[Greenbuilding] Unifoam vs Plastispan

[John Salmen]

Plastifab EPS foam as a geo-foam has been used under roads bridges buildings etc for a long time. The moisture intake is very small and useful I think in that it can store and release small amounts as needed. 

 

From: Greenbuilding [mailto:greenbuilding-bounces at lists.bioenergylists.org] On Behalf Of Lynelle Hamilton
Sent: Tuesday, October 3, 2017 3:25 PM
To: Green Building
Subject: [Greenbuilding] Unifoam vs Plastispan

 

I am insulating under a floating pad. The engineer has specified 25psi under the slab and 30 psi on outer edges.   I've been looking at two products: Unifoam 25/30 and Plastifab 25/30. Aiming for R35 under the slab.  Price differential is significant (Unifoam is nearly $3000 more) for the house.  

Has anyone had experience with either product? From the specs, Unifoam appears to absorb less water and has less deflection, but both are within the ASTM spec for the issue. 

Many thanks for any insights!

Lynelle Hamilton

 


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