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METAL ROOF: 9 THINGS TO KNOW

METAL ROOFA metal roof is vulnerable to rust if the protective surface is compromised, so do not let your tools scratch the sheet.

Oxidation

If you use more than one type of metal on your roof, put those that are most prone to oxidation (the less “noble” metals) above those that are least prone to oxidation (metals more “noble”). The ideal order of metals (from top to bottom) is zinc, aluminum, iron and steel, lead, copper and then stainless steel.

Your weight can permanently dent or wrap the light metal used on most home roofs. If you walk on a metal roof to cross it, follow the line of fixings, where the roof has maximum support. Plates with a high profile do not dent as easily as those with a lower profile, but still follow the fixings.

Noise

The sound of a light rain falling on a metal roof can be nice, but a deluge is deafening. If you are installing a new roof, install an insulating fiberglass blanket or similar material underneath. This will dampen the noise, reduce condensation in the roof space and also provide thermal insulation.

When a roof rust to the point where holes begin to appear, it’s time to replace everything. If you need a temporary solution, try filling the holes with putty or covering them with snap rivet pieces; but make replacement a priority.

Temperature

Temperature changes force the sheet to expand and contract, resulting in creaks and squeaks. Aluminum and zinc expand twice as much as steel, so they tend to be the loudest roofs.

Constant expansion and contraction of roof panels can loosen screws and nails. Check regularly, and tighten screws and nails as soon as you spot them.

Many sheet metal roofs are installed at a shallow angle.  So there is always the risk that rainwater may flow back underneath due to surface tension. Lowering your edge of the plate where it flows into the gutter. It can reduce the risk of leaks in your roof space.

The lead washers that are sometimes used under galvanized roof screws can take the form of a cut over time, allowing water to flow underneath directly into the roof. To solve the problem, apply a small amount of sealant on the underside of the washers concerned. Otherwise, replace the washers.

Keep these nine things in mind when planning to install or repair a tin roof, and you’ll be better able to keep it going.

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