Roofing Installation Manual: Concealed Fastener Panels Material Data, Trim Details, and Step-by-Step Instructions

Transcription

1 Roofing Installation Manual: Concealed Fastener Panels Material Data, Trim Details, and Step-by-Step Instructions 1974 Livengood Ave Fairbanks, AK

2 Roof Installation Guide Concealed Fastener Panels NOTES TO INSTALLER RECOMMENDED TOOLS & EQUIPMENT PANEL DATA FASTENING HOW TO BEGIN ORDER OF INSTALLATION HOW TO SQUARE YOUR ROOF TRIM DETAILS CHIMNEY & SKYLIGHT DETAILS

3 NOTES TO INSTALLER THIS INSTALLATION GUIDE IS INTENDED TO BE AN AID AND DOES NOT DEPICT ALL SITUATIONS. MODIFICATIONS ARE THE RESPONSIBILITY OF THE DESIGNER/USER AND SHOULD TAKE INTO CONSIDERATION THE CLIMATE, WIND AND SNOW LOAD CONDITIONS. WHERE POSSIBLE, PANELS SHOULD BE LAPPED AWAY FROM PREVAILING WIND. Substrates The details shown in this guide depict the roofing being installed over 5/8 plywood with a waterproof membrane applied to it. All of these panels can be installed over spaced support members. Consult an All Steel Inc. representative for more information. Minimum Slope Requirements All panels in this guide require a 1:12 or greater roof pitch, unless stated otherwise. Underlayments Before panel installation, a minimum of 30 lb. felt should be installed per manufacturer s recommendations. Underlayment is to be lapped in a manner so it will shed water. Where more protection is required (in valleys, around chimneys, skylights, and below pitch changes), use a self-adhering cold-applied rubberized asphalt membrane. Granulated ice & water shield is not acceptable. Oil-Canning Flat surfaces in the panels will commonly display waviness referred to as oil-canning. This is caused by the steel mill tolerances of the material and variations in the substrate and roofing underlayment. Oil-canning is a characteristic, not a defect of panels manufactured from light gauge metal. Panels are factory quality checked and corrected prior to manufacturing your order. Warranty All Steel Inc. offers a 20 year transferrable paint warranty on all SMP Paint System products (26, 29 gauge panels). All Steel Inc. offers a 25 year transferrable paint warranty on all PVDF / Kynar Paint System products (22, 24 gauge panels). 2

4 RECOMMENDED TOOLS & EQUIPMENT Screw Guns Adjustable clutch type screw guns are recommended for screws with gasketed sealing washers to prevent over- or under-tightening of screws. Impact type screw guns are great for all blind fasteners and can also be used on gasketed fasteners with much attention paid to tightness of fastener. Drill Bits and Driver Bits 1/8 DRILL BIT 7/32 DRILL BIT 1/4 DRILL BIT 5/16 DRIVER BIT 1/4 DRIVER BIT #2 & #3 PHILIPS DRIVER BIT #2 SQ DRIVER BIT Cutting Tools TIN SNIPS green and red offset snips will provide the widest range of straight and left to right finish cutting. ELECTRIC/AIR SHEARS good for blind cuts and ripping panels length ways. CIRCULAR SAWS when equipped with a sharp carbide blade designed for cutting steel, a circular saw will work best for cutting panels across their width. For instance, when cutting gable ends and valley angles. WARNING use of abrasive cutting blades is not recommended; they can overheat the metal and cause the paint to peel away from the metal. If panels are to be cut, or pre-drilled, be certain to wipe free any metal chips that have accumulated on the panel. Other Tools POP RIVET TOOL used for miscellaneous fastening of trim and flashing details. FOLDING TOOLS these can be either locking or pressure clamping. Used mainly for bending blind tabs on trim. STRINGS and CHALK LINES used to assist in the alignment of panels and trim. RUBBER MALLET used for snap seam panels. HAND CRIMPER and ELECTRIC SEAMER used for mechanically seamed panels. 3

5 PANEL DATA ALL STEEL s 29 and 26 gauge panels are finished with a high-performance baked-on silicone-modified polyester (SMP) paint system on an AZ50 substrate. This cutting edge resin technology offers unbeatable durability, superior color retention and resistance to dirt accumulation, ensuring low maintenance, lasting beauty and outstanding value. ALL STEEL s 24 and 22 gauge panels are finished with a specialized Polyvinylidene Flouride (PVDF) / Kynar paint system on an AZ50 substrate. PVDF paints are developed using ceramic pigments combined with fluoropolymer resins to create high end coatings for metals. PVDF pre-painted steel has been the go-to product for architects and designers around the world to achieve beautiful, vibrant colors with the added benefits of flexibility, durability, and low maintenance. PVDF prepainted steel is best suited for high-end applications such as commercial or residential roofing, pre-engineered buildings, architectural wall panels, and other applications where durability and long-lasting performance are required. ALL STEEL INC. follows the national A.I.S.I. (American Iron and Steel Institute) specifications manual for tolerances in galvanized sheet metal. 4

