Roof insulation is ideal way to prevent
unwanted heat penetration from the outside of the building. Roof insulation
foil will reduce the amount of sun's radiant heat that penetrate in summer up
to 95 percent and also render better thermal protection in colder situation in
winter. Effective temperature insulation material preserves the convective heat
inside in the winter and creates warmer atmosphere. Applying the perfect type
of insulation diminish the amount of energy required for the heating and
cooling inside the building and thus permit us to run heating and cooling
device less and making them to last longer with reducing energy cost. It also
helps to get smaller size of HVAC equipment for larger size of buildings.
Properly installed roof insulation material also decreases the chances for
thermal and moisture condensation creating problems like mold, mildew, rot and
dripping. Applying rood insulation with enough ventilation under the roof
surface will help moisture to escape and stop the ice buildup and damage cause
by it.
Tiled roofs without sarking can have it
added easily if the roof is being re-tiled. If the tiles are to remain in place
and the roof space is accessible, you can add double sided foil or foil batts
between the rafters or trusses, directly under the tile battens.
Metal roofs need a condensation barrier
directly beneath them: a layer of reflective foil sarking is an effective
membrane and a barrier to radiant heat, thus doing two jobs at once. It is
usually necessary to remove the roofing to install it, but most metal roofing
can be removed and reinstalled easily, without damage.
If sarking has been fitted it may still be
necessary to fit extra layer/s of foil beneath it. Always maintain a minimum
air gap of 25mm between layers. If the roof is being painted to restore color,
select the lightest color permissible which heat-reflective roof paints are
also an option and then match the remaining color scheme to it.
The ideal roof insulation material for
metal building is reflective insulation. It can be laid under the metal roof
decking or at the top of the surface. In addition, it can be associated with
spray foam from the underneath once the roof decking is in place. In cooler
atmosphere, a combination of Batt insulation and reflective foil insulation can
work best. Applying the reflective insulation on warmer side will let double as
vapor barrier and stop moisture from getting inside. However, any of these
types will help reduce the noise levels both inside and from the outside as
well. Condensation is one of the major problem faced in the metal structure.
Water and moisture in contact with metal surface creates corrosion and can
reduce the service life of the structure. Accumulation of water on the roof
surface can direct result into dripping, staining, mold, mildew and odors.
Additionally, it is important to remember that water or ice collection in
fiberglass, blanket or paper wool can seriously degrade the thermal and
insulation performance of the material. All of such problems can be overcome by
properly by installing vapor barrier system under the roof. Even in only
moderately humid conditions, moisture condensation can stimulate serious
problems for unprotected metal structure. Fiberglass roof insulation is not
that effective in moist situation, instead using reflective insulation can work
better. It will not get wet and has longer life compare to woolen, paper and
fiberglass. It act as vapor retarder by limiting the passage of water vapor and
moisture and thereby preventing the condensation problem.
