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  2. List of commercially available roofing materials - Wikipedia

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

    Stone slabs require a very heavyweight roof structure, but their weight makes them stormproof. An obsolete roofing material, now used commercially only for building restoration. Collyweston stone slate named after the village of Collyweston; Solar shingle; Metal shakes or shingles. Long life. High cost, suitable for roofs of 3:12 pitch or greater.

  3. Advanced composite materials (engineering) - Wikipedia

    en.wikipedia.org/wiki/Advanced_composite...

    At present, both manual and automated processes are employed in making advanced-composite parts. As automated processes become more predominant, the costs of advanced composites are expected to decline to the point at which these materials will be used widely in electronic, machinery, and surface transportation equipment.

  4. Metal roof - Wikipedia

    en.wikipedia.org/wiki/Metal_roof

    Standing seam metal roof. A metal roof is a roofing system featuring metal pieces or tiles exhibiting corrosion resistance, impermeability to water, and long life. It is a component of the building envelope. The metal pieces may be a covering on a structural, non-waterproof roof, or they could be self-supporting sheets.

  5. How Much Does it Cost to Replace a Roof? - AOL

    www.aol.com/much-does-cost-replace-roof...

    On average, labor will account for 60 percent of your roof replacement costs. Roofing is one of the most skilled and labor-intensive jobs on the market, so you can expect around $2 per square foot ...

  6. Composite material - Wikipedia

    en.wikipedia.org/wiki/Composite_material

    Composite materials are also becoming more common in the realm of orthopedic surgery, [42] and it is the most common hockey stick material. Carbon composite is a key material in today's launch vehicles and heat shields for the re-entry phase of spacecraft. It is widely used in solar panel substrates, antenna reflectors and yokes of spacecraft.

  7. Structural steel - Wikipedia

    en.wikipedia.org/wiki/Structural_steel

    Characteristics – Generally consisting of portland cement, water, construction aggregate (coarse and fine), and steel reinforcing bars , concrete is cheaper in comparison to structural steel. Strength – Concrete is a composite material with relatively high compressive strength properties, but lacking in tensile strength/ductility. This ...

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  9. Flat roof - Wikipedia

    en.wikipedia.org/wiki/Flat_roof

    A flat roof is the most cost-efficient roof shape as all room space can be used fully (below and above the roof). Having a smaller surface area, flat roofs require less material and are usually stronger than pitched roofs. [26] This style roof also provides ample space for solar panels or outdoor recreational use such as roof gardens.

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