ASTM D2829/D2829M-07(2019)e1

Standard Practice for Sampling and Analysis of Existing Built-Up Roof Systems

SIGNIFICANCE AND USE
5.1 This practice is for the sampling and analysis of existing built-up roof systems. For roofs under construction, use Practice D3617/D3617M.
SCOPE
1.1 This practice is a guide for removing test specimens from existing built-up roofing systems in the field and for determining the approximate quantities of the components of that specimen (Note 1). Components determined may be:  
1.1.1 Insulation components when they are part of the roof membrane system,  
1.1.2 Plies of roofing felt,  
1.1.3 Interply layers of bituminous material,  
1.1.4 Top coating, and  
1.1.5 Surfacing.  
Note 1: This procedure is for the investigation of existing roofs and is not intended for new construction inspection.  
1.2 This practice is applicable to both 914-mm [36-in.] and 1000-mm [39 3/8-in.] wide felt rolls.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precautionary information, see 6.3.2.1.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 31-Dec-2018
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.20 - Roofing Membrane Systems

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation: D2829/D2829M − 07 (Reapproved 2019)
Standard Practice for
Sampling and Analysis of Existing Built-Up Roof Systems
This standard is issued under the fixed designation D2829/D2829M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—Units information was editorially revised in January 2019.
1. Scope 2. Referenced Documents
1.1 This practice is a guide for removing test specimens
2.1 ASTM Standards:
from existing built-up roofing systems in the field and for
D226/D226M Specification for Asphalt-Saturated Organic
determining the approximate quantities of the components of
Felt Used in Roofing and Waterproofing
that specimen (Note 1). Components determined may be:
D227/D227M Specification for Coal-Tar-Saturated Organic
1.1.1 Insulation components when they are part of the roof
Felt Used in Roofing and Waterproofing
membrane system,
D249 Specification for Asphalt Roll Roofing (Organic Felt)
1.1.2 Plies of roofing felt,
Surfaced with Mineral Granules (Withdrawn 2002)
1.1.3 Interply layers of bituminous material,
D250 Standard Specification for Asphalt-Saturated Asbestos
1.1.4 Top coating, and Felt Used in Roofing and Waterproofing (Withdrawn
1.1.5 Surfacing. 1991)
D371 Specification for Asphalt Roll Roofing (Organic Felt)
NOTE 1—This procedure is for the investigation of existing roofs and is
Surfaced with Mineral Granules; Wide Selvage (With-
not intended for new construction inspection.
drawn 2002)
1.2 This practice is applicable to both 914-mm [36-in.] and
D1079 Terminology Relating to Roofing and Waterproofing
1000-mm [39 ⁄8-in.] wide felt rolls.
D2178/D2178M Specification for Asphalt Glass Felt Used in
1.3 The values stated in either SI units or inch-pound units
Roofing and Waterproofing
are to be regarded separately as standard. The values stated in
D2626/D2626M Specification for Asphalt-Saturated and
each system are not necessarily exact equivalents; therefore, to
Coated Organic Felt Base Sheet Used in Roofing
ensure conformance with the standard, each system shall be
D3158 Specification for Asphalt Saturated and Coated Or-
used independently of the other, and values from the two
ganic Felt Used in Roofing (Withdrawn 1983)
systems shall not be combined.
