Metal panels and shingles make an attractive and highly durable roofing option. They are a popular choice for both homes and some commercial buildings. Yet metal may experience certain problems if the roofers do not install it properly. As simple as it may seem to apply, metal panels must be carefully installed by experienced metal roofer services to avoid five common mistakes that negatively affect these roofs.
1. Improperly Set Screws
The most common mistake made by roofers when installing metal panels is setting the screws incorrectly. Per manufacturer directions, the screws need to be put in just tight enough without being set too tightly, which could damage the washers. When they are set too loosely, the panels can move around. Both instances can result in leaks and substantial wind damage if the panels are loose. This is one of the main reasons why it is so important to work with metal roofer services that have experience installing this material.
2. Improper Overhang Length
Another common mistake of inexperienced roofers is making the overhang too short or too long. Metal panels should always overhang evenly by one to two inches to offer the best protection for everything underneath. If they hang over longer, drainage problems may result. If they do not hang over at all, water rolling off the roof can seep under the edges and be absorbed by the underlayment and decking.
3. Improper Flashing Attachment
Flashing is just as important on metal roofs as it is on any other type of building tops. This flashing is often poorly applied so the metal lips do not overlap properly or the flashing is not securely affixed. Installing flashing on metal roofs can be challenging. To get it right, these protective strips need to be properly overlapped and screwed down so they prevent water from getting under the seams yet stay secure in the wind.
4. Improper Attachment and Sealing of Pipe Flashing
In addition to improper overlapping of regular flashing, metal installations require that extra attention be paid to the flashing set around pipe vents and other protrusions. Many lesser-experienced metal roofer services may attempt to seal these areas with some kind of adhesive or roof sealant, which is incorrect. Flashing around pipes must be carefully fitted and screwed down onto the panels to create a watertight covering.
5. Improper Use of Sealants
Metal panels must be trimmed, placed, and overlapped correctly for them to be watertight. Sealant should be used sparingly to close up small openings rather than as a main means of closing gaps caused by improper trimming or overlay. Contractors who are less experienced with these installations may resort to the overuse of adhesives and sealants to close off openings caused by improper panel placement. This leaves the entire roof at risk for leaks and increases the chance that poorly overlaid panels will shift over time.
Before contracting roofers to apply metal panels or shingles, home and building owners should make sure their contractor is an expert in this type of installation. Experienced metal roofer services understand the many challenges of installing this material and know how to avoid the most common and significant mistakes. For the best installation of a metal roof, always work with a well-qualified contractor!
