The fact that metal roofs are durable and require little to no maintenance usually makes them attractive for most homeowners. The fire-resistance and light-enough-not-to-compromise-roof-structure advantages only serve to make them irresistible. However, poor installation practices can erode these advantages and can cause the need for premature repairs. This can make having a metal roof not only frustrating, but also costly – especially if you end up with a leaking roof that exposes your property to water damage.

One of the things that most homeowners fail to provide for is the difference in expansion rates between the metallic roof and the wood strip that it is usually attached to. This then leads to fasteners backing out, metallic roof hole formation and loosening of joints. All this usually combines to make a roof that is vulnerable to moisture and which is in need of costly repairs.

Protecting your roof against expansion-caused damage is a hassle-free way of having a home with a good roof. Here are tips that will help you do so.

Use metallic purlins

A problem usually arises when the metal panels of a roof are directly attached to a solid plywood. When temperatures rise, the metal usually expands faster than the wood. The differences in speeds of expansion usually applies pressure on the fasteners holding them together. This usually causes the metal to tear and the holes created by the fasteners to expand. As a result of this, moisture can then enter the home and thus causing extensive property damage. Leaks can also cause rotting of the wooden roof structure, something that may then compromise its integrity.

To prevent this from happening, use metal purlins. Attaching the metal roof panels on the purlins usually allows room for expansion and contraction of the roof panels, something that then puts less stress on the fasteners and the roof panels. This prevents premature roof damage.

Use shorter metal roof panels

The effective increase in length of a long panel after expansion is usually more than that of a shorter. The net length loss after contraction in a longer panel is also more.

In areas that feature extreme weather changes, it is therefore advisable to use shorter metal roof panels since they put less stress on the roof during contraction and expansion. Breaking a long panel into two short ones is usually recommended.

Also, in cases where longer panels are used, painting them white will increase their reflective abilities. This will reduce the amount of heat that the panels absorb, something that will in turn reduce the amount of expansion it undergoes. It will thus reduce the extent of damage when the temperature rises. Contact a business, such as the Homestreet Roofing Inc, for more information.   

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