepare five (5) 2 foot wide × 6 foot long specimens with a 4 inch overlap seam across the center of the 6 foot length. Prepare the specimens: one from each edge of the roll and three from random places in the roll. The length of each specimen should be in the "machine direction" of the roll.
  2. 8.2 The substrate shall be APA 32/16 span rated sheathing of a 15/32 in. thickness that has been reinforced on the back side with two angle irons.
  3. 8.3 Adhere the underlayment specimen on the substrate and install a 11/2 in. × 11/2 in. × 2' wood termination batten to one "free" end of the underlayment using three (3) equally spaced #12 wood screws to secure the batten through the underlayment and the sheathing. Mechanically attach the other "free" end of the underlayment using three (3) equally spaced roofing nails, located two (2) inches from the "free" end, with one nail at one inch from each edge, penetrating the sheathing a minimum of 1/2 inch.
  4. 8.4 Condition each specimen in an oven or under heat lamps maintained at 180 ± 5°F for a minimum of six (6) hours.
  5. 8.5 Report any tears or "tear drop" conditions which arise at fastener penetrations during and/or after conditioning is complete. Report any shrinking or wrinkling which appears to have compromised the lapped area of underlayment.
  6. 8.6 Any test specimen which exhibits conditions noted in Section 8.5 of this Protocol shall be considered as failing the dimensional stability test.
  7. 8.7 Provide before and after photographs of each specimen in the final test report.

9. Tear Resistance

  1. 9.1 This test covers the determination of the tear propagation resistance of materials specified in Section 1 of this Protocol in accordance with ASTM Test Method D4073, except as noted below.

    1. 9.1.1 The prescribed Test Method shall be run in both the machine and the cross-machine direction of the roll material.
    2. 9.1.2 The final test report shall include average tear propagation force values and standard deviations of these value for both the machine and the cross-machine direction of the material.
    3. 9.1.3 Any test specimen which exhibits a tear propagation value less than 20 lbf (88.5 N) in either the machine or cross-machine directions shall be considered as failing the tear strength test.

10. Breaking Strength and Elongation

  1. 10.1 This test covers the determination of the breaking strength and elongation of materials specified in Section 1 of this Protocol in accordance with ASTM Test Method D 2523, except as noted below.

    1. 10.1.1 Sampling

      1. 10.1.1.1 Ten specimens; five in the machine direction and five in the cross-machine direction of the roll, shall be cut to dimensions of 1 in. × 6 in.
    2. 10.1.2 Conditioning

      1. 10.1.2.1 Heat Aging, shall consist of seven (7) days in an air circulating oven at a controlled temperature of 149 ± 5°F.
      2. 10.1.2.2 UV Exposure shall consist of 460 hours of continuous ultraviolet light exposure in accordance with the apparatus and configuration in 13.1.2.1 herein.
    3. 10.1.3 Procedure

      1. 10.1.3.1 Each set of samples, as specified in 10.1.1.1 herein, shall be tested "as received," after heat aging and UV exposure as specified in 10.1.2.1 and 10.1.2.2 herein.
      2. 10.1.3.2 Grip separation rate shall be 20 ± 0.2 inches per minute for all tests conducted.
      3. 10.1.3.3 Temperatures of specimens and test grips during conditioning and testing shall be 73.4 ± 3.6°F.
    4. 10.1.4 Report

      1. 10.1.4.1 Report the grip separation rate used.
      2. 10.1.4.2 Breaking strength shall be reported, in lbf/inch of width, for all test specimens and shall be itemized in grouping of "as received," after heat aging and UV exposure, as specified in 10.1.2.1 and 10.1.2.2 herein. The test specimens shall be itemized in subgroups of machine direction and cross-machine direction. Any test specimen which exhibits a breaking strength value less than those listed in Table 1 shall be considered as failing the breaking strength test.
      3. 10.1.4.3 Elongation shall be reported, in (%), for all test specimens and shall be itemized in groupings of "as received," after heat conditioning, and after UV exposure. These groupings shall be itemized in subgroups of machine direction and cross-machine direction. Any test specimen which exhibits elongation values less than those listed in Table 2 shall be considered as failing the elongation test.

