ASTM C1570-22

Standard Test Method for Wind Resistance of Concrete and Clay Roof Tiles (Air Permeability Method)

SIGNIFICANCE AND USE
5.1 The air permeability of roofing systems constructed from discrete elements, as is the case for clay and concrete tile and slate roof systems, is a critical factor in determining the wind resistance of the roof system. The ability of the roof system to relieve wind-induced uplift pressures as a result of the overall air permeability of the roof assembly relates to the resistance of the roof system to damage induced by wind.  
5.2 Natural wind conditions differ with respect to intensity, duration, and turbulence; these conditions are beyond the means of this test method to simulate.
SCOPE
1.1 The air permeability of tile roofing systems is a critical factor in determining the wind resistance of tile roofing as applied to a roof. This Standard describes a procedure for measuring the air permeability of clay and concrete tile and slate roof systems when applied to a small section of roof deck in accordance with the manufacturer's instructions.  
1.2 This test procedure measures the air permeability of a laid array of unsealed clay or concrete roof tiles or slates. The tiles or slates shall have a thickness between 1/8-in. (3-mm) and 2-in. (51-mm).  
1.3 The text of this test method references notes and footnotes, which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.5 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 of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 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: Published
• Publication Date: 28-Feb-2022
• ICS: 91.060.20 - Roofs
• Technical Committee: C15 - Manufactured Masonry Units
• Drafting Committee: C15.06 - Roofing Tile

Standards Content (Sample)

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.
Designation: C1570 − 22
Standard Test Method for
Wind Resistance of Concrete and Clay Roof Tiles (Air
1
Permeability Method)
This standard is issued under the fixed designation C1570; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
1.1 The air permeability of tile roofing systems is a critical 2.1 ASTM Standards:
factor in determining the wind resistance of tile roofing as C1167Specification for Clay Roof Tiles
applied to a roof. This Standard describes a procedure for C1232Terminology for Masonry
measuring the air permeability of clay and concrete tile and C1492Specification for Concrete Roof Tile
slateroofsystemswhenappliedtoasmallsectionofroofdeck
2.2 SBCCI Standard:
in accordance with the manufacturer’s instructions.
SBCCI SSDT 11,SBCCI Test Standard for Determining
Wind Resistance of Concrete or Clay Roof Tiles
1.2 This test procedure measures the air permeability of a
laid array of unsealed clay or concrete roof tiles or slates. The
NOTE 1—This standard is based on the International Code Council’s
1
tilesorslatesshallhaveathicknessbetween ⁄8-in.(3-mm)and
ICC/SBCCI SSTD 11 and work derived from the tile industry’s testing
programs completed in the Redland Wind Tunnel in the UK.
2-in. (51-mm).
2.3 ASCE Standard:
1.3 The text of this test method references notes and
ASCE 7,Minimum Design Loads for Buildings and Other
footnotes,whichprovideexplanatorymaterial.Thesenotesand
3
Structures
footnotes (excluding those in tables and figures) shall not be
considered as requirements of the standard.
3. Terminology
1.4 The values stated in inch-pound units are to be regarded
3.1 Definitions—For definitions of terms used in this test
as standard. The values given in parentheses are mathematical
method refer toTerminologyC1232, and Specifications C1167
conversions to SI units that are provided for information only
and C1492.
and are not considered standard.
1.5 This standard does not purport to address all of the
4. Principle of the Test Method
safety concerns, if any, associated with its use. It is the
4.1 Air pressure is applied to the underside of an air
responsibility of the user of this standard to establish appro-
permeable assembly of a specified type of roofing elements.
priate safety, health, and environmental practices and deter-
The difference in air pressure across the assembly and the
mine the applicability of regulatory limitations prior to use.
volumeairflowratearemeasuredandusedtodeterminetheair
1.6 This international standard was developed in accor-
permeability of the assembly.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Significance and Use
Development of International Standards, Guides and Recom-
5.1 The air permeability of roofing systems constructed
mendations issued by the World Trade Organization Technical
from discrete elements, as is the case for clay and concrete tile
Barriers to Trade (TBT) Committee.
and slate roof systems, is a critical factor in determining the
1 2
This test method is under the jurisdiction of ASTM Committee C15 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Manufactured Masonry Units and is the direct responsibility of Subcommittee contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
C15.06 on Roofing Tile. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved March 1, 2022. Published April 2022. Originally the ASTM website.
3
approved in 2003. Last previous edition approved in 2016 as C1570–03(2016). Available fromAmerican Society of Civil Engineers (ASCE), 1801Alexander
DOI: 10.1520/C1570-22. Bell Dr., Reston, VA 20191, http://www.asce.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C1570 − 22
wind resistance of the roof system. The ability of the roof 7.2 Supply air from the airflow generator to induce a
system to relieve wind-induced uplift pressures as a result of pressure difference between the inside and outside of the
2
the overall air permeability of the roof assembly relates to the plenum chamber at test pressure but not less than 10.5 lbf/ft
resistance of the roof system to damage induced by wind. (500 Pa). The air tightness of the plenum chamber shall be
consideredsatisfa
...

