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Steadmans
AS35 Insulated Panels -
Insulated Roof Panels & Insulated Wall Panels
Description
AS35 Panels consist of 0.5 and 0.4mm sheets of
hot-dip galvanised or Aluzinc coated steel, which can be finished
with Plastisol, Nova or other polymeric coating. The weather sheet
and liner are autobonded to a core of polyisocyanurate insulation to
produce strong, rigid panels.
Thermal Performance
When installed, AS35 Panels provide a warm
construction, with the whole building enclosed within the insulation
envelope, so minimising thermal stress on structural elements. As
there are no metal spacers or rails between the cladding sheets the
panels provide continuity of insulation without repeating thermal
bridging.
The polyisocyanurate insulation core has low
thermal conductivity (0.019 W/mK) therefore U-values can be achieved
with thinner panel depths than those containing less effective
insulants: alternatively, depth for depth, AS35 Panels may be used
to give substantially lower U-values and so improve the overall
thermal performance of the building.
Long Term Performance
Long-term thermal performance depends on
components retaining their design performance without any
significant deterioration in the thermal resistance of the insulant.
Ageing: One of the key contributors to the high
performance of Steadmans AS35 Panels is the zero-ozone depletion
blowing agent which is embodied within the insulant's closed cell
structure. The migration of the blowing agent from the insulant
could, over time, result in a loss of performance: however, the
metal faces of the panels prevent the diffusion of the blowing agent
and ensure its retention within the insulation, so maintaining its
thermal performance. The choice of blowing agent used in the
manufacturing process maintain the panels' performance at all
working temperatures.
Edge Effects: unsealed cut edges to panels can
also cause a small amount of blowing agent loss: however, Steadmans'
use of edge seals at panel junctions minimises the area of open
edges.
Differential Movement: Rigourous quality control
during manufacture ensures the insulation core is fully bonded to
the metal facing panels and prevents delamination occurring as a
result of differential expansion between the weather sheet or liner
and the insulation. The thermal insulation core also reduces
temperature fluctuations of the weather sheet. However, where high
solar loads are anticipated the specification of a light coloured
finish is advised.
Overall, the quoted U-values for Steadmans'
panels make an appropriate allowance for ageing, ensuring the
building will continue to benefit from the panel's excellent thermal
performance.
U-values determined using finite element analysis
to BS EN ISO 10211-1:1996 ‘Thermal bridging in building construction
- Heat flows and surface temperatures Part 1. General calculation
methods’ and following the methods and conventions in BR 443
‘Conventions for U-value calculations’.
Wall panels covered by LPCB reference 635a/01,
635a/02 and 635a/03 must be laid vertically. Wall panels require
external stitching at side laps at 300mm centres. Roof panels
require external stitching at side laps at 450mm centres.
Firefighter Plus panel requires site applied graphite tape. Contact
Steadmans Technical Department for further details.
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Cladding Panels Insulated Roof and Wall Panels
Technical information associated with:
Steadmans Self Assembled Insulated Roofing Panels Water Absorption Insulated
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