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  2. List of commercially available roofing materials - Wikipedia

    en.wikipedia.org/wiki/List_of_commercially...

    A shingle is the generic term for an individual roofing unit that is applied with other such units in an overlapping fashion. [2] Wood shingle, shingles sawn from bolts of wood such as red cedar which has a useful performance life expectancy of up to 30 years. However, young growth red cedar has a short life expectancy and high cost.

  3. Flat roof - Wikipedia

    en.wikipedia.org/wiki/Flat_roof

    It is a low-cost membrane, but when properly applied in appropriate places, its warranted life-span has reached 30 years and its expected lifespan has reached 50 years. There are three installation methods: ballasted, mechanically attached, and fully adhered. Ballasted roofs are held in place by large round stones or slabs.

  4. Roof - Wikipedia

    en.wikipedia.org/wiki/Roof

    All standard roofing materials have established histories of their respective longevity, based on anecdotal evidence. Most roof materials will last long after the manufacturer's warranty has expired, given adequate ongoing maintenance, and absent storm damage. Metal and tile roofs may last fifty years or more. Asphalt shingles may last 30–50 ...

  5. A 50-year roof life? Did condo board make unwise ... - AOL

    www.aol.com/news/50-roof-life-did-condo...

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  6. Roof insurance: ACV vs. replacement cost - AOL

    www.aol.com/finance/roof-insurance-acv-vs...

    For example, if the replacement cost — not the amount that you paid for it originally, but the amount it would cost to replace it today — for your roof is $20,000, but the roof loses 5 percent ...

  7. Thatching - Wikipedia

    en.wikipedia.org/wiki/Thatching

    A thatched roof ensures that a building is cool in summer and warm in winter. Thatch also has very good resistance to wind damage when applied correctly. Thatching materials range from plains grasses to waterproof leaves found in equatorial regions. It is the most common roofing material in the world, because the materials are readily available.

  8. Reinforced concrete structures durability - Wikipedia

    en.wikipedia.org/wiki/Reinforced_concrete...

    Figure 2 - Failure probability and target service life in performance-based service life models for reinforced concrete structures. Performance-based approaches provide for a real design of durability, based on models describing the evolution in time of degradation processes, and the definition of times at which defined limit states will be ...

  9. Life expectancy - Wikipedia

    en.wikipedia.org/wiki/Life_expectancy

    Aztec life expectancy 41.2 years for men and 42.1 for women. [38] Late medieval English peerage [39] [40] 30–33 [32] Around a third of infants died in their first year. [19] Life expectancy at age 10 reached 32.2 remaining years, and for those who survived to 25, the remaining life expectancy was 23.3 years.