Is black fiberboard the same as “iso”?
Here is the response I got from a roofing company when I asked why they were using black fiber board instead of ISO board on a flat roof installation at my house which was stipulated on the proposal I signed.
Can anyone confirm if this is true or not, because it doesn’t make sense from what I have learned over the years and maybe I have missed something about what iso means exactly … as I thought it was a poly-based material.
“They are using iso it’s a black fiber board, it’s what we use on all flat roofs.”
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