Frequently Asked Questions (FAQs)
Metal roofing seems to have a lot of options; how can I sort my way through everything?
We will work closely with you to choose the best roof for the purpose. One of the great things about metal roofing is the wide variety of products available. Our team is here to assist you!
Are all metal-coated or pre-painted steel sheets of the same quality?
The world’s most modern and widely used steel coating incorporates a mix of zinc and aluminium which work in harmony to provide optimal coating protection for the steel core.
Why use factory pre-painted metal roofing?
Factory pre-painted metal roofing retains its good looks and durability for decades, because it is manufactured under factory controlled conditions providing high quality finishes which are self-cleaning in the rain, antibacterial and antifungal, and have high thermal reflectance for better interior comfort.
What type of fastener (screw) should be used?
For optimal performance, the service life warranty of your fasteners must match the service life warranty of the sheeting being used. Aluminium roof sheeting: use ONLY stainless steel fasteners.
Must metal flashings be used or would waterproofing be sufficient?
Despite the advances in modern day external waterproofing products, the harmful rays of the sun will eventually play havoc with their efficacy. These types of products, albeit very effective, should ideally be protected from prolonged exposure to the sun, so a metal flashing becomes the obvious solution.
Is metal roofing noisier than other roofing?
The “clicking” of a metal roof is mostly due to thermal expansion and contraction, and is difficult to silence without insulation. When installed with a quality insulation, you can also silence the noise from rain, hail and bad weather as well – if not better – than that of any other roofing material.
Is a metal roof heavy?
A metal roof is, on average, 75% lighter than concrete tile and slate. This, coupled with the format of a sheet, and its high strength to weight ratio, means that even the substructure can be much lighter, using far less purlins / battens than a clay tile roof.
Can one walk on a metal roof?
Yes. And metal roofs don’t lose their strength over time, making them as safe as when they are new. For heavy foot traffic we recommend walkways are installed over the roof – ask us for advice in advance of installation.
What can I do to protect cut edges of metal sheets?
Cut edges and other areas where the base metal is exposed are protected by the coating. Due to a phenomenon called galvanic action, which is triggered when moisture is present, the coating sacrifices itself by offering itself for corrosion instead of the steel base. The use of clean paraffin may be applied carefully to the cut edge to further hinder corrosion.
What should be done if the paint gets scratched?
Should the scratch or scuff marking be superficial it would be best left untouched. With deep scratches where the protective aluminium-zinc metal coating has been penetrated, replacement of the affected roof sheets should be considered.
Where do I find a reputable contractor / can I install the product myself?
We have a panel of approved installers that specialise in sheet metal roofing installations. Many will also offer you an installation warranty which gives you peace of mind.
What maintenance does a metal roof require?
Although metal roofing in itself is well protected from the elements, preventative maintenance is required to ensure optimal performance. This includes periodic inspections of the roof as well as regular washing down of pre-painted roofing with a hose pipe and plain water. Do not use hard brushes that will scratch the surface.
How long does it take for the colour on the Supa-Roof material to fade?
It is largely dependent on the UV exposure per area. Typically lighter colours have a gloss retention of more than 50% after 10 years exposure, and darker colours have greater than 60% gloss retention over the same period.
Why do our roof sheets come in different colours and what is the difference in gauge when compared with other suppliers?
The various colours all adds to the aesthetic appeal of the house, and gives the homeowner a variety of choice for that individual touch. There is no difference in cost between the standard colour range. The Supa Tile / Versatile product comes standard in a 0.5mm commercial grade thickness, which makes for an economical alternative to the 0.58mm of conventional coatings.
What material is used in your roof sheets, is it galvanised?
Versatile / Supa-Tile is produced from aluminium-zinc technology. The coating has a 55% aluminium, 43% zinc and 1.5% silicon content, which greatly enhances the coatings’ performance when compared to conventional zinc. Continuous research and development and modern coating technology also make the product a cost-effective solution when compared to older technology used on conventional coatings.
Why don't you supply heavy tiles to compare with Supa-Tile or Versatile?
Supa-Tile / Versatile is manufactured from lightweight steel, and allows for greater ease of handling and less transport risks, which directly impacts the cost of the product when compared to clay tiles.
Why should I use screws and not nails; what happens when I use 75mm long nails?
Simply put, screws with tested thread counts per inch suitable for timber construction will have much better hold-down capability. Tests have proven that 75mm wire nails have a much lower pull-out resistance when compared to threaded fasteners.
What kind of timber can I use when installing Supa-Tile roof sheets?
Timber that has been treated with known or unknown chemicals, may adversely react with the aluminium-zinc coating. Consult with our technical staff to make sure.
Does the foil help with the heat?
Yes, when correctly installed, the “foil” acts as a radiant barrier, reflecting most of the UV rays and heat that enters the roof cavity via convection.
Does the foil help with the noise, i.e. rain?
Foil does not have measurable sound deafening qualities. Maybe opt for a PET (Polyester Blanket or rigid board insulation).