EPS foam cladding

Many of you may have been following the ICF thread.... this is a side to that. We are renovating and will be building an ICF extension, on to our existing, no sarking ,un-insulated walls, brick veneer house. We will render the brick to the same finish as the ICF. Then I got to thinking.... Why don't I clad the BV with 100mm m-grade (same grade used by Masterwall) EPS foam sheets? By my reckoning I would have minimal, if any prep to the brickwork it would give a much smoother surface to work with, the increase in insulation value would be excellent and I'd get nice deep reveals on the windows. It would be effectively the same surface to render as the ICF so the same product and technique could be used on the entire structure. price wise the foam comes out at around $35.00 a sheet (1.2m x 2.4m) for 50 or more sheets. Can anyone see any flaws with this idea?Has anyone used EPS foam sheeting before and rendered it? (Expanded PolyStyrene)


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