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Roof underlayment usually lasts as long as the roofing material that covers it, as it’s not directly exposed to the elements. In most cases, roofing companies will replace the underlayment each time they install a new roof. In some cases, particularly with slate, clay, or certain metal roofs that can last 50 to 100 years, your underlayment may require replacement within that timeframe, especially if you start to notice roof leaks.

There should be small gaps between your roof and the walls of your home, and other buildings. These small gaps let building materials shift, expand, and contract with weather and other outside forces, and they prevent moisture from wicking down walls from roofing and gutter systems. Without these strategic gaps, your home’s exterior and its finishes can sustain water damage, decay, peel, delaminate, and crack. However, there is a fine line between a smart gap and a problematic gap—all  gaps should be small, intentional, and covered or filled in with foam insulation to prevent pests from using them as access points.

No, there’s no specific building code that requires a roof overhang. However, installing your roof with the standard 2-inch overhang is good practice, as it helps direct runoff away from your fascia boards and roof decking and into your gutters. Some overhang is especially important in areas that see heavy rainfall and snowfall, as the risk of water getting under the roofing material and causing water damage is much higher.

As with any roofing material, there are benefits and drawbacks to consider before installing roll roofing. On the plus side, roll roofing is budget-friendly, lightweight, and comparatively easy to install. It is also ideal for low-sloped roofs and lasts around 10 years. The cons of roll roofing, however, include its low durability compared to roofing materials, restricted color choices, and low ROI.

Pros:

• Low-cost

• Lightweight

• Cut to size

• Easy and quick installation 

• Designed for low-sloped roofs

• Waterproofs your roof for an average of 10 years

• Easy to purchase and transport

Cons:

• Less durable than asphalt shingles

• More prone to cracks and tears

• Short life span

• Not as many color or style choices

• Not as aesthetically pleasing as shingles, wood, or clay tiles

• Not preferred for a higher home resale value