Aluminum roofing panels are lightweight and corrosion-resistant, making them a popular choice for homeowners. However, one common issue is fastener back-out, where the screws or nails securing the panels start to loosen and rise above the surface. This can happen due to several factors including thermal expansion and contraction of aluminum, vibrations from wind or mechanical sources, or improper installation such as not using the right type of fastener or failing to apply proper torque during installation. Over time, the metal around the fastener hole can deform or the fastener’s rubber washer can degrade, allowing the fastener to work its way loose. To check for this problem safely yourself, look for raised fasteners, rust around fastener heads (even though aluminum itself doesn’t rust, the fasteners might), or panels that seem to shift when you gently press on them outside. Avoid walking directly on the roof panels and use binoculars for a visual inspection from the ground or a ladder.
If you notice any signs of fastener back-out, it’s a good idea to contact a roofing professional who can assess whether the fasteners need tightening, replacing, or if the panels require further repairs. When talking to your contractor, ask if they use the correct stainless steel or aluminum-coated fasteners that match the roofing material to prevent galvanic corrosion, and how they ensure fastener longevity during installation. Discuss whether they will inspect for underlying panel damage since fastener back-out can sometimes indicate issues with the roof decking or insulation. Lastly, confirm if their repair method complies with the roof’s warranty terms because DIY fixes not up to code can void manufacturer warranties. Simple maintenance like checking fastener tightness is key to extending the life of an aluminum roof.