6 Weight Gauge Grade Paint 1" Snap Seam - 16" 1" Snap Seam - 12" SMP 1.57 lb/lf 118 lb/sq 1.26 lb/lf 126 lb/sq Kynar 2.00 lb/lf 150 lb/sq 1.61 lb/lf 161 lb/sq 1" Snap Seam - 16" - 26 GA Wind Uplift Load (Internal Pressure) psf Substrate Fastener 9" 12" 1/2" Plywood #10 x 1" Pan Head /8" Plywood #10 x 1" Pan Head /16" OSB #10 x 1" Pan Head Steel Yield Stress: 26 GA = 80,000 psi, 24 GA = 50,000 psi Galvanized Steel Gauge, AZ-50 1 ½ Bearing Length Load Span Tables Based on Working Stress. Flexural Design analysis according to AISI Specification for the Design of Light Gauge Cold-Formed Steel Structural Members May Continuous Span Loading applies to sheets continuous over three or more spans. Weight of sheet has not been allowed for when calculating live load and uplift. Deflection (L/180) limiting live load based on deflection of span. Metal thickness based on minimum ASTM specifications for allowable load calculations. Note: The load tables have been compiled for the design of steel roofing and siding used in conjunction with either wood or steel framed structures. ALL STEEL INC. assumes no responsibility, either expressed or implied, for its use. All gauges conform to ASTM A446 Grade E (80,000 min. yield) unless otherwise designated at time of order. 5

7 Weight Gauge Grade Paint 1.75" Thin Seam - 16" 1.75" Thin Seam - 12" Kynar 2.10 lb/lf 158 lb/sq 1.72 lb/lf 172 lb/sq 1.75" Thin Seam - 16" Live Load (Strength) psf Wind Uplift Load (Internal Pressure) psf Span (ft) 2.5' 3' 3.5' 4' 5' 2' 2.5' 3' 3.5' 4' 24 GA - single GA - 2 span GA - 3 span GA - 4 span " Thin Seam - 12" Live Load (Strength) psf Wind Uplift Load (Internal Pressure) psf Span (ft) 2.5' 3' 3.5' 4' 5' 2' 2.5' 3' 3.5' 4' 24 GA - single GA - 2 span GA - 3 span GA - 4 span Steel Yield Stress: 50,000 psi Galvanized Steel Gauge, AZ-50 1 ½ Bearing Length Load Span Tables Based on Working Stress. Continuous Span Loading applies to sheets continuous over three or more spans. Weight of sheet has not been allowed for when calculating live load and uplift. Deflection (L/180) limiting live load based on deflection of span. Metal thickness based on minimum ASTM specifications for allowable load calculations. Wind Uplift Loads in accordance to ASTM E Use factor of safety for Design Loads. Note: The load tables have been compiled for the design of steel roofing and siding used in conjunction with either wood or steel framed structures. ALL STEEL INC. assumes no responsibility, either expressed or implied, for its use. All gauges conform to ASTM A446 Grade E (80,000 min. yield) unless otherwise designated at time of order. 6

8 Weight Gauge Grade Paint 2" Mech. Seam - 16" 2" Mech. Seam - 12" Kynar 2.13 lb/lf 160 lb/sq 1.75 lb/lf 175 lb/sq Kynar 2.59 lb/lf 194 lb/sq 2.12 lb/lf 212 lb/sq 2" Mech. Seam - 16" Live Load (Strength) psf Wind Uplift Load (Internal Pressure) psf Span (ft) 2.5' 3' 3.5' 4' 4.5' 2' 2.5' 3' 4' 5' 24 GA simple span GA continuous span GA simple span GA continuous span " Mech. Seam - 12" Live Load (Strength) psf Wind Uplift Load (Internal Pressure) psf Span (ft) 2.5' 3' 3.5' 4' 4.5' 2' 2.5' 3' 4' 5' 24 GA simple span GA continuous span GA simple span GA continuous span Steel Yield Stress: 50,000 psi Galvanized Steel Gauge, AZ-50 1 ½ Bearing Length Load Span Tables Based on Working Stress. Continuous Span Loading applies to sheets continuous over three or more spans. Weight of sheet has not been allowed for when calculating live load and uplift. Deflection (L/180) limiting live load based on deflection of span. Metal thickness based on minimum ASTM specifications for allowable load calculations. Wind Uplift Loads in accordance to ASTM E Use factor of safety for Design Loads. Note: The load tables have been compiled for the design of steel roofing and siding used in conjunction with either wood or steel framed structures. ALL STEEL INC. assumes no responsibility, either expressed or implied, for its use. All gauges conform to ASTM A446 Grade E (80,000 min. yield) unless otherwise designated at time of order. 7

