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| ON:
Asbestos and fibre cement sheets |
All fibre cement roofs degrade with age. Surfaces become
porous after weather erosion, bolt holes elongate with
normal roof movement often leading to sheets loosening
and overlaps opening, becoming vulnerable to water ingress.
Complete replacement is expensive particularly since the
old sheets may require controlled disposal. After surface
preparation within health and safety guidelines, and attention
to bolt holes and overlaps, these roofs can be encapsulated
with the Duoprene
2000 Polyurethane System to significantly extend
their operational life. |
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Ageing of asphalt roofs results in surfaces cracking,
sometimes substantial, and porosity of the surface
allowing water penetration. Water trapped beneath
the asphalt surface will vaporise, expand and force
the formation of blisters, progressively increasing
the possibility of water ingress. These problems
can be solved by a minimum three coat application
of the Duoprene
2000 Polyurethane System, following necessary
attention to surface defects. [enlarge
image] |
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Felt surfaces become vulnerable to water ingress with
age. Surface damage, delamination at overlaps and surface
porosity are usually serious problems. Once water penetrates
beneath the surface it can vaporise and force the formation
of blisters and splitting thus increasing the possibility
of further water ingress. The Duoprene
2000 Polyurethane System will provide the solution
to these problems following attention to all surface defects
and delamination and the installation of flexible seals
at overlaps. [enlarge
image] |
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| C.A.S.A.L. could be the solution
to your roofing problems |
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