11. Reserved

12. Low Temperature Flexibility

  1. 12.1 This test covers the determination of the low temperature flexibility of materials specified in Section 1 of this Protocol in accordance with ASTM Test Method D1970 except as noted below. Membranes shall be tested at a maximum of -10°F.

    1. 12.1.1 Procedure

      1. 12.1.1.1 Each set of specimens shall be tested "as received" and after conditioning, as specified in ASTM D1970.
    2. 12.1.2 Report

      1. 12.1.2.1 Low temperature flexibility results shall be reported on a pass/fail basis, for all test specimens and shall be itemized in grouping of "as received" and after conditioning. No cracking at -10°F shall be considered as passing the low temperature flexibility test.

13. Ultraviolet Resistance

  1. 13.1 This test covers the determination of the ultraviolet resistance performance of materials specified in Section 1.

    1. 13.1.1 Sampling—Two 18 in. × 48 in. specimens are to be cut.
    2. 13.1.2 Conditioning

      1. 13.1.2.1 Ultraviolet light shall be produced by four 300 watt UV lamps in an enclosure in accordance with Figure 1. Recommended lamps are: Ultra-Vitalux, 300 W, 220-230 V, #E27; Osram 300 W lamps; or equivalent bulbs providing UV characteristics of 5.0 W/m2/nm irradiance at a wavelength of 315 to 400 nm at one meter.
      2. 13.1.2.2 Specimens to be exposed for 460 (±2) continuous hours.
      3. 13.1.2.3 Specimen temperature to be maintained at 135—140°F throughout the test period.
    3. 13.1.3 Report & Conditions of Acceptance

      1. 13.1.3.1 Report any visible peeling, chipping, cracking, flaking, pitting or other damage, under 5× magnification, which resulted from the ultraviolet conditioning. Report the type and location of the damage (if any).
      2. 13.1.3.2 Report the type of UV lamps used to condition the samples.
      3. 13.1.3.3 Any test specimen which exhibits damage as defined in Section 13.1.3.1 of this Protocol shall be considered as failing the ultraviolet resistance test.

14. Accelerated Aging

  1. 14.1 This test covers the determination of the accelerated aging performance of materials specified in Section 1 of this Protocol.
  2. 14.2 Specimen Preparation—Six (6) 12 in. × 12 in. specimens shall be prepared with three (3) in the machine direction and three (3) in the cross-machine direction of the roll. Specimens shall be marked to indicate machine direction.
  3. 14.3 Accelerated Aging—The specimens prepared per Section 14.2 are aged by the following cyclic process. Twenty-five cycles are required, with each cycle consisting of the following:

    1. Oven dry at 120°F (48.9°C) for three hours with all surfaces exposed.
    2. Immerse in water maintained at room temperature for three hours, with all surfaces exposed.
    3. Remove from water and blot dry, then air dry for 18 hours at room temperature with all surfaces exposed.

    Samples shall be in the air dry period over weekends and holidays, which shall be confirmed in the test log. The room temperature shall be maintained at 73 ± 5°F (22.8 ± 2.8°C).

    1. 14.3.1 Conditions of Acceptance—No visible damage to the specimens, such as chipping, cracking or delamination.

      1. 14.3.1.1 Breaking strength and elongation tests of aged specimens shall be conducted in accordance with Section 10 of this Protocol, except as noted below.
      2. 14.3.1.2 Sampling—After the six (6) 12 in. × 12 in. aged specimens have been examined for visible damage, prepare ten (10) 1 in. × 6 in. specimens from the aged material; five in the machine direction and five in the cross-machine direction of the roll. In addition to these ten aged specimens, prepare ten "as received" specimens of the same dimensions; five in the machine direction and five in the cross-machine direction of the roll.
      3. 14.3.1.3 Conditioning—No further conditioning is to be incurred on the aged specimens.
      4. 14.3.1.4 Procedure—Each set of samples, as specified in Section 14.2 herein, shall be tested "as received" and after accelerated aging.
      5. 14.3.1.5 Report