9 Wind Uplift: Steel roofing panels provide superior uplift resistance to wind loads and are the go-to design choice for sloped roofs in high-wind regions. Wind uplift design requirements are dependent on roof Height, Exposure category, Importance classification, and Basic Wind Speed for the building location (basic wind speeds in Alaska range from 90 mph in the Interior to 130 mph in some Coastal areas). For example, a residence in Fairbanks, with a generalized structure height of 30 ft., must be designed to meet wind uplift loads of at least 27 psf. Uplift loads for Alaska s basic wind speeds are shown in the following table: Wind Speed (mph) Uplift Load* (psf) *Based on SEI/ACSE 7-02 standard for low slope roofs, generalized 30 Height at roof edge, Exposure B (urban, suburban, wooded areas), Importance Classification II (residential, light commercial). Areas of discontinuity are subject to higher spikes in wind pressure; building geometry will effect aerodynamic pressures at edges and corners of the roof. This figure illustrates the importance of properly fastening eave, gable, and ridge flashings. Negative values indicate suction pressure acting upward. Loads based on 90 mph basic wind speed, exposure B, importance classification II, and 30 roof height. 8

10 FASTENING Screw fasteners have been proved to have two to three times the holding power of nails. Screws should have a minimum penetration of 5/8" into wood. Generally, #10 x 1" Pancake Head screw fasteners are used for concealed fastener panels. 1 Snap Seam panels are fastened through pre-punched slots in the lower lap screw flange Thin Seam and 2 Mechanical Seam panels are attached with their respective clips, 2 screws per clip. Bearing plates are used under clips when installing panels over rigid insulation. Nails are not recommended! The use of nails to fasten panels is NOT recommended and will void any warranty. DO NOT OVERDRIVE exposed fasteners so as to dimple or distort the panel accessories. Washers should be in firm contact with the panel. 9

11 1" Snap Seam Slotted Panel 1.75" Thin Seam Clip Bearing Plate 2" Mech. Seam Clip Bearing Plate 10

12 HOW TO BEGIN Determine quantity and length of panels needed. Determine quantity and type of flashings and accessories. Pitch of the roof(s) must be known in order to fabricate trim and flashings. For roof purlin spacing, refer to Load Tables for the panel you are planning to install and Maximum Fastener Row Spacing in the Panel and Screw Data sections. Install underlayment over OSB applications. Determine prevailing wind direction. Roofing panels should be installed beginning at the opposite end of the building from the prevailing wind direction. For proper lapping of roof panels and other trim details, see drawings in Panel Data and Trim Detail sections. The Trim Details in this guide refer to the 1.75 Thin Seam Panel. Trims for other concealed fastener panels will differ slightly in dimension to accommodate respective rib heights. 11

13 ORDER OF INSTALLTION 1) Eave or Drip Edge flashing 2) Underlayment 3) Valley or Prow flashing 4) Upper Skylight or Chimney flashing 5) Roofing Panels 6) Plumbing flashers 7) Gable Caps, Sidewall, Closure Strips, Headwall, and Ridge Cap 8) Sides and bottom flashing of Skylight or Chimney PANEL-SPECIFIC INSTALLATION NOTES 1 Snap Seam: Low-slope applications require sealant applied at seams. May not be end-lapped Thin Seam: Use bearing plates when installing over rigid insulation. May not be end-lapped. 2 Mechanical Seam: Use bearing plates when installing over rigid insulation. When installing less than full-length panels, end-lap each panel from eave to ridge before installing the next row of panels. Panels must be hand crimped at each clip and end-lap as they are installed to prevent their separation by a strong wind. Panels should be seamed with electric seaming tool as soon as possible after installation. 12

14 HOW TO SQUARE YOUR ROOF The best method to square up your roofing panels is the triangle method. A 3 x4 x5 triangle works in smaller roof areas. In larger areas, use multiples of 3 x4 x5 to increase the size of your triangle to more precisely square up longer panels. NOTE: ALWAYS SQUARE FOM THE EAVE 1) Measure in from the gable 1-3 and make a mark about 6 from the eave. 2) Measure 4 (or multiple of 4 ) farther into the roof from the gable and make a mark the same distance (6 ) up from the eave. 3) From the first mark, measure up the roof 3 (or same multiple of 3 that was used to make the 4 multiple) and make a small arc-shaped mark (about 4-6 long). 4) From the second mark made along the eave, measure 5 (or same multiple) diagonally back up towards the gable to the first arc, and make a second small intersecting arc. The intersection of the two arcs is the third point of the squared triangle. 5) Snap a chalk line up the vertical side of the triangle. This line will be parallel to the length of the roof panels and will help locate the first panel squarely with the EAVE of the roof. Subsequent vertical lines can be created from the first in order to keep the rest of the panels square with the eave. 13

