How To Install Corrugated Metal Roof Over Shingles

Published Oct 26, 20
5 min read

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Corrugated roof panels are made from metal, fiberglass or polycarbonate and typically install over a system of purlins. They're popular for workshops, sheds, boathouses and other sheds due to their lasting durability and easy installation. The panels are available in basic widths and lengths and are attached utilizing screws with versatile washers.

Depending on the roofing item, a metal roofing system can last 40 years or more - how to install corrugated metal roofing on a flat roof. Metal roofing quickly sheds snow and ice and does not absorb water. It won't rot, split or crack, and can't be harmed by termites and pests. And, unlike any other kind of roof, the color of pre-painted metal roofing can be changed to match new outside color design.

One trick to separating panels from a package is to "whip" the panel to force air beneath it (so they do not stick). The lightweight of a corrugated metal panel is another benefit. Compared to asphalt shingles that weigh approximately 2. 5 pounds. per square foot, metal roofing panels just weigh.

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3 pounds per square foot, which allows the panels to be set up over existing roof materials. This saves pricey disposal and elimination charges, and makes the panels much easier to raise and set up. (Eventually, regional structure codes and the condition of your roofing system's foundation will identify if you can set up metal panels over your existing roofing system.) On this construction crew, one guy delivers the panels to the two installers on the roof.

This lessens heat retention so less heat is moved into the building. Fasten the panels with a 2" overhang. Plus, metal roofing is the favored roof choice in hail-prone areas. Hail triggers traditional roofing materials to break and divide. Hail will not permeate a metal roofing. In general, fall-restraint harnesses and security lines ought to be used by anyone dealing with roofing system.

Use versatile rubber shoes that grip the metal when stepping on it. Never set up metal roof in the rain, because the slick, wet surface of the panels can essentially ensure you'll slip and fall. And never ever deal with metal panels in high winds, since the wind can bring an unfastened panel air-borne, in which case it ends up being a big flying blade and really dangerous.

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Do not follow their lead!If you fall off a roofing and arrive at the ground, you might break your neck. Constantly use the suitable safety equipment. If the bundles of metal panels are stored outdoors on the ground, utilize plastic sheeting underneath the bundle to lessen condensation of water from the ground onto the panels - corrugated metal roof screw placement.

Shop the panels at an angle to promote drainage off the package. Safeguard the stored panels with a loose -fitting tarpaulin to secure from rain or snow however likewise allow air blood circulation. Tin snips, powered shears or an electrical nibbler tool are advised to cut the panels. Cutting the steel creates slivers and metal chips that should be removed to avoid scratching the painted finish.

You'll find it beneficial to have three set, for left edge, right edge and centerline cuts. To help determine the overhang, connect a design string parallel to the eave as a guide. A variable-speed cordless drill/driver is all you need to drive the screws. Recommended fastening pattern. For attaching the metal to wood framing, usage sharp-pointed, color-coated screws that quickly penetrate the metal to engage the wood.

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Hex-head screws assist hold the fasteners stable while driving them. All screws ought to include an EPDM vulcanized, bonded washer to avoid leakages and damage to the panels throughout setup. Side laps should deal with away from the dominating wind. If you're unable to utilize full panels on your roofing system, follow the setup sequence (left) for proper construction.

Whenever possible, nail in the valley between the ridges, where the roof is closest to the wood. The fasteners of option are color-coated screws with sharp points and EPDM vulcanized bonded washers to seal out water. For gable roofing systems, put the metal sheet at one corner of the roof, overhanging the edge by 2 inches.

Fasten with about 20 screws per sheet. Pursue the sides of the roofing system deck, cutting panels to fit as necessary. Location a second corrugated sheet next to the first with the ridge of the panel overlapping. For a more safe and secure roofing, use caulk/sealant between the 2 overlapping sheets. Screw the second sheet through the first and into the framing.

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This team builds a lot hip roofs to a typical pitch, and they made a wood jig to assist the matching panel's cuts. For the second row, position the very first sheet above the very first sheet of the very first row. The upper sheet must overlap the first by 6 inches. Secure the sheet and complete the second row in the same way as the first.