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  1. XYZdayz

    Installing a fan and skylight when there are square metal frames welded underneath the roof skin???

    Any suggestion for this fan and skylight install? There is a 1 -1/2" square metal tube frame welded into the roof supports around the 14"x 14" roof penetration for the fan (also for a skylight) I bought a frame adapter for the roof ribs and the instructions says "you only want the screw to...

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