15 VALLEY FLASHING 10" " 13 4 " 10" SEALANT IN RIB SEAMS #14X1" SCREWS EVERY 6" OR AS NEEDED 1.75" THIN SEAM PANEL #10X1" PAN HEAD SCREWS 2 PER CLIP THIN SEAM PANEL CLIP WATER PROOF UNDERLAYMENT SEALANT TAPE PLYWOOD 5 8" MINIMUM 14

16 EVE FLASHING 1.75" THIN SEAM PANEL SEALANT IN RIB SEAMS WATER PROOF UNDERLAYMENT #10X1" PAN HEAD SCREWS 2 PER CLIP THIN SEAM PANEL CLIP PLYWOOD 5 8" MINIMUM SEALANT TAPE #14X1" SCREWS EVERY 24" OR AS NEEDED " 2" 1 2 " 15

17 1.75" THIN SEAM PANEL RIDGE CAP " 41 4 " " " 1 2 " 1 2 " 1.75" THIN SEAM PANEL WATER PROOF UNDERLAYMENT #12X 3 4" SCREWS EVERY 24" OR AS NEEDED #10X1" PAN HEAD SCREWS 2 PER CLIP Z CLOSURE #14X1" SCREWS EVERY 24" OR AS NEEDED SEALANT THIN SEAM PANEL CLIP PLYWOOD 5 8" MINIMUM 16

18 1.75" THIN SEAM PANEL GABLE CAP 3" " " 4" 1.75" THIN SEAM PANEL WATER PROOF UNDERLAYMENT SEALANT PLYWOOD 5 8" MINIMUM #14X1" SCREWS EVERY 24" OR AS NEEDED 17

19 1.75" THIN SEAM PANEL HEADWALL " 6" #12X 3 4" SCREWS EVERY 24" OR AS NEEDED THIN SEAM PANEL CLIP 1.75" THIN SEAM PANEL #10X1" PAN HEAD SCREWS 2 PER CLIP SEALANT WATER PROOF UNDERLAYMENT PLYWOOD 5 8" MINIMUM #14X1" SCREWS EVERY 24" OR AS NEEDED 18

20 1.75" THIN SEAM PANEL SHED RIDGE 7" 4 5 8" 5 8 " THIN SEAM PANEL CLIP 1.75" THIN SEAM PANEL #10X1" PAN HEAD SCREWS 2 PER CLIP #12X 3 4" SCREWS EVERY 24" OR AS NEEDED SEALANT WATER PROOF UNDERLAYMENT PLYWOOD 5 8" MINIMUM #14X1" SCREWS EVERY 24" OR AS NEEDED 19

21 1.75" THIN SEAM PANEL SIDEWALL 3" 3 4 " " 2" #14X1" SCREWS EVERY 24" OR AS NEEDED SEALANT 1.75" THIN SEAM PANEL WATER PROOF UNDERLAYMENT PLYWOOD 5 8" MINIMUM 20

22 CHIMNEY & SKYLIGHT FLASHING Installation of a chimney or skylight requires layering flashing to provide a weather tight roof. The following steps illustrate one way to flash a chimney or skylight. Job site conditions may require alternate dimensions or installation techniques. Required Skylight Flashing: 1ea. backpan flashing 2ea. sidewall flashing 1ea. endwall flashing Sidewall Endwall Prior to trim installation, cut the roofing panels as close as possible to the left, right and downhill sides of the curb. Cut the uphill side panels 6" up from the curb. Do not fasten down the panels within 18" uphill from the skylight. Step #1 Install panels around chimney or skylight, leaving out panels above. Where the panels running into the skylight are deeper than needed, cut the panel opening 1" deeper than necessary (see Last Panel Termination Detail) and bend up creating false rib. Do not install panels directly above skylight. 21

23 Step #2 Install backpan flashing above skylight. When cutting to fit, leave a minimum of 4" to either side, wider than the skylight. Install panels above skylight, when cutting panels leave 6"-8"short of skylight. Apply sealant under panels where the panels lap the backpan flashing. Continue paneling past skylight. Trim to width of skylight plus 4" on each side 4" wider than skylight on both sides Step #3 Install endwall at the downhill side of the skylight. Cut the flashing to the width of the skylight plus 2" on each side (sidewall typically 2" wide). Then cut back along the bend 2" on each side and bend the metal around the curb. Bend metal around skylight curb 2" wider than skylight on both sides Cut back along bend 22

24 Step #4 Install sidewall flashing by cutting back the top leg a minimum of 2 and folding around front of curb. Do this for both sides of the skylight. 23