An Urgent Bulletin from CSA International

Transcription

1 Ref No: I PLUMBING PRODUCTS NO. 230 Date: August 17, 2012 An Urgent Bulletin from CSA International New Service available as of today Apply any time to have your products evaluated Announcing: Publication of Technical Information Letter (TIL) No. MSE-62, Roof flashings for various roof penetrations and sizes. Class No: , BUILDING PRODUCTS AND MATERIALS - Roof Flashing To purchase the Standard, visit us at Who is affected? Manufacturers of roof flashings. What do you do? 1. This publication provides for new certification services that do not affect your currently certified product designs. 2. Please contact CSA engineering staff if you have questions or need information concerning this publication and how it applies to you. 3. If you would like to take advantage of the new certification services, initiate a certification project by contacting our Client Services Centre at Please supply appropriate supporting documentation* and we will inform you of the samples required. *which includes technical information, company name, address, factory locations and CSA file number or master contract number (if assigned), and any other relevant documentation. Introduction: Should this T.I.L. not be incorporated into the standard within five (5) years, it may be withdrawn and certifications will be cancelled. This T.I.L. contains construction, marking and test requirements for prefabricated flashings for various roof penetration configurations and sizes with a rigid outside surface Background and Rationale: In addition to the traditional vent pipes and power masts, other equipments are being installed on the roof. Connections to the equipments penetrate the roof. Proper flashing around these roof penetrations are required to prevent water from entering the areas under the roof. CSA standard B272 covers roof flashings specifically designed for plumbing vent pipe. The industry requested for an expansion to the scope of B272 in order to cover roof penetrations of different configurations. For questions specific to your file or products contact your regular CSA International engineering staff. Go to and enter your Master Contract # and the class numbers associated with this Informs to view your certified products. For technical questions on this Informs Contact Ned Dickey by phone , fax or ned.dickey@csagroup.org Visit us at Click on "Contact Us" for the online phone listing of our Offices and Partners Page 1 of 7

2 ATTACHMENT 1 TECHNICAL INFORMATION LETTER NO. TIL MSE-62 CSA Group Product Group: Plumbing Products Date: August 17, 2012 Prepared By: Issued By: Approved By: Cho L. Yeung Ned Dickey Terry Burger EQUIPMENT: Roof flashings for various roof penetration configurations and sizes. ITEM: Interim Certification Requirements for Prefabricated Self-Sealing Flashings for Various Roof Penetration Configurations and Sizes. REFERENCES: CSA B Prefabricated Self-Sealing Roof Vent Flashings CSA C22.2 No General Requirements and Methods of Testing for Nonmetallic Conduit ASTM D a - Standard Test Method for Vulcanized Rubber and Thermoplastic Elastomers - Tension ASTM D Standard Test Method for Rubber Property Effect of Liquids ASTM D Standard Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers ASTM D Standard Test Method for Rubber Deterioration Cracking in an Ozone Controlled Environment ASTM G a - Standard Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials CGSB 41-GP-20M-76 - Extrusions, Vinyl, Nonrigid, for Windows and Doors Purpose This Technical Information Letter (T.I.L.) has been prepared to provide requirements for certification of prefabricated self-sealing flashing for various roof penetration configurations in Canada. Background CSA standard B272 is for vent pipe flashings only. There is no provision for flashings designed to accommodate other types of roof penetrations Rationale In addition to the traditional vent pipes and power masts, other equipments are being installed on the roof. Connections to the equipments penetrate the roof. Proper flashing around these roof penetrations are Page 2 of 7