D3617/D3617M Practice for Sampling and Analysis of
Built-Up Roof Systems During Application
1.4 This standard does not purport to address all of the
D3672 Standard Specification for Venting Asphalt-Saturated
safety concerns, if any, associated with its use. It is the
and Coated Inorganic Felt Base Sheet Used in Roofing
responsibility of the user this standard to establish appropriate
(Withdrawn 1990)
safety, health, and environmental practices and determine the
D3909/D3909M Specification for Asphalt Roll Roofing
applicability of regulatory limitations prior to use. For specific
precautionary information, see 6.3.2.1. (Glass Felt) Surfaced With Mineral Granules
D4601/D4601M Specification for Asphalt-Coated Glass Fi-
1.5 This international standard was developed in accor-
ber Base Sheet Used in Roofing
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the D4897/D4897M Specification for Asphalt-Coated Glass-
Development of International Standards, Guides and Recom- Fiber Venting Base Sheet Used in Roofing
mendations issued by the World Trade Organization Technical D4990 Specification for Coal Tar Glass Felt Used in Roofing
Barriers to Trade (TBT) Committee. and Waterproofing
1 2
This practice is under the jurisdiction of ASTM Committee D08 on Roofing and For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Waterproofing and is the direct responsibility of Subcommittee D08.20 on Roofing contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Membrane Systems. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Jan. 1, 2019. Published January 2019. Originally the ASTM website.
approved in 1969. Last previous edition approved in 2013 as D2829 – 07 (2013). The last approved version of this historical standard is referenced on
DOI: 10.1520/D2829_D2829M-07R19E01. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
D2829/D2829M − 07 (2019)
3. Terminology the laboratory for analysis after the number of fasteners in the
larger area is recorded.
3.1 Definitions—For definitions of terms used in this
4.2.1.2 Carefully broom off the loose aggregate, and spud
practice, refer to Terminology D1079.
off the adhered aggregate and flood coating at the perimeter of
4. Securing of Specimens in the Field
the sample. (The application of dry ice at the areas to be
spudded will ease the removal of the top coating during hot
4.1 Do not disturb any surfacing in the area from which a
weather. A large propane torch can also be used as an alternate
specimen is to be taken. Cut each specimen at least 300 by 300
to the dry ice method, to melt the top coating so that it can be
mm [12 by 12 in.] and use the total specimen taken in the field
for laboratory analysis. easily removed with a scraper and facilitate cutting.) Record
the length and width of the sample. If the quantities of
4.2 The recommended practice is to use a cutting template
unadhered surfacing or total surfacing are desired, collect and
(Fig. 1) consisting of a 300 by 300-mm [12 by 12-in.] metal
package the unadhered surfacing from the sample area.
box with an open bottom. Place the box over the roof area that
4.2.1.3 Cut through the roofing membrane with a razor knife
is to be removed, and while the template is held firmly in
or sharp power cutting tool, taking care not to damage the edge
position, remove the surfacing around the perimeter and then
cut through the roof membrane around the perimeter of the of the sample. Do not pound on the sample, as this might cause
interply delamination. Carefully loosen and remove the roofing
box. Lift the specimen, including all associated loose materials,
from the roof and place it in a plastic bag. Fully identify the membrane including all adhered insulation. Observe and re-
specimen. Note if the insulation is adhered to the specimen or,
cord the kind and degree of attachment between the roofing
where insulation is not used, if bitumen is left on the deck, and membrane and the insulation or deck.
the type of deck. Estimate bitumen mass per unit area left on
4.2.1.4 Cut through the roof insulation with a blade long
the deck.
enough to penetrate all of the insulation layers. Observe and
4.2.1 Alternate Method:
record the type and thickness of each insulation layer, and the
4.2.1.1 Mark each sample as at least a square 356 mm [14
percent of the sample area adhered between the layers and
in.] on a side. Try to include a seam in each membrane sample.
between the insulation and the deck and vapor retarder.
During cold weather, use a square 457 mm [18 in.] on a side,
4.2.1.5 Cut and remove a small specimen of the vapor
since cold weather cutting may inadvertently break, distort or
retarder, if it is present, to observe its attachment to the deck
delaminate the sample. If the roofing membrane is mechani-
and to obtain a specimen for moisture content and analysis.
cally fastened, mark rectangular 864 by 457 mm [34 by 18 in.]
sample, with the longer dimension perpendicular to the length
NOTE 2—This procedure will not provide as accurate a measure of total
of the ply felts. Half of these large samples can be shipped to aggregate as the procedure described in 4.2.
