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Q.
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How long has the system
been in use?
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Q.
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If there are rooms
in the attic area can the system still be used
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A.
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Sprayed urethane foam
was developed in America over 30 years ago and introduced
into our Country in the mid 70's. The Directors of Insutek
have been involved with the system for over 20 years.
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A.
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Yes. It is technically
possible to carry out an installation around rooms in lofts.
The insulation benefits make the rooms much warmer in winter
and cooler in the summer
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Q.
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Is it approved by
Building Societies?
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Q.
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Can alterations to
the roof be made later - i.e window installations?
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A.
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Yes. Both Architects
and Surveyors have regularly specified its use in commercial
and domestic properties - many of them listed.
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A.
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Certainly. But it
would be more cost effective to make them first.
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Q.
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Does the system cause
condensation?
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Q.
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Does the material
show from the outside?
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A.
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No. Quite the contrary.
Condensation previously forming on the underside of the slates/tiles
is completely eliminated as the average thickness of foam
raises the surface temperature well above dew point.
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A.
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No. As long as the
Insutek Technicians have checked the roof to ensure all missing,
slipped or unsuitable tiles or slates have been replaced our
fast - curing foam will not run out between the tiles or slates.
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Q.
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Does it cause deterioration
of the roofing timbers?
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Q.
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What if a tile or
slate breaks following installation?
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A.
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No. Insutek urethane
foam does not constitute a moisture-vapour barrier and therefore
allows the timbers to 'breathe'. Ventilation of the roof-space
is maintained by leaving conventional air gaps at soffit-level
or by installing further vents in the roof, to meet current
Building Regulations.
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A.
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This is very unlikely
as the system has been wind-tested at 200 m.p.h! However,
should an object, say a chimney pot - hit the roof and damage
tiles or slates it is a simple process to cut the foam from
the substrate, replace damaged tiles or slates and re-foam
the area.
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Q.
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Does the system present
a fire risk?
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Q.
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Is it a do-it-yourself
job?
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A.
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Again No. Insutek
urethane foam meets British Standards BS 476 Part 7:71 to
Class 1 surface spread of flame.
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A.
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Definitely No. The
installation must be carried out by manufacturer-trained technicians
who can recognise and complete the vital preparation works
and spray the system correctly
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Q.
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Will it add substantial
weight to the roof?
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Q.
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How long does it take?
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A.
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The hardwearing Insutek
foam is extremely light and will add a mere 2kg per square
metre of roof area.
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A.
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This obviously depends
on the size and general condition of the roof. An average
3 bedroom semi-detached house would normally be completed
within a day
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