3 required to prevent water from entering the areas under the roof. The industry has requested for amendments to the requirements in CSA B272 to properly evaluate and test roof flashings for various roof penetrations. Scope This Technical Information Letter (or TIL) contains construction, marking and test requirements for prefabricated flashings for various roof penetration configurations and sizes with a rigid outside surface. The flashings covered by this TIL are not intended for roof penetrations with non-rigid surfaces (such as insulated pipes). Requirements 1. General This TIL specifies the minimum requirements for factory-built, single or multiple-penetration roof flashings used to effect a permanent weather seal between the flashing and the roof penetration when installed according to the manufacturers' instructions. This document incorporated the applicable requirements from B272 and is to be used as a standalone document. 2. Definition Roof penetration: an object that has a smooth rigid surface that runs from above the roof to the area inside the roof. Examples of roof penetration include but are not limited to plumbing vent pipes, electrical conduits, electrical cables, etc. 3. Construction 3.1 Materials General Materials used for flashings shall be free from visible cracks, holes, or other injurious defects and shall be suitable for long-term outside use Metal materials Metal flashings shall consist of one of the following: (a) lead sheet not less than mm thick; (b) copper sheet not less than 0.33 mm thick; (c) aluminum sheet not less than 0.51 mm thick; (d alloyed zinc sheet not less than 0.35 mm thick; or (e) galvanized steel sheet not less than 0.41 mm thick Polymeric materials The properties of flexible and rigid polymeric materials shall conform to Clause Design Prefabricated roof flashings shall be designed to allow for the thermal movement of the roof penetration. 3.3 Assembly Bolts, rivets, screws, welding, or other means of unit assembly, shall use compatible materials. Page 3 of 7

4 3.4 Quality of work Product quality shall be consistent with good commercial practice, including (a) mating parts shall fit properly; (b) parts shall be properly aligned; and (c) metal flashings shall have no sharp edges or corners that would be detrimental to the waterproofing membrane. 3.5 Installation Prefabricated roof flashings shall be so constructed that they can be installed per manufacturer's instructions as a complete unit with the roof penetration in place without additional sealing materials around the roof penetration Roof flashing for different sizes of the same type of roof penetration configuration It is permissible for roof flashings to be modified during installation in order to accommodate roof penetrations of different sizes. The roof flashing shall be designed to allow for modifications and the manufacturer shall provide instructions on making the modifications. In addition, the modifications shall (a) be limited to changing the size of the opening(s) that accommodates the roof penetration; (b) consist of removal of part of the flashing by hand or with the use of a simple tool (e.g. a utility knife); and (c) not affect the seal around the roof penetration. 3.6 Flashing dimensions Flashing intended for installation on a flat (pitched or unpitched) surface shall have a minimum flat flange width measured from any point on the edge of 100 mm (4 in.) This does not apply to flashing intended for roofing systems with an uneven top surface such as tiled roof, slate roof, steel roof, etc The minimum boot height shall be 44.5 mm (1-3/4 in.). Flashings for use on flat (unpitched) roofs shall have a minimum height of 150 mm (6 in) above the intended finished surface of the roof when installed. 4. Polymeric materials 4.1 Elongation Flexible materials shall have a minimum elongation of 210% when tested in the unaged condition in accordance with ASTM Standard D For rigid materials, the manufacturer shall specify the elongation of the unaged material. The elongation shall be within ±20% of the specified values when tested in accordance with ASTM Standard D After heat ageing at 70 ± 1 C for 168 ± 0.5 h, rigid and flexible materials shall show a maximum decrease in elongation of 20%. 4.2 Ozone resistance Rigid and flexible materials shall exhibit no cracking at two times magnification when tested in accordance with ASTM Standard D1149. The test shall be performed at 40 ± 1 C for 72 ± 1 h in an ozone concentration of 0.50 ± 0.05 ppm (volumetric ratio). Page 4 of 7

