Metal has become a popular roofing solution in recent years due to its durability, longevity, modern appearance, and better resistance to natural elements; however, the installation process is a different issue and is usually riddled with mistakes, primarily when handled by inexperienced people. Unfortunately, these errors can damage your roof, call for reinstallation, and cost you much more money. If you’re considering this project soon, here are some metal roof installation mistakes you should avoid:
Failure to adequately prepare the roof surface
Proper roof preparation is one of the most critical aspects of a metal roof installation. Failure to do this can cause poor adhesion, compromising structure. Before you install your metal roof, ensure the roof deck is clean, dry, and debris-free. This may mean removing old shingles, nails, and other materials that may interfere with the process. Next, install proper underlayment as a moisture barrier and thermal insulation.
Using incorrect screw fasteners
Using non-standard screw fasteners when installing your metal roof can lead to leakage. Water can seep through the panels with little to no resistance. Over time, this will cause rots, corrosion, rust, and even fungus growth, and weakening the roof. On the other hand, the proper fasteners will seal the opening through a washer to keep the water out.
Installing a metal roof over shingles without an underlayment
Many people conveniently install their new metal roofs over their existing shingles. While the metal roof is supposed to be weather-resistant, this installation mistake can only do a lot of damage if you add an underlayment. This is because the underside of most metal roofs is protected by a primer that will wear down as the roof expands and contracts against the shingles. Once the primer wears away, rust may start appearing because of moisture.
Lack of expansion and contraction consideration
Metal roofs expand and contract as the temperature fluctuates. Failing to prepare for this movement during the installation process can lead to stress on the panels, and this can cause them to buckle, warp, or even separate over time. Experts always advise leaving enough space for thermal expansion and contraction when installing metal roof panels. You can achieve this by using the proper panel clips or fastening systems designed to allow for movement without compromising the integrity of the installation.
Incorrect measurement is the easiest way to make metal roof installation mistakes and attract more expenses. In addition, the wrong measurements mean you’ll likely order panels not the right size for your roof. As a result, the metal panels may not align properly, resulting in gaps, overlaps, and edges. To avoid this mistake, take the time to measure your roof correctly. Accurate measurements are crucial to ensuring precision and securing your metal roof. If you’re unsure how to do so, contact a roofing specialist. Through their experience, they can offer enough information to help you make an informed decision.