Specification Manual
Never Re-Roof Again.®
Specifications and installation manual for Interlock® Standing Seam aluminum roofing — mechanically locked panels, profiles, and code data for specifiers.
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This document is part of the roofbook.com library — the official, primary-source document library for Interlock metal roofing. It is published by Interlock Metal Roofing Systems. Learn more at https://www.interlockroofing.com.
Interlock® Standing Seam is a vertical-run aluminum panel roof finished with the Alunar® Coating System. Panels are roll-formed with a ribbed contour for added strength, are 17" (43.2 cm) wide with a 1" seam height, and are manufactured to length in continuous form up to a maximum of 26 feet. Each panel is clipped and fastened, then the next panel is overlapped and securely lock-formed in place.
Yes — it can be installed on new construction or applied over existing roofs, and a leveling underlayment may be used to reduce surface imperfections. The minimum slope is 3:12 when installed with an Ice & Water underlayment, or 4:12 minimum with standard underlayment, over 1/2" minimum sheathing or tightly fitting boards covered with synthetic roofing underlayment.
The system is available with a Non-combustible "Class A" fire rating, and it meets UL Standard 2218 Class 4, the impact standard for impact (hail) resistance. The gauge-0.028" aluminum panels also resist cracking and splitting and are wind- and weather-resistant. These ratings make it suitable for fire-prone and hail-prone regions.
Beyond standard panels, Standing Seam offers Curved and Tapered specialty panels for custom roofing features such as turrets, radius eaves and conical forms. A two-piece ridge cap with vented closure, valley trim manufactured in 10' lengths (with wider valleys available for high-snow areas), and chimney/skylight collar details complete the system.
The manual states that it is the responsibility of architects, builders and roof installers to ensure that all construction bylaws and building codes are adhered to. Interlock supplies the panels, clips, fasteners and matched trims, while the design professional confirms wind-load and code requirements for the specific project and region.
The manual cites a Lifetime Limited Warranty, energy efficiency, curb appeal, weather and wind resistance, low maintenance, lightweight construction, superior strength and durability, the Alunar® Coating System, no cracking or splitting, and a full interlocking connection system. Its light weight requires no special structural preparation, reducing structural cost.
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Interlock® Standing Seam Specification Manual NTER loCk Lifetime Roofing Systems®
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1 Description Interlock® Metal Roofing Our standing seam roofing can be installed on new construction or applied over existing roofs. All trims and caps are designed to ensure an integrated weather-resistant roof. Runs are vertical, manufactured to length in continuious form to a maximum length of 26’. It is the responsibility of architects, builders and roof installers to ensure that all construction bylaws and building codes are adhered to. 26’ Maximum Length 1” Seam Height 17” (43.2 cm) Panel width Leveling Underlayment Underlayment Standing Seam Lock with clip Roof Surface 1/2” Sheathing Sliding clip Fixed clip Gauge of material 0.028” (.71 mm) Aluminum base coated with:
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2 Description Interlock® Standing Seam Like all of our products, our Standing Seam is coated with the Alunar® Coating System to provide an extremely durable and attractive surface. The panels are roll formed with a ribbed contour to give added strength. Panels are clipped and fastened in place with the next panel overlapped and securely lock-formed in place. Roof Slope Minimum 3:12 when installed with an ice & water underlayment or 4:12 minimum with standard underlayment. Interlock Standing Seam has many advantages when compared to other roofing products. • Lifetime Limited Warranty • Energy efficient • Curbside appeal • Weather and wind resistant • Low maintenance • Available in many designer colors • Lightweight • Superior strength / Durability • Alunar® Coating System • Non-combustible “Class A” Fire Rated available • No cracking or splitting • Full interlocking connection system • Hail Resistance; Meets UL Standard 2218 Class 4, Impact Standard for Impact Resistance Weight Our Standing Seam weighs considerably less than most other types of roofing systems. No special prepara- tion is needed, resulting in less structural cost. Application Leveling underlayment may be used to reduce surface imperfections. Panels are clipped and fastened with screws with the next panel being lock-formed in place. Sheathing Sheathing for the roof should be 1/2” minimum or tightly fitting boards. Underlayment The entire roof area should be covered (prior to panel applica- tion) with synthetic roofing underlayment. Underlayment Leveling Underlayment Sheathing Standing Seam Panel Clip Starter Trim
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3 Components Starter Strip The manufacturing characteristics of the Starter Strip provides a water barrier which prevents water back-up. Specialty Panels New options available for Standing Seam are Curved and Tapered panels for custom roofing features. 1/2” 3/8” 4 5/8” 2 1” 1/2” Tapered Curved 1/8” Starter Strip Profile
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4 Components Gable End An inner gable is installed and a gable end trim is then applied over top to form a protective cap. Chimney/ Skylight Collar Provides a weather-tight seal around chimneys. Roof panels are secured around the chimney and a collar is cut into the brick and mortar, covering the roof panels. Endwall 1/2” 1” 1/2” 2 4” Backpan 5” 4” Collar 1/2” 3/8” 8” 1” Sidewall 1/2” 1/2” 4” 1” 2 3/8” 14” Inner Gable Standing Seam Panel 2” 3¼” Standing Seam Panel Gable End Trim
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5 Components Valley Trim Provides smooth, obstruction-free path for precipitation. Roof panels are trimmed and folded inside the locking joint to form a solid weather-proof unit. This specially designed trim is manufactured in 10’ lengths. Wider valleys may be used in areas with high levels of snow. Two Piece Ridge Cap Leveling Underlayment Underlayment Sheathing 1/2” Minimum Drag-Load Fastener Vented Closure Bread Panned Panel Standing Seam Panel Stitch Screw 30° 1” 1” 1” 4” 6”
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6 Application Sheathing: 1/2” Sidewall Flashing Endwall Roof Panels Starter Strip Underlayment Leveling Underlayment 2 Piece Gable Trim Two Piece Ridge Cap Valley Trim
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Color Guide Interlock Roofing Ltd. offers a highly durable aluminum roofing product available in a range of different colors, opening up an extensive palette for homeowners and designers. Interlock® roofs are exclusively protected for a lifetime by the Alunar® Coating System. Color and availability may change without notice. Product design and installation technique may vary from represented shown on manual. Installation methods may vary by structure, region, climate, and local building codes. Certain variables and factors specific to your home may inhibit the product’s ability to shed snow. Roofing products and components may change without notice. Please see our website for more information. Copper Penny Hunter Green Solid Copper Deep Charcoal Musket Grey Black Colonial Brown Tudor Brown Tile Red Interlock Roofing Ltd. 9969 River Way Delta, BC V4G 1M8 1-866-766-3388 www.InterlockRoofing.com © 2022 The Interlock Group. Interlock®, Interlock Lifetime Roofing Systems®, Alunar®, Never Re-Roof Again.®, and Arrow sign are registered trademarks of I.E.L. Manufacturing Ltd. and are used under license. SP20220308