Where Should Screws Be Installed In Metal Roofing

Absolute steel advises screws be installed down inside the flat of the panel and not in the top of the rib.

Where should screws be installed in metal roofing.

However you have to ensure the rubber washers have enough space to move around. The main cause of a leaking roof on a diy metal roofing installation is incorrectly fastening the screws. This can potentially cause damage in the future. Be sure the larger edge is laid so that the small edge of the next panel will overlap it.

These screws must be installed at the proper. 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. Find roofing screws with either manufactured rubber caps or washers that will create a proper seal. If placed in the top of the rib the screw may also potentially tilt thus stretching the screw hole.

As the screws are driven the washer presses against the metal roofing to form a water proof seal. Install the roofing screws vertically along each rib in the panel. The screw will compress better when attached in the low and you are less likely to distort the metal roofing panel when you tighten the screw. Screws that are installed in the low of the metal roofing panel will result in a more secure connection but will be less weather tight.

This is important as placing a screw in the top of the rib will prohibit a good seal. This will prevent any possibility of rust or erosion. Your roof will have thousands of screw holes. These are where to screw down corrugated metal roofing.

See the illustration below. Today the fasteners of choice for corrugated roofing are gasketed hex head screws with a metal and rubber washer below the head. Working with metal siding and roofing will often create gaps when the screws are inserted into the metal. Quite often the screws are over tightened or under tightened and when this happens it creates leak points.

Most manufacturers drill holes through the corrugated metal roofing sheets.