Where Do Screws Go On A Metal Roof

However you have to ensure the rubber washers have enough space to move around.

Where do screws go on a metal roof.

The screws that are used to attach the metal roofing are self drilling screws. Hidden screws are the proper way to screw down metal roofs. Metal roofing installation requires special metal roof screws that are equipped with a metal washer with a neoprene seat on the base of the washer. Install the roofing screws vertically along each rib in the panel.

Hidden screws exposed fastener installation is easier and less expensive. As the screws are driven the washer presses against the metal roofing to form a water proof seal. Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line. While the life of a metal roof is much longer investing in a metal roof only makes sense if you plan to stay in your home long enough to enjoy the cost benefits.

Metal roofs can be as much as two or three times more expensive than other roofing materials. However when screws are exposed to the weather in central texas they can rust and the washers can crack leading to leaks that can damage not only the roofing but also the structure of the building. Therefore you do not need to pre drill the holes. Corrugated roof panels and other exposed fastener metal roofs are usually held together with screws every 18 inches or 2 feet.

This means that the screw will drill its own hole through the metal roofing panel and into the metal or wood substrate. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. When screws are placed through the high ribs there is a 5 8 to inch gap between the underside of the high rib and the framing below. Most manufacturers drill holes through the corrugated metal roofing sheets.

You will want to note your metal roof screw pattern so you know where to look for potential problems. Today the fasteners of choice for corrugated roofing are gasketed hex head screws with a metal and rubber washer below the head. The screw can flex within this space reducing the shear load carrying capacity of the sheathing system.