Dimensions
Dimension Square (3.2) Rectangular (3.4)
mm in. mm in.
A 300 12 100 4
B 300 12 1000 40
C 150 6 150 6
D 40 1.5 40 1.5
E 40 1.5 40 1.5
1 1
F 3 ⁄8 3 ⁄8
FIG. 1 Cutting Template
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D2829/D2829M − 07 (2019)
4.3 If bituminous material has been absorbed by the insu- plies, using a heat lamp as needed to achieve minimum
lation (4.2), remove sufficient insulation to allow laboratory temperature required for separation. Do not distort the felts
analysis of absorbed bitumen mass (weight). (see 6.8 for an alternative method of separating the plies).
6.4.1 Measure the individual felts and calculate the area of
4.4 If felt lapping is to be determined, take a separate
each ply (due to lapping, not all plies will be the size of the
specimen at least 100 mm [4 in.] wide and not less than 1.12 m
original specimen). Follow the procedure in 6.2. Record the
[44 in.] long, cut at right angles to the long dimension of the
total area of all felts.
roofing felts.
6.4.2 Divide the sum of all individual felt areas (6.4.1) by
4.5 Protect each specimen from physical damage such as
the area of the original specimen (6.2) and record the results as
bending or breakage of the felts or coating layers during
“number of plies.”
removal and transportation. Protect from moisture, excessive
6.5 Calculate the mass per unit area of the original saturated
heat, and loss of material.
felts by multiplying the area of each ply determined in 6.4.1 by
2 2
the following values in g/m [lb/100 ft ] and dividing by the
5. Significance and Use
specimen area determined in 6.2. Add the masses per unit area
5.1 This practice is for the sampling and analysis of existing
for each felt, to find the total mass per unit area of the original
built-up roof systems. For roofs under construction, use Prac-
saturated felts. If all plies are the same, simply multiply the
tice D3617/D3617M.
assumed felt mass per unit area by the number of plies (6.4.2).
Use the manufacturer’s information for components not within
6. Procedure
the scope of the specifications in Table 1, using the factor
2 2
6.1 Preserve all identifications and log the specimens in the
48.825 to convert from lb/100 ft to g/m , and 0.02048 to
2 2
laboratory. Ensure continued identity and location of the
convert from g/m to lb/100 ft .
components within each specimen. Remove the insulation fully
6.6 Calculate the total interply bituminous material per unit
(if present), removing as little bituminous coating from the
area by subtracting the total mass per unit area of the original
underside of the membrane as possible.
“saturated felts” determined in 6.5 from the mass per unit area
6.2 Calculate the area of the specimen from eight different
determined by dividing the mass of felts and interply bitumen
measurements taken in each direction. Weigh the speci
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: D2829 − 07 (Reapproved 2013) D2829/D2829M − 07 (Reapproved 2019)
Standard Practice for
Sampling and Analysis of Existing Built-Up Roof Systems
This standard is issued under the fixed designation D2829;D2829/D2829M; the number immediately following the designation indicates
the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—Units information was editorially revised in January 2019.
1. Scope
1.1 This practice is a guide for removing test specimens from existing built-up roofing systems in the field and for determining
the approximate quantities of the components of that specimen (Note 1). Components determined may be:
1.1.1 Insulation components when they are part of the roof membrane system,
1.1.2 Plies of roofing felt,
1.1.3 Interply layers of bituminous material,
1.1.4 Top coating, and
1.1.5 Surfacing.
NOTE 1—This procedure is for the investigation of existing roofs and is not intended for new construction inspection.
1.2 This practice is applicable to both 914-mm (36-in.)[36-in.] and 1000-mm (39[39 ⁄8-in.)-in.] wide felt rolls.
1.3 The values stated in either SI (metric) units units or inch-pound units are to be regarded as standard.separately as standard.
