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Community and Q&A

Availability of rigid mineral wool

dagould2000 | Posted in General Questions on

I’ve asked before about exterior continuous insulation solutions and discussed my situation. The home is concrete block and from previous recommendations a rigid insulation with furring strips is going to be the most practical solution. From my own research, it would seem that a rigid mineral wool insulation would be the best product given it insect/fire/mold resistance. I’m on the west coast and the only way this product is going to be available is by shipping from an east coast factory which is significantly more costly than other rigid insulation’s. Am I nuts for trying to get this product?

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  1. Expert Member
    Dana Dorsett | | #1

    Even some box stores have R6 rigid rock wool on the shelf in my area (at about $1.04 square foot- it's not cheap, even on the right coast.) I'm a bit surprised there isn't more distribution on the left coast(?). Looks like it's about $1.21 per square foot if shipped to a CA Lowes. I would expect it to be cheaper if purchased through a distributor rather than a retailer.

  2. pnwbuilder | | #2

    HD sells it in WA state. Get in touch with their pro desk for a quote.

  3. natesc | | #3

    In CA the fire risk may make the additional cost worth it.

    In March 2017 3" thick roxul board on my relatively small house was $6200. I bought a trailer load of used 3" roofing polyiso for $800 delivered. Still have a bunch left over. I live in upstate NY.

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