        1. 14.3.1.5.1 Breaking strength shall be reported, in lbf/inch of width, for all test specimens and shall be itemized in grouping of "as received" and after accelerated aging. These specimens shall be itemized in subgroups of machine direction and cross-machine direction. Any aged specimen which exhibits a breaking strength less than the "after heat aging" value listed in Table 1 shall be considered as failing the accelerated aging test.
        2. 14.3.1.5.2 Elongation shall be reported, in (%), for all test specimens and shall be itemized in grouping of 'as received' and after accelerated aging. These specimens shall be itemized in subgroups of machine direction and cross-machine direction. Any aged specimen which exhibits an elongation value less than the applicable value listed in Table 2 shall be considered as failing the accelerated aging test.

15. Cyclic Elongation

  1. 15.1 This test covers the determination of the cyclic elongation performance of materials specified in Section 1 of this Protocol.

    1. 15.1.1 Three specimens are prepared with 15/32-inch-thick (12.7 mm), 3-inch-by-6-inch (76 mm by 152 mm) APA Rated A-C plywood. Each specimen includes two plywood pieces aligned so that the 6-inch (152 mm) edges are parallel and separated by 1/8 inch (3.2 mm). Once piece of underlayment, 5 inches by 5 inches is attached to the plywood pieces across the joint and rolled 3 times back and forth (2-3s per direction) using a 26 lb. (11.8 kg) roller. The specimens are then conditioned at 73 ± 4°F (22.8 ± 2.2°C) for seven days. After conditioning, specimens are placed in a cold box, which is maintained at —20°F (—28.9°C) for 24 hours ± 1 hour. Specimens are then cycled between a 1/8-inch (3.2 mm) and 1/4-inch (6.4 mm) plywood edge separation for 100 cycles while maintaining the temperature at —20°F (—28.9°C). The rate of movement shall be 1/8 inch (3.2 mm) per hour.
    2. 15.1.2 Conditions of Acceptance—Any test specimen which exhibits cracking of material shall be considered as failing the cyclic elongation test.

16. Water Vapor Transmission

  1. 16.1 This test covers the determination of the water vapor transmission of materials specified in Section 1 of this Protocol in accordance with ASTM Test Method E96, procedure B.
  2. 16.2 The water vapor transmission of the membrane shall not be greater than 1.0 g/m2 in 24 hours.

17. Compound Stability

  1. 17.1 This test covers the determination of the high temperature stability of materials specified in Section 1 of this Protocol in accordance with ASTM Test Method D5147, except as noted below.

    1. 17.1.1 Any test specimen which exhibits flowing, dripping or drop formation at a temperature less than 220°F shall be considered as failing the compound stability test.

18. Puncture Resistance

  1. 18.1 This test covers the determination of the puncture resistance of materials specified in Section 1 of this Protocol as noted below.

    1. 18.1.1 Two 12 in. × 25 in. specimens shall be prepared; one ultraviolet light conditioned and one accelerated aging conditioned, as specified in Sections 13 and 14 of this Protocol, respectively.
    2. 18.1.2 The puncture point shall be affixed to any shaft and have a right angle triangular pyramid shape that is 1 inch in height with rounded leading edges of 0.062 ± 0.002 inch radius. The point should be honed to a 0.062 inch radius and the base edges left sharp. The weight of the puncture point and shaft shall be 1.0lb ± 0.1lb.

      1. 18.1.2.1 Attach each specimen to a frame consisting of nominal wood members spaced 24 inches on center.
      2. 18.1.2.2 The test specimens shall have a maximum sag of 1 inch measured from the top of the framing member.
      3. 18.1.2.3 Drop the puncture point from a height of 30 inches above the top of the framing in five different locations.
    3. 18.1.3 Any test specimen which exhibits any sign of puncture shall be considered as failing the puncture test.

