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George13
Adding new insulation to existing?

The video on TOH says to lay insulation crosswise across the joists so that any gaps will be filled. However, our old insulation has settled about 50% so that is is quite a bit below the top of the joists. Would it be better to go ahead and lay the insulation between the joists, on top of the old? What about wiring; over or under the insulation?

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