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.
Designation: C1570 − 03 (Reapproved 2016) C1570 − 22
Standard Test Method for
Wind Resistance of Concrete and Clay Roof Tiles (Air
1
Permeability Method)
This standard is issued under the fixed designation C1570; 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.
1. Scope
1.1 The air permeability of tile roofing systems is a critical factor in determining the wind resistance of tile roofing as applied to
a roof. This Standard describes a procedure for measuring the air permeability of clay and concrete tile and slate roof systems when
applied to a small section of roof deck in accordance with the manufacturer’s instructions.
1.2 This test procedure measures the air permeability of a laid array of unsealed clay or concrete roof tiles or slates. The tiles or
1
slates shall have a thickness between ⁄8-in. (3-mm) and 2-in. (51-mm).
1.3 The text of this test method references notes and footnotes, which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.5 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 of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.6 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
2.1 ASTM Standards:
3
C43 Terminology of Structural Clay Products (Withdrawn 2009)
C1167 Specification for Clay Roof Tiles
C1232 Terminology for Masonry
C1492 Specification for Concrete Roof Tile
2.2 SBCCI Standard:
SBCCI SSDT 11, SBCCI Test Standard for Determining Wind Resistance of Concrete or Clay Roof Tiles
1
This test method is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.06 on Roofing
Tile.
Current edition approved Dec. 1, 2016March 1, 2022. Published December 2016April 2022. Originally approved in 2003. Last previous edition approved in 20092016
as C1570 – 03(2009).(2016). DOI: 10.1520/C1570-03R16.10.1520/C1570-22.
2
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1570 − 22
NOTE 1—This standard is based on the International Code Council’s ICC/SBCCI SSTD 11 and work derived from the tile industry’s testing programs
completed in the Redland Wind Tunnel in the UK.
2.3 ASCE Standard:
3
ASCE 7, Minimum Design Loads for Buildings and Other Structures
3. Terminology
3.1 Definitions—For definitions of terms used in this test method refer to Terminology C43C1232, and Specifications C1167 and
C1492.
4. Principle of the Test Method
4.1 Air pressure is applied to the underside of an air permeable assembly of a specified type of roofing elements. The difference
in air pressure across the assembly and the volume air flow rate are measured and used to determine the air permeability of the
assembly.
5. Significance and Use
5.1 The air permeability of roofing systems constructed from discrete elements, as is the case for clay and concrete tile and slate
roof systems, is a critical factor in determining the wind resistance of the roof system. The ability of the roof system to relieve
wind-induced uplift pressures as a result of the overall air permeability of the roof assembly relates to the resistance of the roof
system to damage induced by wind.
5.2 Natural wind conditions differ with respect
...