Aside from your metal roof, its fasteners make sure your entire roof system is free of leaks, can withstand regular wind speeds, and ensure it is working as properly as possible. Unfortunately, exposed roof fasteners can wear out and fail to prevent moisture from entering your interior ceilings. Fortunately, you can replace metal roof fasteners by yourself. You won’t need too many tools to do it — a regular roof screw or screw bit on a hand-operated drill is enough.
However, there are a few things you should keep in mind when replacing your exposed metal roof screws. Roof Things has a comprehensive list on what you should remember when choosing roof screws and replacing them. Learn more here.
Metal fasteners are used when installing…
- A new metal roof on a residential home, business or commercial building
- A post-frame or pre-engineered steel building for an equestrian, agricultural, farm animal or product storage facility
- Garage for an RV, boat or farm equipment
- And more…
“The fasteners you choose are just as important as the decision you made to reap the benefits of building with metal. A quality fastener ensures benefits like energy efficiency, lowering homeowner’s insurance and the long life associated with metal construction.
“Matching the correct fastener to your job become vital to the success of your business. Here is our top 10 list of what to look for when buying metal roof fasteners:”
Use the right fastener. Screws and fasteners have metal-to-wood and metal-to-metal applications.
Use a fastener that has a large washer.
Hi-Lo threaded screws are used in metal-to-wood applications. (Tek screws are used in metal-to-metal applications. Stainless steel screws should be used when screwing down aluminum metal roofs. )
Protect against corrosion and rust by using mechanically galvanized fasteners.
Variety and choice matter.
Instead of carbon steel screws use stainless steel or zinc aluminum cap screws.
Look for and use fasteners with a strong V-neck head to prevent product breakage while on the job site.
Coordinate color of roofing screw with roof panel color.
- If you needed the screws yesterday look for quick ship options.
- Use fasteners from a reliable company. (Continued)
In addition to Roof Things’ helpful insight, MBCI‘s official guide on mechanical fasteners (aka exposed metal roof fasteners) is also worth looking at. This list is great especially if you’re not certain about the type of fasteners your roof uses or if you need extra-featured screws to ensure your metal roof can contract or expand safely. Read more here.
Before selecting fasteners for the project, it is important for the designer or installer to understand the various materials and options available. Typically, this involves the following considerations:
- What type of material and coating is appropriate?
- What type of head do I need? Does it need to be painted?
- Do I need a washer? If so, what material should I use?
- Should I use self-tapping or self-drilling screws?
- What thread count should I specify?
- How long does the fastener need to be?
- Many Types of Fasteners
The MCA provides a summary of the different types of fasteners in their technical bulletin, Fastener Compatibility with Profiled Metal Roof and Wall Panels.
Select a Fastener on the Basis of Material
Most fasteners are made from coated metal but both the type of metal and coating must be chosen on the basis of the materials the fastener is bringing together. Galvanic action between dissimilar metals can cause premature fastener failure and lead to leakage. Even stainless steel screws will corrode severely under the right (or actually wrong) conditions. In extreme exposure, sometimes the best option is to use galvanized screws and plan on replacing them at a later date with a larger screw once the zinc has been depleted.
Considerations for Self-Drilling Screws
Self-drilling screws have a drill bit built in and don’t require a pre-drilled hole. Although self-drillers save the installer the step of drilling a hole, they are not always a good idea. The available space between the back of the hole and the next physical restriction must be at least as big as the bit itself or the threads will not engage. Also, drilling a hole allows a quick inspection to ensure the hole is in the correct location and plies are aligned and parallel. Generally, self-drillers are used when going through thin gauge steel into thicker gauge steel and self-tappers are used when fastening two thin gauge plies. (Continued)
Lastly, if you can’t do it yourself due to time and skill constraints, you can always have professional roofers in London ON such as Cub Roofing to help you in all your project needs. Just contact us today to learn more about all that we can do for you.