The north side of the ADU is fire-rated as it’s within 3 feet of the property line. This means DensGlass paneling goes over the ply sheathing on the north side, the first 4 feet of the upper roof deck will be fire-resistant plywood, and the interior north wall will be covered in fire-rated gypsum rather than standard drywall.

The DensGlass is not structural; that’s the job of the underlying nailed plywood. So the panels are screwed in rather than nailed.

ODuin Construction hanging the DensGlass.

Published by

Bill Dickens

I grew up on a hill country farm in New Zealand, then lived and worked in Hong Kong. I moved to Portland, Oregon in 2009. I'm presently renovating my 1929 "English Cottage" house in the Irvington Historic District.

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