TruExterior Siding and Exterior Insulation / Rainscreen
I am an owner builder . The true-exterior manufacturer won’t warranty their siding product when installed on furring strips over rockwool. They state that the furring needs to be fastened directly to a solid substrate. The primary reason for this is that they get too many calls because of potentially suboptimal installation of the furring. i.e., furring not coplanar, furring strips spacing. Otherwise, they don’t have any issue with the long term performance.
Does anyone have experience installing this product on furring strips over mineral wool ? Is it just too tricky to get the furring coplanar and/or the product just too flexible ? Would you even consider (as owner) since it wouldn’t be warrantied ?
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