5 4.3 Water absorption The change in mass of a specimen measuring 25 x 50 x 2 mm shall not exceed 10% when tested in accordance with ASTM Standard D471. The test shall be performed at 70 ± 1 C for 48 ± 0.5 h using distilled water as the standard test liquid. 4.4 Tear strength The tear resistance of the elastomer shall be not less than 24.5 kn/m (140 lb/in) when tested in accordance with ASTM Standard D624 using Die C samples. 4.5 Low temperature flexibility Test specimens measuring approximately 150 x 20 x 2 mm shall be cut from the finished product. In case of dispute, prepared specimens* shall be used. The specimens and a 19 ± 0.5 mm diameter mandrel shall be conditioned at -20 ± 1 C for at least 1 h. Each test specimen shall be bent at least 180 around the mandrel in the cold chamber. Bending shall occur during 5 to 10 s period. After bending there shall be no cracks visible to normal or corrected-to normal vision. *Specimens should be prepared in accordance with CGSB Standard 41-GP-20M. 4.6 Weather exposure Samples having the same thickness as the thinnest section of the flashing shall exhibit a maximum loss of 50% in each of tensile strength and elongation after being conditioned for 1000 ± 1 h in accordance with ASTM Standard G155, using Cycle 1 of Table X3.1 in the ASTM Standard. 4.7 Chemical Resistance Samples shall show no evidence of softening or disintegration when tested in accordance with CSA Standard C22.2 No , clause 6.7, using the solutions listed below. The immersion period shall be 30 d. Chemical Concentration by mass in distilled water Sulphuric acid 5% Sodium hydroxide 0.2 N 5. Test Requirements 5.1 Rain Test The flashing shall allow no water leak through the seal between the flashing and the roof penetration when tested for 60 ± 5 min in accordance with Clause Impact Resistance Test Flashings made from rigid polymeric materials shall show no evidence of cracking or splitting when tested in accordance with Clause Test Procedures 6.1 General Flashings shall be tested in their intended installed position as recommended by the manufacturer Flashings intended for use on sloping surfaces shall be tested on an adjustable test stand at the maximum and minimum slopes recommended by the manufacturer Page 5 of 7

6 Where modifications to the flashing is required to accommodate roof penetrations of various sizes, the flashing shall be tested at least once after it has been modified according to the manufacturer's instructions. 6.2 Rain Test Install the flashing on a test stand, with the flashing installed on the roof and sealed as it would be in actual use and with the appropriate sized roof penetration in place Expose the flashing to a cold water spray at a flow rate of 120 ± 10 L/h per m 2 (2.95 ± 0.25 gal/h per ft 2 ) of roof surface projected downward, at an angle of approximately 15 to the vertical and a full 360 in azimuth, at all angles of the roof pitch for which the flashing is designed. Check for leaks at the flashing/roof penetration interface. 6.3 Impact Resistance Test Apparatus The following apparatus or equivalent shall be used: (a) a tup (falling weight) having the geometry of Figure 1. It shall weigh 9 ± 0.03 kg (20 lb ± 1 oz) (b) a flat, level, solid surface, to support the specimen; (c) a guide tube or guide rails, to ensure that the tup impacts the specimen at the proper location; and (d) auxiliary equipment for the tup release, tup elevation, etc, may also be used. The distance from the bottom of the tup to the surface of the specimen shall be 153 ± 3 mm (6 ± 1/8 in.) Conditioning of Specimens Test specimens shall be conditioned for not less than 40 h at 0 ± 2 C and 50 ± 5% relative humidity before being tested Specimens shall be tested on a "go" or "no go" basis. Page 6 of 7

7 Five specimens shall be tested. Each specimen shall be impacted in the area where fasteners are used to hold it in place when in use. When two or more specimens fail, the product does not meet the impact requirement. When only one specimen fails, another five specimens shall be tested. To meet the specified impact requirement, none of the five additional specimens shall fail. Nine non-failures out of ten specimens tested shall be acceptable Definition of Failure Failure in the test specimens shall be shattering or any crack or split that was created by the impact and that can be seen by the naked eye. Lighting devices shall be used to assist in examining for cracks and splits. 7. Marking 7.1 Each flashing shall be permanently marked with the following: (a) manufacturer s name, tradename, or trademark; (b) range of roof pitch for which the flashing is designed; (c) type of roof penetration for which the flashing is designed (d) nominal size of the roof penetration; and (e) where applicable, the surface material of the roof penetration (e.g. cast iron, plastic) 7.2 The information listed in Clause 7.1 shall be visible after installation and may be indicated using one or more of the following methods: (a) adhesive label; (b) die stamp; (c) waterproof ink; and (d) moulded in. Page 7 of 7