The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each
system shall be used independently of the other, and values from the two systems shall not be combined.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. For specific precautionary information, see 6.3.2.1.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
D226D226/D226M Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing
D227D227/D227M Specification for Coal-Tar-Saturated Organic Felt Used in Roofing and Waterproofing
D249 Specification for Asphalt Roll Roofing (Organic Felt) Surfaced with Mineral Granules (Withdrawn 2002)
D250 Standard Specification for Asphalt-Saturated Asbestos Felt Used in Roofing and Waterproofing (Withdrawn 1991)
D371 Specification for Asphalt Roll Roofing (Organic Felt) Surfaced with Mineral Granules; Wide Selvage (Withdrawn 2002)
D1079 Terminology Relating to Roofing and Waterproofing
D2178D2178/D2178M Specification for Asphalt Glass Felt Used in Roofing and Waterproofing
D2626D2626/D2626M Specification for Asphalt-Saturated and Coated Organic Felt Base Sheet Used in Roofing
D3158 Specification for Asphalt Saturated and Coated Organic Felt Used in Roofing (Withdrawn 1983)
D3617D3617/D3617M Practice for Sampling and Analysis of Built-Up Roof Systems During Application
D3672 Standard Specification for Venting Asphalt-Saturated and Coated Inorganic Felt Base Sheet Used in Roofing (Withdrawn
1990)
D3909D3909/D3909M Specification for Asphalt Roll Roofing (Glass Felt) Surfaced With Mineral Granules
This practice is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.20 on Roofing
Membrane Systems.
Current edition approved May 1, 2013Jan. 1, 2019. Published May 2013January 2019. Originally approved in 1969. Last previous edition approved in 20072013 as
D2829 – 07.D2829 – 07 (2013). DOI: 10.1520/D2829-07R13.10.1520/D2829_D2829M-07R19E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
D2829/D2829M − 07 (2019)
D4601D4601/D4601M Specification for Asphalt-Coated Glass Fiber Base Sheet Used in Roofing
D4897D4897/D4897M Specification for Asphalt-Coated Glass-Fiber Venting Base Sheet Used in Roofing
D4990 Specification for Coal Tar Glass Felt Used in Roofing and Waterproofing
3. Terminology
3.1 Definitions—For definitions of terms used in this practice, refer to Terminology D1079.
4. Securing of Specimens in the Field
4.1 Do not disturb any surfacing in the area from which a specimen is to be taken. Cut each specimen at least 300 by 300 mm
(12[12 by 12 in.)in.] and use the total specimen taken in the field for laboratory analysis.
4.2 The recommended practice is to use a cutting template (Fig. 1) consisting of a 300 by 300-mm (12[12 by 12-in.)12-in.] metal
box with an open bottom. Place the box over the roof area that is to be removed, and while the template is held firmly in position,
remove the surfacing around the perimeter and then cut through the roof membrane around the perimeter of the box. Lift the
specimen, including all associated loose materials, from the roof and place it in a plastic bag. Fully identify the specimen. Note
if the insulation is adhered to the specimen or, where insulation is not used, if bitumen is left on the deck, and the type of deck.
Estimate bitumen mass per unit area left on the deck.
4.2.1 Alternate Method:
4.2.1.1 Mark each sample as at least a square 356 mm (14 in.)[14 in.] on a side. Try to include a seam in each membrane sample.
During cold weather, use a square 457 mm (18 in.)[18 in.] on a side, since cold weather cutting may inadvertently break, distort
or delaminate the sample. If the roofing membrane is mechanically fastened, mark rectangular 864 by 457 mm (34[34 by 18 in.)in.]
sample, with the longer dimension perpendicular to the length of the ply felts. Half of these large samples can be shipped to the
laboratory for analysis after the number of fasteners in the larger area is recorded.
