I enjoyed the article "Building an Energy-Efficient Spec House" (8/07). I am happy to see that the insulation was kept in the rafters, rather than following the knee walls to the floor. We've tried to insulate knee walls many different ways, with little success.

I also long ago stopped attaching knee-wall studs directly to the sides of the rafters as shown in one of the story's photos [reprinted below] because it was so hard to insulate and seal around the studs. Instead I run a top plate, which eliminates the twisting in the studs and helps to distribute the flexing that rafters are prone to. Before...

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