Should Roofing Underlayments Be Used in Metal Roofing?

09 March 2017

Roofing underlayments are aspect of roofing that not everybody hears about often. These typically are hardly mentioned accessories that are often absent in most modern roofing varieties, mainly due to the fact that galvanized sheet roofing is commonly riveted or ‘nailed’ in place, and installations that lack their use result in sub-standard roofing.

Old-fashioned roofing, whether it be shingles or metal, require some variety of underlayment in order to be set in place properly. In a nutshell, all roofing underlayments are nothing more than a membrane that is applied to the deck of a roof, which allows whatever roofing material of choice (tiles, shingles, or metal plates) to adhere to the roof properly.

Underlayment fulfills several roles, not only does it provide a flush and even surface for roof application, but the materials employed for underlayments also ensures that the roofing material adheres to the deck properly. Not only does this bolster the structural integrity of the roof, but the specialised coatings employed for underlayments likewise acts as an additional layer of protection against water-damage.

Traditionally, asphalt-saturated felt underlayments were the material of choice for both shingles on steep-slopes as well as for flat-out metal roofing, due to its ability to provide a superior even surface, as well as its long-lasting properties. Plastic sheet underlayments, often made of polyethylene, polyolefin, or polypropylene is, however, superior to the more traditional asphalt-saturated felt, chiefly due to its added hardiness and wind-resistant properties. Like felt underlayments, it too lies perfectly flat.

If you are wondering if roofing underlayments should be used with your metal roof; underlayments are a must because they provide several key factors to your roof:

Added structural integrity – not only do underlayments guarantee that metal roofs lay flat and flush against what could very well be an uneven surface, they also provide the added benefit of a ‘seal’ – guaranteeing that there are no crevasses or nooks where moisture may pool and cause damage in the long run. They also provide an extra buffering layer between your roofing material and the deck of the roof, thereby increasing the overall lifespan of both.

Added aesthetics – uneven roofing is an absolute eyesore. Keeping metal sheeting as evenly laid out and as flat as possible provides that added touch of sophistication, finesse and perfection that epitomises ‘good’ roofing, regardless of the type of roofing material used.

Extra ventilation – a little added ventilation by using underlayments will help make sure that your roofing deck remains dry and well-aerated, which is a good thing, and, this also helps provide and additional layer of protection – a barrier against rot and mildew.

If you’re looking for a proven roofing company that provides expert roofing underlayment installation, repair, and maintenance of metal roofing, then you will find ‘all’ you need at All Safe Roofing. We are dedicated to providing reliable, high-quality, timely, and efficient roofing services in Sydney.

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