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Community and Q&A

Do the “channels” in the Insofast product reduce the efficiency of this choice for exterior insulation?

Driven_5EM | Posted in Green Products and Materials on

I really like the idea of one product for insulation/ capillary break and insofast seems to remedy this. BUT as the other articles have indicated, those wiring channels and even the vertical channels are a concern. Has anyone done any research into this? A guy would hate to talk this product up to a client and then realize that we are going through a lot of work for a product that doesn’t meet expectations. We all wrestle with the cost of labour and every different material choice we have to handle costs the client money so if these channels are a mute point then we have a winner, but as you can tell, I am not convinced.

Can someone who is not with Insofast help with this please?

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  1. GBA Editor
    Martin Holladay | | #1

    The wiring channels will reduce the thermal performance of these panels slightly. Concerned builders can either (a) ignore the degradation in thermal performance, because it is relatively minor, (b) squirt some canned spray foam in the wiring channels to overcome the defect, or (c) install ordinary rigid foam insulation plus furring strips instead of InSoFast panels.

    If this aspect of the InSoFast product bugs you, don't use the InSoFast product.

    For more information, see Two New Exterior Insulation Products for Walls.

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