Metal roofing is popular because of its durability and ability to reflect away the sun’s heat. Just as with other roofing materials, metal roofing can also get leaks if not properly maintained. Many believe that if properly installed, metal roofing does not need sealants, but perfection is hard to achieve.

Metal Roof Leak Protection

At some point, your metal roof will leak, and this can be challenging. Metal roofing has a high coefficient of expansion, which means that it moves more significantly with temperature changes than other materials. These roofs also have additional features such as flashing that often moves in different directions, and mechanical seamers that can become unadjusted, creating additional challenges. The good news is that there are products that can help resolve these problems quickly. Two products, in particular, to help with metal roof leaks are sealants and tapes.

Sealants and Tapes

A sealant is designed to help close gaps created by fastener heads and other penetrations. Most roofing has fasteners that eventually become loose, leaving a gap in the roof surface. To repair this and prevent a leak, remove the screw, place a new washer and fastener, and then cover with a sealant. High-solids polyether or silicone sealant works best for metal roofing. These sealants are often pigmented to match the coloring of the roof to blend and create a strong seal. These materials are also both UV stable, have excellent weathering, and have strong adhesion to all types of metal. For higher temperatures or climates, silicone works best

Roof tapes are also effective and an efficient solution for metal roof leaks. You will want to use a high-quality, watertight roof tape with 30mm thickness. It is easy to install, with one worker holding the edge of a tape roll and another worker walking the roll along the seam. Pull the backing off the tape as you go. You also want to make sure you have tape with a polyester scrim as this is the most flexible and can make different shapes or turns if needed. Before you tape any surface, you need to brush it to remove any dirt or oil that may have collected from the air. Use rubbing alcohol to remove any residue that may be stuck. Set the tape with a roller once it is in the desired place and as you apply pressure, the adhesive is activated for a secure hold. The final step is to check for any voids and then apply a coating.


Tape is great for gutters too, especially in corners where the gutter may not be cut to the precise length or when the joint is too big. After cleaning out the gutter, the procedure for applying tape is the same as above. When taping a gutter you want a thicker tape, rather than a flexible one, so you don’t have to worry about using a coat afterward. Sealants are preferred because they can match the roof color, but most roof tapes can be painted over. This way it can match the roofing and blend in. When it comes to leaks in metal roofs, sealants and tape can help you out. Reach out to us today to make sure your metal roof is sealed or taped up for the best protection from leaks.


Do you need a reliable roofer?