19. Tile Slippage Resistance

  1. 19.1 Prepare three (3) 4 foot × 8 foot test frames using minimum 2 inch by 4 inch nominal lumbar spaced at 24 inches on center.
  2. 19.2 Install 15/32 in. APA 32/16 span rated sheathing on the test frames.
  3. 19.3 Adhere the underlayment to the substrate with a side lap and back nailed per the manufacturer's installation instructions. The side lap width and back nailing details shall be included in the final test report.
  4. 19.4 Condition each test deck in an oven or under heat lamps maintained at 165 ± 5°F for a minimum of four (4) hours. Thereafter, the deck shall be cooled for minimum three hours at 75° ± 5°F.
  5. 19.5 After conditioning, position one test deck at a slope of 4 in:12 in.; one at a slope of 5 in:12 in.; and the third at a slope of 6 in:12 in. The 5 in:12 in. test deck may be omitted if requested by the client.
  6. 19.6 Onto each sloped test deck, place one (1) stack of 10 flat concrete tiles and one (1) stack of 10 profiled tiles manufactured with "lugs" on the underside of each tile. Allow the tile stacks to sit on the underlayment surface for a minimum of 36 hours while maintaining a controlled surface temperature of 165° ± 5°F. Temperature to be maintained by a thermocouple mounted on the surface of the underlayment.
  7. 19.7 Report any of the following:

    • Any tile slippage on any portion of the underlayment
    • Any tears in the underlayment
    • Any tears in the underlayment surfacing
    • Any delamination of the underlayment facing from the adhesive layer
  8. 19.8 Any test specimen which exhibits conditions noted in Section 19.7 of this Protocol shall be considered as failing the tile slippage resistance test.
  9. 19.9 Provide before and after photographs of each specimen in the final test report.
  10. 19.10 Alternate stacking configurations shall be permitted to be approved as part of a Product Approval. Details of such stacking configurations shall be included in the final test report.

20. Reserved

21. Peel Adhesion

  1. 21.1 This test covers the determination of the peel adhesion to substrate performance of materials specified in Section 1 of this Protocol in accordance with the applicable provisions of ASTM Test Method D1970 and as noted below.

    1. 21.1.1 Specimen Preparation

      1. 21.1.1.1 The substrate shall be APA 32/16 span rated plywood sheathing of a 15/32 in. thickness.
    2. 21.1.2 Conditioning

      1. 21.1.2.1 One set of samples shall be conditioned at 73.4 ± 3.6°F for four (4) hours; a second and third set shall be conditioned per Sections 13 and 14 of this protocol for accelerated aging and ultraviolet resistance, respectively.
    3. 21.1.3 Report

      1. 21.1.3.1 Peel Adhesion shall be reported, in lbf/foot of width, for all test specimens and shall be itemized in grouping of "conditioned at 73.4°F," "after accelerated aging" and "after ultraviolet conditioning."
      2. 21.1.3.2 Any "conditioned" specimen which exhibits a peel strength less than 6.5 lbf/foot of width shall be considered as failing the peel adhesion test.
      3. 21.1.3.3 Any aged or ultraviolet conditioned specimen which exhibits a peel strength less than 4.9 lbf/foot of width shall be considered as failing the peel adhesion test.

FOR MINERAL SURFACED MATERIAL TO BE USED AS A MORTAR OR ADHESIVE SET TILE UNDERLAYMENT

22. Granule Adhesion

  1. 22.1 This test covers the determination of granule loss of materials specified in Section 1 of this Protocol, which employ a fine or granular surfacing on one side, in accordance with ASTM Test Method D5147, except as noted below.

    1. 22.1.1 Any test specimen which exhibits an average granule loss greater than 0.75 grams shall be considered as failing the granule adhesion test.

