Oriented Strand Board (OSB) is a structural, engineered wood panel now used for about 70 percent of all floor, wall and roof ...

Mount all four blocks to the roof sheathing and drive the top fasteners into the ridge board. Position the Cupola on the Roof ...

Cost: $300 (attic insulation), $23 per 4' x 8' board (solar sheathing), $4,000 (new roof), $600 (whole-house fan), $570 (whole-house heater), $1,450 (two skylights) After $18,500 in rebates and ...