Metal Roofing Screws: All You Need to Know

There are a number of questions that often get asked about metal roof screws. Here are a few answers that may be of help.

How long do metal roof screw last?

Metal roof screws will last a long time, however, it’s the rubber seals around the head of the screw that will deteriorate first.

The quality of the rubber and the climate of where it’s being used will impact how long it lasts, then generally I would be checking the seals around 10 years after the installation. Once this rubber seal is broken up the roof screw should be replaced.

Rusted roof screws

The above photo is a prime example of a rubber seal that has broken and will need replacing.

Why have some of my roof screws backed out?

Sometimes, consistent movement of the metal sheets or roofing structure can cause metal roofing screws to back out of the hole. If this occurs, the best cause of action is to impact the rubber and if all is okay drill the screw back down or if not replace the screw. If the screw hole has widened or the screw is loose then best to replace it with a longer screw to ensure a firm grip.

How do you replace metal roof screws?

If you need to replace the screws on your metal roof then the first thing you need to do is examine your roof to identify the number of screws that need replacing along with the type of screw that you’ll need.

9/10 screws used in Australia are of the hex head type with the size and length varying. With this in mind, the ideal tool to use to remove and replace the screw is an impact drill with hex head socket, or commonly known as a ‘tek screw bit’.

Hex head socket in 12V drill

Once you’ve got an idea of how many screws you need to replace, along with the type (I usually take one out of the roof so I have it as a reference) you can then head to your closest roofing supplier to purchase the screws you need.

Once you have the screws, drill, and appropriate drill bits then it’s time to get to it. When replacing screws I always like to take a tool belt with two decent pouches on it – one to hold the new screws and one to store the old ones.

I then simply follow the screw line looking for the screw to replace.

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