4.2.1.2 Carefully broom off the loose aggregate, and spud off the adhered aggregate and flood coating at the perimeter of the
sample. (The application of dry ice at the areas to be spudded will ease the removal of the top coating during hot weather. A large
propane torch can also be used as an alternate to the dry ice method, to melt the top coating so that it can be easily removed with
a scraper and facilitate cutting.) Record the length and width of the sample. If the quantities of unadhered surfacing or total
surfacing are desired, collect and package the unadhered surfacing from the sample area.
4.2.1.3 Cut through the roofing membrane with a razor knife or sharp power cutting tool, taking care not to damage the edge
of the sample. Do not pound on the sample, as this might cause interply delamination. Carefully loosen and remove the roofing
membrane including all adhered insulation. Observe and record the kind and degree of attachment between the roofing membrane
and the insulation or deck.
Dimensions
Dimension Square (3.2) Rectangular (3.4)
mm in. mm in.
A 300 12 100 4
B 300 12 1000 40
C 150 6 150 6
D 40 1.5 40 1.5
E 40 1.5 40 1.5
1 1
F 3 ⁄8 3 ⁄8
FIG. 1 Cutting Template
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D2829/D2829M − 07 (2019)
4.2.1.4 Cut through the roof insulation with a blade long enough to penetrate all of the insulation layers. Observe and record
the type and thickness of each insulation layer, and the percent of the sample area adhered between the layers and between the
insulation and the deck and vapor retarder.
4.2.1.5 Cut and remove a small specimen of the vapor retarder, if it is present, to observe its attachment to the deck and to obtain
a specimen for moisture content and analysis.
NOTE 2—This procedure will not provide as accurate a measure of total aggregate as the procedure described in 4.2.
4.3 If bituminous material has been absorbed by the insulation (4.2), remove sufficient insulation to allow laboratory analysis
of absorbed bitumen mass (weight).
4.4 If felt lapping is to be determined, take a separate specimen at least 100 mm (4 in.)[4 in.] wide and not less than 1.12 m
(44 in.)[44 in.] long, cut at right angles to the long dimension of the roofing felts.
4.5 Protect each specimen from physical damage such as bending or breakage of the felts or coating layers during removal and
transportation. Protect from moisture, excessive heat, and loss of material.
5. Significance and Use
5.1 This practice is for the sampling and analysis of existing built-up roof systems. For roofs under construction, use Practice
D3617D3617/D3617M.
6. Procedure
6.1 Preserve all identifications and log the specimens in the laboratory. Ensure continued identity and location of the
components within each specimen. Remove the insulation fully (if present), removing as little bituminous coating from the
underside of the membrane as possible.
6.2 Calculate the area of the specimen from eight different measurements taken in each direction. Weigh the specimen, including
all associated loose materials (except insulation), being careful to avoid loss of any component, and calculate the mass per unit
area. Dry the insulation removed in 4.3 to constant mass and record.
6.3 Place the specimen on aluminum foil or release paper and carefully scrape off the top surfacing (if any) and top coating
without damaging the top felt. Use heat only to produce the lowest temperature required to remove the coating.
2 2
NOTE 3—This will usually leave 200 to 400 g/m (4[4 to 8 lb/100 ft )] of bituminous material on the surface of the roofing felt.
6.3.1 Collect the surfacing and top coating, including any loose material taken with the specimen, and weigh.
6.3.2 Separate surfacing material from the surfacing-top coating mixture by solvent washing on an 850-μm (No. 20)[No. 20]
sieve.
NOTE 4—The recommended solvent for coal-tar pitch is carbon disulfide (CS ). Complete extraction of coal-tar pitch is not possible. Extraction with
carbon disulfide may result in a recovery error of coal-tar pitch in the range from 17 to 38 %.
6.3.2.1 Warning—Carbon disulfide is toxic when taken internally or when inhaled. Conduct the test in a hood, or other
well-ventilated location. Avoid prolonged or repeated contact with the skin and inhalation of vapors.
