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.
Where to put screws on metal roof.
The screws that are used to attach the metal roofing are self drilling screws.
However you have to ensure the rubber washers have enough space to move around.
Generally it is best to place each roofing screw about one and half to two feet apart but no more than that.
See the illustration below.
Make sure that you are not placing the roofing screws too close to each other or too far apart.
One item of importance is that you will have additional screws at the ends of the panels.
This lessens the likelihood of strong winds ripping the panels off of your building.
Hold the drill so that the length of the screw is.
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.
Install the roofing screws vertically along each rib in the panel.
Therefore you do not need to pre drill the holes.
Position the metal roofing into the desired location.
Absolute steel advises screws be installed down inside the flat of the panel and not in the top of the rib.
Most manufacturers drill holes through the corrugated metal roofing sheets.
The screws are located in the same location for both metal roofing and metal siding applications.
Hidden screw roofing is called standing seam.
If placed in the top of the rib the screw may also potentially tilt thus stretching the screw hole.
This is important as placing a screw in the top of the rib will prohibit a good seal.
Hidden screws are the proper way to screw down metal roofs.
These are where to screw down corrugated metal roofing.
The screw placement for r panel is straight forward.
Insert the head of a self tapping metal roofing screw into the bit on the end of the drill.