FOR UNDERLAYMENTS TO BE USED WITH ADHESIVE SET TILE SYSTEMS

23. Tensile Adhesion of Tile Adhesives

  1. 23.1 This test covers the determination of the tensile adhesion bond between a tile adhesive and the underlayment surface.
  2. 23.2 This test is required to be performed on all adhesives for which approval is sought.
  3. 23.3 Sample Preparation and Testing

    1. 23.3.1 Prepare 20 (5 each) specimens for testing at 0 days (control), 14 days, 60 days and 120 days:

      1. 23.3.1.1 Bond a 2 inch wide by 24 inch long piece of underlayment to a 2 inch wide by 24 inch long piece of 23/32" B-C APA rated plywood. Take care that the method of bonding does not interfere with or otherwise alter the surface of the underlayment to which the tile adhesive is to be applied. Prepare (6) underlayment/plywood strips in this fashion.
      2. 23.3.1.2 Place two prepared specimens with the long edge horizontal in a jig such that there is a max. 3/4 inches between specimens and the specimens are braced to prevent expansion. The exposed surface of the specimens should be facing each other.
      3. 23.3.1.3 Apply foam adhesive in the void between specimens in a manner specified by the adhesive manufacturer's instructions.
      4. 23.3.1.4 Allow the adhesive to cure for min. 2 hours.
      5. 23.3.1.5 Remove the adhered specimens from the jig and trim excess adhesive from all edges.
      6. 23.3.1.6 Cut each adhered specimen into 2 inch by 2 inch squares.
    2. 23.3.2 Condition the 2 inch by 2 inch specimens as follows:

      1. 23.3.2.1 Control specimens shall be conditioned at 73.4 ± 3.6°F and 50% relative humidity for 4 hours.
      2. 23.3.2.2 All remaining specimens shall be conditioned at 180 ± 2°F and 65% relative humidity. Six specimens each shall be conditioned for 14, 60 and 120 days.
    3. 23.3.3 Test all samples in accordance with ASTM D1623. Testing shall be performed after a stabilization at 73.4 ± 3.6°F and 50% relative humidity.
  4. 23.4 The average tensile adhesion of five specimens after 0, 14, 60 and 120 days shall be min. 15 psi. Any set of specimens with an average tensile adhesion below 15 psi will be considered as having failed this test.

24. Accelerated Weathering

  1. 24.1 Underlayments for which an outdoor exposure greater than 30 days is desired must comply with the requirements of this section.

    TABLE 24.1
    Days of Allowable Outdoor ExposureAccelerated Weathering Duration (Hours)
    45250
    60333
    90500
    120666
    150833
    1801,000
  2. 24.2 Underlayments shall be exposed to accelerated weathering in accordance with ASTM D4798, Cycle A-1.

    TABLE 24.2
    Property TestedSection NumberMinimum Requirement (MD & CD)
    Breaking Strength1025 lbf/in
    Elongation10Organic
    Reinforcement
    Fiberglass
    Reinforcement
    Polyester or
    Polypropylene
    Reinforced
    Solid
    Thermoplastic
    Sheeting
    6%3%25%225%
    Low Temperature
    Flexibilty
    12No Cracking
    1. 24.2.1 Exposure Limitations shall be established per Table 24.1.
    2. 24.2.2 At the conclusion of the required accelerated weathering, the weathered underlayment shall be tested per Table 24.2. Any product not achieving the values therein will be considered as having failed the test.
  3. 24.3 Report the results of testing per Table 24.2 and the duration of Accelerated Weathering exposure.

TABLE 1

MINIMUM BREAKING STRENGTH VALUES

SPECIMEN BREAKING STRENGTH
As Received
After Heat Aging
After UV Exposure
(Machine Direction or
Cross-Machine Direction)
25 lbf/inch of width (35 N/cm of width)
25 lbf/inch of width (35 N/cm of width)
25 lbf/inch of width (35 N/cm of width)

TABLE 2

MINIMUM ELONGATION VALUES (%)

SPECIMEN ORGANIC
REINFORCEMENT
FIBERGLASS
REINFORCED
POLYESTER OR
POLYPROPYLENE
REINFORCED
SOLID THERMOPLASTIC
SHEETS
As Received MD 6% MD 3% MD 25% MD 225%
XMD 6% XMD 3% XMD 25% XMD 225%
After Heat Aging 5% 2.5% 21% 191%
After UV Exposure 5% 2.5% 21% 191%
FIGURE 1
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