Lee Scheidler Bio :
Maintenance
When a Metal roof is used that is called an “AG” or “Utility”
grade, these will need recoating once the factory finish wears off or
corrosion will occur. These paints are commonly Acrylic or Polyester
based. Roof coatings are the preferred material since they are able to
stay elastic and withstand the thermal cycling that occurs in metal
roofs.
Roofing materials made from Stainless Steel, Zinc or Copper will
rarely require maintenance over their lifetime. Usually the maintenance
is required due to design or installation mistakes as these materials
can commonly last over a century.
Metal roofing with long life paints like Kynar should not normally
require maintenance until the paint fails. These products have been
used for over half a century now in the U.S. and few installations have
failed. So these roofing products should be considered a lifetime
product.
Metal shakes or shingles. Long life. High cost, suitable for roofs of
3/12 pitch or greater. Because of the flexibility of metal, they can be
manufactured to lock together, giving durability and reducing assembly
time.
Mechanically seamed metal. Long life. High cost, suitable for roofs of low pitch such as 0.5/12 to 3/12 pitch.
Concrete, usually reinforced with fibres of some sort. Concrete
tiles require a stronger roof structure than slate, as some owners have
found to their cost.
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Thermoplastic (e.g. PVC, TPO, CSPE). Plastic sheets welded together
with hot air creating one continuous sheet membrane. Can be rewelded
with the exception of CSPE. Lends itself well to both big box and small
roof application because of its hot air weldability. This membrane is
installed by two methods: 1.) Rolls of membrane are attached the the
ridged insulation using a bonding adhesive. 2.) The edge of each roll
is fastened through ridged insulation into structural deck, and the
proceeding roll is lapped over the fasteners. The overlap is then
heat-welded with hot air to create a mechanically-fastened
thermoplastic roof.
ALL STAR ROOFING News
No matter where cool roofs are installed, they cut down on the urban
heat island effect, and usually lower a building’s carbon footprint.
Even in climates where there are more heating days than cooling days,
white reflective roofs may be a worthwhile investment for many reasons.
The cooling benefits of a highly reflective roof surface far outweigh
the potential winter month heating benefits of a less reflective, or
black, roof surface. Energy calculators generally show a yearly net
savings. This is true because the sun is lower to the horizon in winter
and not hitting the roof as directly or as intensely as it would in
summer, it shines fewer hours and there are more cloudy days, and snow
cover reflects the sun’s energy. Another reason: because cool roofs cut
peak use during the summer when rates are the highest, they can help
reduce the demand charge that a building pays all year on the basis of
its greatest energy use.
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Slate. High cost with a life expectancy of up to 200 years. Slate
cleaves into thin sheets, making it much lighter than concrete tiles,
though heavier than sheet steel and other light roof coverings.
Stone slab. Heavy stone slabs (not to be confused with slate)
1"-2" thick were formerly used as roofing tiles in some regions in
England. Stone slabs require a very heavyweight roof structure, but
their weight makes them stormproof. An obsolete roofing material.
Ceramic tile. High cost, life of more than 100 years.
Imbrex and tegula, style dating back to ancient Greece and Rome.
About Lee Scheidler Fabric
polyester.
PTFE, (synthetic fluoropolymer) embedded in fibreglass.
Metal roofing. Generally a relatively inexpensive building material, unless copper is used.
Galvanised steel frequently manufactured with wavy corrugations to
resist lateral flexing and fitted with exposed fasteners. Widely used
for low cost and durability. Sheds are normally roofed with this
material. Known as Gal iron or Corro, it was the most extensively used
roofing material of 20th century Australia, now replaced in popularity
by steel roofing coated with an alloy of zinc and aluminium, claimed to
have up to four times the life of galvanized steel.
Standing-seam metal with concealed fasteners.
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