Can Roofing Bolts Be Repaired Or Replaced?

Roof bolts are integral parts of roofing your house or any building structure therefore, it is essential to get the right type of bolt while roofing your building. More often than not bolts get rusted or damaged in some way and then we wonder if they can be replaced or changed. Don't worry, we have asked several roofing experts and this is what they had to say.

It is very possible to replace or repair a roof bolt and affordable too. You can also hire a professional to do the job faster and more efficiently. In order to repair your roofing bolt, you would need a bolt tightener, and a claw hammer to keep you from falling if you slide down from the rooftop.’

To avoid repairing or replacing your roof bolt, we'll look at ways you can properly maintain them. Read on as we discuss these various points in detail.

Building contractor is installing metal roofing sheets, Can Roofing Bolts Be Repaired Or Replaced?

What Are Roofing Bolts?

Roofing bolts or screws, also called mushroom head bolts, have large flat heads, and threaded bodies, and are fitted with square or hex nuts. They are made with a large flat head because the wide head distributes the holding force more than normal bolts.

Nuts are used to tighten bolts to hold them securely to the sheet of metal. They are made of galvanized mild steel. Galvanized to prevent rust, so it can be used indoors or outdoors.

Roofing bolts come in various metric nut sizes or diameters. The most common sizes of roofing bolts are the M5, M6, and M8 with a thread diameter of 5mm, 6mm, and 8mmrespectively. The letter "M" in the size is the metric size and the number is the diameter.

The length of a roofing bolt is measured from under the head and ranges from 12mm to about 60mm depending on what you are using it for. 

When replacing roof bolts, it is important to know the length and size of bolts needed, as bolts larger than necessary can damage the roof and cause leaks, while bolts smaller than necessary will not be as solid, and they can leave at any time.

Roof bolts are very important for roofing structures or buildings because they are used to fix the roof of a building to prevent the roof from being blown away by strong winds. Roof bolts have other uses in fencing, wood framing, and some other construction projects.

Self Drilling screws for roofing with a drill and with sealing washer

Can Roofing Bolts Be Repaired or Replaced?

Roof bolts can be repaired or replaced whenever you notice a leak or think they need to be replaced. It is recommended that this be done by an expert as it can lead to roof leaks if the screws are installed incorrectly.

Self-tapping screws for fixing the roof with blue hex heads

If you end up doing it yourself, you'll need a few basic tools to get the job done.

  • Screw gun
  • Sealants
  • Roof bolts
  • Brush
  • Claw hammer

Roofs are sloppy and it is very easy to slide down. That's why you need a claw hammer to grab something in case you slip.

How Do You Repair a Roof Screw?

Homeowners often have to repair roof screws due to screw leaks. These screw leaks are usually caused by rust or improper installation. When installing new screws, it is best to hire a roofer to verify the problem and provide a lasting solution.

In most cases, the screws have come loose which can be fixed by re-inserting the screws into the ceiling tile. If the screws fail, it is better to replace them completely.

After tightening or replacing a screw, it's usually best to apply a sealant to the screw to protect it, seal it, and prevent water ingress.

How Do You Replace Metal Roof Screws?

Replacing metal roof screws can be done by following the easy steps highlighted below.

Removing the old screw

The first step in replacing roof screws is removing the old screws. This is done by using a screw gun to loosen the old screws.

Installing your new screw

When installing new screws, make sure they fit into the ceiling. It is also important to ensure that the screws are not tightened diagonally, but should rest vertically against the ceiling tile.

Some other things to consider when replacing roof screws are screw tightness, roof style, and the size of the washer used. All of these must be considered when replacing roof screws.

How Often Should You Replace The Screws on a Metal Roof?

Regular roof maintenance is essential to the longevity of the roof. In most cases, it is not necessary to completely replace the roof, and simply replacing old screws can save you a lot of money on a roof renovation.

Metal roofing screws should be replaced every 10-15 years, as during this time the screws may loosen or lose their grip on the metal roof due to wind action or rust. In addition to replacement, the roof should be regularly inspected for leaks.

How Much Does It Cost to Replace Screws on a Metal Roof?

The cost of replacing screws on a metal roof is influenced by so many factors, and these factors should be put into consideration when you are creating a budget to repair that roof. Some of those factors are listed below

Are you changing the screws in only one section or the entire structure?

It is important to note that just because your roof is leaking does not mean that you have to replace all the screws in your roof structure. If it is just a minor leakage, you may be able to find just the area of ​​the leak and repair those parts to save money.

Are you planning on fixing it yourself or paying someone to do it?

As said before, replacing a metal roof screw is not difficult, you can do it yourself. If you are doing it yourself, all you need to do is go to a store that sells building materials in your area and buy the bolts and nuts for fixing it, which can save you a lot of money.

Check out metal roofing screws on Amazon

Although getting someone to do it for you isn't a bad idea if you can't do it yourself. This will cost you more anyway.

Either way the cost of replacing the screw on a metal roof costs between $200 - $1000, depending on the factors listed above. So, if you are planning on replacing your roof screws you should probably add this to your budget.

Why Do Screws Back Out On a Metal Roof?

One of the main disadvantages of metal roofs is expansion and contraction. Metal roofs tend to get hot during the day when the sun is out and cools down at night.

Expansion and contraction lead to the loss of panels. As the roof heats up and cools down, the screws become less secure, so we may need to tighten the roof more often than necessary.

Do Metal Roofs Leak More Than Shingles?

Ashpalt roof shingles

Shingles are another type of building roofing material. They have individual overlapping elements and are placed gradually from the bottom of the roof, with the step above overlapping the joints of the step below.

Shingles are made from different materials ranging from plastic to metal shingles. It is vital to note that shingles of different materials serve different purposes.

Metal roofs are more durable than any other roofing material, including shingles. While roofs are more prone to leaks than shingles if installed incorrectly, metal roofs also have a longer lifespan than metal at 70 years, while shingles can last up to 30 at 50 years old. Metal roofs also have higher resistance to climate changes than shingles.

What Causes a Metal Roof To Leak?

Metal roofing is durable, safer, environmentally friendly, and most importantly, more expensive than other roofing materials. Hence, we often wonder what causes them to leak most of the time. Here are some reasons why they leak.

Missing Sealant

tools and materials for renovating a flat roof

When a sealant is not on the roof, the roof tends to leak. It is always a good idea to have the sealant in these areas inspected by a roofing professional and replaced as needed.

Different roofing materials have their own sealant, and you should take this into consideration when buying a sealant for your metal roof.

Finally, the choice of roof sealant to be used will be dependent on whether minor damage is to be repaired or an entire roof is to be sealed.


Metal tends to rust when they come in contact with water and oxygen. These rusts lead to leakage on the rooftop when left unattended. 

The problem of rusty roofs can be solved by applying oil-based paint to the roof to prevent the metal from reacting with rainwater.

Metal Roof Bolts

Metal roofs leak when bolts or screws are tampered with in any way. Misaligned screws can cause leaks. Overtightening and under-tightening can also cause roof leaks.

It is recommended to pay attention to these things when repairing or replacing screws in the ceiling for the first time.

To Wrap Up

Building contractor is installing metal roofing sheets

Roofs and roof bolts are very important in roofing and must be properly maintained. Periodic inspections should be performed to ensure there are no issues with the screws or any other roof components.

To read more about roofing, we recommend these engaging articles:

Can Roofing Nails Be Used For Vinyl Siding?

Should Roof Tiles Be Nailed Down?