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Architectural shingles typically last between 20 and 30 years. While some manufacturers provide warranties for 30 to 50 years, particularly for extreme weather, achieving such a long lifespan is uncommon. The actual life of your shingles can be shorter if you live in an area prone to strong winds, hailstorms, or other severe weather. To avoid the risk of roof failure and costly water damage from leaks, it is recommended to replace your roof before it reaches the end of its expected life. Scheduling regular roof inspections every few years is a good way to assess your roof's condition and determine the best timeline for replacement.

Yes, because it prevents water damage, deters pests from accessing the roof decking, protects the roof from wind damage, and lengthens the roof's life. Plus, building codes require it. 

Roofing material costs vary depending on the type of material you choose and whether you install it yourself or hire a roofer. Shingles are the most affordable option and cost between $70 and $400 per square, metal roofing is between $100 and $1,500 per square, and concrete tile is between $300 and $1,000 per square.

Underlayment is required by building code, so any roof installed without it is technically against code. The underlayment acts as the second layer of defense against water, so installing a roof without underlayment means a much higher risk of roof leaks. You’ll have the best chance of avoiding roof leaks if you install drip edge flashing covered by underlayment, and then install your roofing material over that.