Bob flashed back to the installation of the new roof. First the crew removed the old layers of roofing material from the barn. Next they added a layer of Louisiana Pacific oriented strand board (OSB) over the original sheathing. It's manufactured with thin wafers of wood, resins and wax compressed under intense heat. When used as roof sheathing it's extremely resistant to moisture damage. Then they stapled down a layer of felt paper and marked with chalk lines to lay out the courses of asphalt shingles. Since these are double layer shingles, they're fastened along the pre-marked white line to assure that both layers are attached to the roof. Frames for the Velux VSE skylights were installed. These vented skylights will be operated with a hand-held remote. Copper step flashing is added to the side of the skylights and the asphalt roof shingles are fastened up to it.

Ryley and Dominic demonstrate installation of architectural grade dimensional asphalt shingles on the Habitat for Humanity Blitz Build house in Yonkers, New York.

Bob and roofer Paul Morris start by cutting a rough opening in the roof and laying a weather shield. The skylight is mounted into place and the flashing is applied. Bob then assists in laying the new asphalt-shingles.

TechShield radiant barrier sheathing can help homeowners conserve energy by keeping up to 97 percent of the sun's radiant heat from entering the attic. TechShield, the only radiant barrier sheathing with post-lamination incising, effectively allows moisture to escape from the foil side of the board should it get wet. Studies have shown that using a radiant barrier can effectively reduce the amount of energy required to cool the home by up to 20 percent. And TechShield radiant barrier sheathing adds no additional time or labor costs to the construction, because the foil is already laminated to the board.

House eleven of the Elmwood project. The attic of a house, owned by Don DeSantis and Ron Hirschauer, is transformed into an exercise space.

House seven of the Elmwood project. Homeowner Robert Emanuel has old shingles on the roof and sidewall replaced.

House eleven of the Elmwood project. A new kind of rubber slate is applied to the entire roof.

Bob meets with the President of the Metal Roofing Alliance and demonstrates installation of metal roofing panels.

Bob tours the ongoing remodeling project pointing out some of the trials and tribulations of such a large project. Rooms that were not planned on being touched ended up needing to be structurally changed to accompany a portion of the new roof. Windows and floors have both added to some interesting delays. Even the Home Again team must succumb to some construction hurdles. Bob then tours the upstairs pointing out the windows insulation and roofing.