Where Should Screws Be Installed In Metal Roofing

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

Where should screws be installed in metal roofing.

These are where to screw down corrugated metal roofing. Most manufacturers drill holes through the corrugated metal roofing sheets. 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. The main cause of a leaking roof on a diy metal roofing installation is incorrectly fastening the screws.

Be sure the larger edge is laid so that the small edge of the next panel will overlap it. You will want to note your metal roof screw pattern so you know where to look for potential problems. This is important as placing a screw in the top of the rib will prohibit a good seal. Find roofing screws with either manufactured rubber caps or washers that will create a proper seal.

Today the fasteners of choice for corrugated roofing are gasketed hex head screws with a metal and rubber washer below the head. Quite often the screws are over tightened or under tightened and when this happens it creates leak points. This will prevent any possibility of rust or erosion. 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.

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. These screws must be installed at the proper. Your roof will have thousands of screw holes.

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. See the illustration below. Install the roofing screws vertically along each rib in the panel. Absolute steel advises screws be installed down inside the flat of the panel and not in the top of the rib.

Corrugated roof panels and other exposed fastener metal roofs are usually held together with screws every 18 inches or 2 feet.