That’s not an insulating concrete. In the words of the web site “EPS board is slurried to the deck in new construction or to the existing roof membrane in reroofing applications.”
In other words expanded polystyrene (Dow SM board or equal) is fastened to the desk and then held in place by slurry of concrete.
It sounds like a typical hot process roof where the tar holds the insulation in place instead of the concrete.
The only time you would ever mix an insulation into the concrete mix would be for lightweight concrete where something like vermulicite would be used not as insulation but as a lightweight filler.
Rick Kitson MBA P.Eng
Construction Project Management
From conception to completion
I agree with CVG, however you must be very careful on the "glue" you select. Many construction adhesives and foundation coatings used for dampproofing will cause the insulation to deteriorate. I am assuming this is a basement wall - so I would first use a dampproofing coating from Sonnoborn, Meadows or W.R. Grace, then a "protection board" then apply the rigid insulation. Check with the manufacturer for compatibilty between the products. Use an extruded insulation for below grade applications, not "beadboard", it will deteriorate from freeze/thaw cycles.
If it is not a basement wall, you can skip the dampproofing. If you are in an area that is may have high groundwater you should use a waterproofing system on the wall with waterstop in the construction joints of the wall.
There are also forming insulation systems out there that use rigid insulation as the form and you simply leave the forms in place after the pour.
This works well for basement walls. The form cost is higher but the savings in labour and the fact that the walls are then insulated result in overall cost savings.
Rick Kitson MBA P.Eng
Construction Project Management
From conception to completion
