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  2. Superinsulation - Wikipedia

    en.wikipedia.org/wiki/Superinsulation

    For example, with an internal room temperature of 20 °C (68 °F), the vapor barrier will then only reach 7.3 °C (45 °F) when the outside temperature is at −18 °C (−1 °F). Indoor air dew point temperatures are more likely to be in the order of around 0 °C (32 °F) when it is that cold outdoors, much lower than the predicted vapor ...

  3. Vapor barrier - Wikipedia

    en.wikipedia.org/wiki/Vapor_barrier

    A vapor barrier on the warm side of the envelope must be combined with a venting path on the cold side of the insulation. This is because no vapor barrier is perfect, and because water may get into the structure, typically from rain. In general, the better the vapor barrier and the drier the conditions, the less venting is required. [7]

  4. Damp proofing - Wikipedia

    en.wikipedia.org/wiki/Damp_proofing

    A damp-proof course (DPC) [2] is a barrier through the structure designed to prevent moisture rising by capillary action such as through a phenomenon known as rising damp. Rising damp is the effect of water rising from the ground into property. [3] The damp proof course may be horizontal or vertical. [4]

  5. Building insulation material - Wikipedia

    en.wikipedia.org/wiki/Building_insulation_material

    Open-cell foam is porous, allowing water vapor and liquid water to penetrate the insulation. Closed-cell foam is non-porous, and not moisture-penetrable, thereby effectively forming a semi-permeable vapor barrier. (N.B., vapor barriers are usually required by the Building Codes, regardless of the type of insulation used.

  6. Building envelope - Wikipedia

    en.wikipedia.org/wiki/Building_envelope

    In order to achieve these objectives, all building enclosure systems must include a solid structure, a drainage plane, an air barrier, a thermal barrier, and may include a vapor barrier. Moisture control (e.g. damp proofing) is essential in all climates, but cold climates and hot-humid climates are especially demanding. [8]

  7. Housewrap - Wikipedia

    en.wikipedia.org/wiki/Housewrap

    Housewrap functions as a weather-resistant barrier, preventing rain or other forms of moisture from getting into the wall assembly while allowing water vapor to pass to the exterior. If moisture from either direction is allowed to build up within stud or cavity walls, mold and rot can set in and fiberglass or cellulose insulation will lose its ...

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  9. Insulated glazing - Wikipedia

    en.wikipedia.org/wiki/Insulated_glazing

    IG units typically last from 10 to 25 years, with windows facing the equator often lasting less than 12 years. IGUs typically carry a warranty for 10 to 20 years depending upon the manufacturer. If IGUs are altered (such as installation of a window insulation film ) the warranty may be voided by the manufacturer.

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