Professional Gutter Cleaning & Repair in Burlington, NC

It's difficult to say. On one hand, a steep roof is less likely to collect leaves and other debris that hold moisture against the shingles and invite the growth of moss and algae. On the other hand, that same roof in an unshaded area facing due south will take the full brunt of the sun, which is hard on any roof. Actually, factors other than pitch have a greater effect on shingle durability. The side facing your worst weather typically fares worse than the leeward side. Likewise, a roof system that isn't vented properly and allows heat to build up beneath the roofing has a shorter life than one that is vented.

Basically, what you want to do is cover the damage with a woven plastic tarp that is held in place with 1x3 wood strips. Here's how I do it. First I roll one end at least twice around a long 1x3, then screw it to the undamaged side of the roof. The 1x3 "roll" should be against the roof so it won't collect water and debris. The rest of the tarp goes over the ridge and down the other side of the roof several feet beyond the damage. Then I roll the opposite end of the tarp around another 1x3 and screw it to the roof sheathing, roll side down. Now it's just a matter of using more 1x3s and screws to hold down the tarp's sides. They don't have to be rolled in the tarp. A "blue roof" isn't pretty, I'll admit, but it will keep the weather out until someone can repair the damage. Having said that, this type of emergency repair is best left to someone who has the equipment and skill to do it safely. Roofs are treacherous, particularly when wet, and tarps are slippery even when dry. You don't want to be wrestling with one in high winds, either. Better to submit a claim for property insurance than to have your family submit a claim for life insurance.

Yes, you need to strip the shingles. A single layer looks better, lasts longer, and won't put any unnecessary extra weight on the roof. As to which shingles to use, the longer the warranty, the heavier the shingle and the greater the cost. You want to look for the best warranty you can afford.