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Polyethylene Insulation DPC
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Calculation method for
assessing Thermal Bridging at the edges of openings
Example
The adjacent diagram shows a window jamb in a masonry cavity wall, with Therma-Bridge
Plus closing the cavity.
Robust details require a cavity closer with a minimum
Thermal Resistance path of 0.45m:²K/W.
Calculaion
of Thermal Resistance Path (R value)
This table shows the thermal resistance for each segment of the path ABCDE.
The thermal resistance for each segment is obtained by dividing the length
of the path segment in metres by its thermal conductivity in W/mK
Path Segments
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Length (m)
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Conductivity
(W/mK)
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Resistance
(m:²K/W)
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A-B
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0.0275
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0.12
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0.23
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B-C
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0.015
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1.13
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0.013
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C-D
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0.018
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0.038
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0.474
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D-E
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0.04
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0.770
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0.052
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Thermal
Resistance Path (R value) = 0.769m:²K/W
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Elimiates Cold Bridging
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Fully Certified |
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1,000,000 + m/Linear
Supplied
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CFC/HCFC Free
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Rigid Lengths Ease
Installation |
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Meets NHBC and Robust
Standards |
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