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.

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

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. 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. 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.

This can potentially cause damage in the future. These are where to screw down corrugated metal roofing. If placed in the top of the rib the screw may also potentially tilt thus stretching the screw hole. Working with metal siding and roofing will often create gaps when the screws are inserted into the metal.

This will prevent any possibility of rust or erosion. 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. Corrugated roof panels and other exposed fastener metal roofs are usually held together with screws every 18 inches or 2 feet. See the illustration below.

As the screws are driven the washer presses against the metal roofing to form a water proof seal. This is important as placing a screw in the top of the rib will prohibit a good seal. 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. Your roof will have thousands of screw holes.

You will want to note your metal roof screw pattern so you know where to look for potential problems.