The new phenolic is not the old phenolic
New catalysts with minimum detectable halogens
Low water absorption (the difference between 0.9% for phenolic vs. 0.2 for cellular glass is not material)
Phenolic with 60% better insulating value
0.18 versus 0.30 at 50°F
2.5 inches versus 4.5 inches thickness in a typical 50°F scenario
Phenolic is roughly 67% lower cost per board foot
Plus lower fabrication/
#2 and 3 above when taken together puts phenolic capital costs possibly at one-third that cellular glass - - and that's ignoring fabrication and installation
Phenolic is one-third the weight of cellular glass
6 times more weight per linear foot in the 2.5 vs 4.5 inch scenario
In summary, both phenolic and cellular glass have been demonstrated as viable choices as insulation for cold applications when 25/50 is required. However, when comparing both side by side, the overall advantages clearly belong to phenolic.
On our site Dyplast is full Technical Bulletin.
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