got a new guy. well it s about time. where s the gig? gmc. proud to lend a helping hand to hometime. miriam: one thing we want to do is show some of the details going into the deck and the screen porch out back so we ll visit that part of the construction as things come together here. but let s focus right now on what s going on out front. as we start our porch roof, we re going to be using the same material as we re using on the rest of the house roof. the main element is this dimensional shingle. there are a few other things in this system that you should know about. the first is a leak barrier. this is going to go over the most vulnerable parts of the roof. and then we ll have our roof deck protection which is going to go over the rest of the sheathing. the guys are using an underlayment that s reinforced with fiberglass which is a lot lighter than conventional felts or tar papers so there s more roof protection on each roll. here s what they re using to cover t