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2. Vinyl polymer - Wikipedia

   en.wikipedia.org/wiki/Vinyl_polymer

   Vinyl polymers are subject of several structural variations, which greatly expands the range of polymers and their applications. With the exception of polyethylene, vinyl polymers can arise from head-to-tail linking of monomers, head-to-head combined with tail-to-tail, or a mixture of those two patterns. Additionally the substituted carbon center in such polymers is stereogenic (a "chiral center")

3. Vinyl siding - Wikipedia

   en.wikipedia.org/wiki/Vinyl_siding

   Vinyl siding is plastic exterior siding for houses and small apartment buildings, used for decoration and weatherproofing, imitating wood clapboard, batten board and batten or shakes, and used instead of other materials such as aluminum or fiber cement siding.

4. Rule of mixtures - Wikipedia

   en.wikipedia.org/wiki/Rule_of_mixtures

   In materials science, a general rule of mixtures is a weighted mean used to predict various properties of a composite material. [ 1 ] [ 2 ] [ 3 ] It provides a theoretical upper- and lower-bound on properties such as the elastic modulus , ultimate tensile strength , thermal conductivity , and electrical conductivity . [ 3 ]

5. Calender - Wikipedia

   en.wikipedia.org/wiki/Calender

   A calender is employed, usually to smooth, coat, or thin a material. With textiles, fabric is passed under rollers at high temperatures and pressures. Calendering is used on fabrics such as moire to produce its watered effect and also on cambric and some types of sateens. Various man-made fabrics made from synthetic materials are also calendered.

6. Quantity take-off - Wikipedia

   en.wikipedia.org/wiki/Quantity_take-off

   With BIM quantity take-off can be conducted almost automatically given that the type of materials, their quantity and price is included in the model. [2] It is known that construction projects often run overtime and over budget and one of the reasons is lack of accuracy in quantity takeoff and estimates.

7. Siding (construction) - Wikipedia

   en.wikipedia.org/wiki/Siding_(construction)

   However, newer vinyl options have improved and resist damage and wear better. Vinyl siding is sensitive to direct heat from grills, barbecues or other sources. Unlike wood, vinyl siding does not provide additional insulation for the building, unless an insulation material (e.g., foam) has been added to the product.