Venting a gas water heater out of the roof is preferable in most cases. Heated exhaust gases naturally rise, so a vertical vent pipe is efficient. If you’re trying to vent through a pipe exiting a wall, the angle of the pipe may be more horizontal than vertical, making the venting system less effective. If you go through a wall, you may need to add a fan to ensure a successful expulsion of the gases outdoors.

Hiring a reliable roofing contractor requires finding a company in your area with years of experience, holds the necessary licensing, and has a history of positive customer reviews and services. Start by researching whether a roofer you’re considering hiring holds the necessary certifications. Consider requesting customer references from your top contenders. Finally, get quotes from a few roofing companies and decide which provides the best value overall.

There are two main types of roofing shingles: 3-tab and architectural. Architectural shingles cost more than 3-tab but offer a more unique look and can last longer. However, 3-tab shingles are lightweight and affordable, and many people use them for both patching roofs and installing new roofs. Ultimately, the best type for you depends on your budget and your home’s aesthetic.

Asphalt shingles blister when air gets trapped between building materials, either within the layers of the shingle itself or in adhesives on the undersides of the shingles. As the roof heats up in direct sunlight, the trapped gas expands and creates a bubble in the roof. Eventually, the bubble can pop, leaving an exposed area of decking and underlayment.