6.3.3 When all traces of bituminous materials have been removed, dry the surfacing retained on the sieve in an oven at 100°C
(212°F),[212°F], cool, and weigh. The approximate mass per unit area of the top coating is the difference between this mass and
the mass obtained in 6.3.1, divided by the specimen area obtained in 6.2.
6.4 Remove all bituminous material from the bottom of the membrane (see 6.3), then weigh the membrane. Separate the plies,
using a heat lamp as needed to achieve minimum temperature required for separation. Do not distort the felts (see 6.8 for an
alternative method of separating the plies).
6.4.1 Measure the individual felts and calculate the area of each ply (due to lapping, not all plies will be the size of the original
specimen). Follow the procedure in 6.2. Record the total area of all felts.
6.4.2 Divide the sum of all individual felt areas (6.4.1) by the area of the original specimen (6.2) and record the results as
“number of plies.”
6.5 Calculate the mass per unit area of the original saturated felts by multiplying the area of each ply determined in 6.4.1 by
2 2
the following values in g/m (lb/100[lb/100 ft )] and dividing by the specimen area determined in 6.2. Add the masses per unit
area for each felt, to find the total mass per unit area of the original saturated felts. If all plies are the same, simply multiply the
assumed felt mass per unit area by the number of plies (6.4.2). Use the manufacturer’s information for components not within the
2 2 2
scope of the specifications in Table 1, using the factor 48.825 to convert from lb/100 ft to g/m , and 0.02048 to convert from g/m
to lb/100 ft .
6.6 Calculate the total interply bituminous material per unit area by subtracting the total mass per unit area of the original
“saturated felts” determined in 6.5 from the mass per unit area determined by dividing the mass of felts and interply bitumen in
6.4 by the specimen size in 6.2.
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D2829/D2829M − 07 (2019)
TABLE 1 Weights/Types of Felts
Specification Type Material lb/100 ft g/m
D226 I asphalt-organic felt 11.5 560
D226/D226M I asphalt-organic felt 11.5 560
II 26 1270
D227 coal-tar organic felt 13 635
D227/D227M coal-tar organic felt 13 635
D249 I asphalt-organic roll 74 3610
II roofing (granule surfaced) 71.5 3490
D250 I asphalt-asbestos felt 13 635
II 28 1370
III 17 830
IV 21 1025
D371 I asphalt-organic wide- 37 1810
II selvage roofing 46.3 2260
III (granule surfaced) 35.5 1733
IV 42.8 2090
D2178 I asphalt-glass felt 7.5 366
D2178/D2178M I asphalt-glass felt 7.5 366
II 14 684
III 9.7 474
IV 7 342
D2626 asphalt-organic base felt 37 1810
D2626/D2626M asphalt-organic base felt 37 1810
D3158 asphalt-asbestos base felt 29 1416
D3672 I venting asphalt-inorganic 60 2930
II base felt (granule surfaced) 50 2440
D3909 asphalt-glass roofing felt granule surfaced 83 4050
D3909/D3909M asphalt-glass roofing felt granule surfaced 83 4050
D4601 I asphalt-glass base felt 13.4 654
D4601/D4601M I asphalt-glass base felt 13.4 654
II 15.5 756
D4897 I asphalt-glass venting 50 2440
D4897/D4897M I asphalt-glass venting 50 2440
II base felt 55 2685
D4990 I coal-tar glass felt 7 342
6.6.1 To obtain the average interply mopping, take the “total interply bitumen per unit area” determined in 6.6 and divide by
one less than the previously determined number of plies (6.4.2).
6.6.2 Remove any bitumen absorbed by the insulation (6.2) by solvent extraction. Dry the residue to constant mass and cool
to room temperature. Determine the absorbed bitumen per unit area by subtracting the mass of residue from the mass recorded in
6.2 and dividing the result by the specimen area (6.2).
6.6.3 Determine the total applied bitumen by deducting the mass per unit area of surfacing (6
...