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  2. 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]

  3. Superinsulation - Wikipedia

    en.wikipedia.org/wiki/Superinsulation

    The easiest way is often to add layers of continuous rigid exterior insulation, [7] and sometimes by building new exterior walls that allow more space for insulation. A vapor barrier can be installed outside the original framing but may not be needed. An improved continuous air barrier is almost always worth adding, as older homes tend to be ...

  4. 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 ...

  5. Interstitial condensation - Wikipedia

    en.wikipedia.org/wiki/Interstitial_condensation

    effective vapor barrier wall sealing; proper insulation; using an diffusion tight vapor barrier (vapor check) on the warm side of the insulation, i.e., inside the assembly on a heated building and outside on a cooled building. [4] Vapor barriers can be problematic because they difficult to install perfectly and also reduce the ability of a ...

  6. Building insulation material - Wikipedia

    en.wikipedia.org/wiki/Building_insulation_material

    A building site for a row of riverside apartment blocks in Cambridge. The buildings are being constructed using a systems build with a steel frame and various prefabricated components. The blue plastic on the central building is the vapour barrier for the thermal wall insulation before the exterior cladding has been fixed.

  7. External wall insulation - Wikipedia

    en.wikipedia.org/wiki/External_wall_insulation

    An external wall insulation system (or EWIS) is a thermally insulated, protective, and decorative exterior cladding procedure involving the use of expanded polystyrene, mineral wool, polyurethane foam or phenolic foam, topped off with a reinforced cement based, mineral or synthetic finish and plaster.

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