Where Do Screws Go On A Metal Roof

The screw can flex within this space reducing the shear load carrying capacity of the sheathing system.

Where do screws go on a metal roof. Metal roofs can be as much as two or three times more expensive than other roofing materials. Most manufacturers drill holes through the corrugated metal roofing sheets. These screws must be installed at the proper. Be sure the larger edge is laid so that the small edge of the next panel will overlap it.

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. As the screws are driven the washer presses against the metal roofing to form a water proof seal. These are where to screw down corrugated metal roofing. Today the fasteners of choice for corrugated roofing are gasketed hex head screws with a metal and rubber washer below the head.

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. The screws that are used to attach the metal roofing are self drilling screws. Therefore you do not need to pre drill the holes. 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.

Corrugated roof panels and other exposed fastener metal roofs are usually held together with screws every 18 inches or 2 feet. However you have to ensure the rubber washers have enough space to move around. You will want to note your metal roof screw pattern so you know where to look for potential problems. Install the roofing screws vertically along each rib in the panel.

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. This means that the screw will drill its own hole through the metal roofing panel and into the metal or wood substrate. Hidden screws exposed fastener installation is easier and less expensive.