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2. R-value (insulation) - Wikipedia

   en.wikipedia.org/wiki/R-value_(insulation)

   Installed faced fiberglass batt insulation with its R-value visible (R-21) [1]. The R-value (in K⋅m 2 /W) is a measure of how well a two-dimensional barrier, such as a layer of insulation, a window or a complete wall or ceiling, resists the conductive [2] flow of heat, in the context of construction. [3]

3. List of insulation materials - Wikipedia

   en.wikipedia.org/wiki/List_of_insulation_materials

   This is a list of insulation materials used around the world. Typical R-values are given for various materials and structures as approximations based on the average of available figures and are sorted by lowest value. R-value at 1 m gives R-values normalised to a 1 metre (3 ft 3 in) thickness and sorts by median value of the range.

4. Thermal transmittance - Wikipedia

   en.wikipedia.org/wiki/Thermal_transmittance

   Choice of materials and quality of installation has a critical impact on the window insulation results. The frame and double sealing of the window system are the actual weak points in the window insulation. Typical thermal transmittance values for common building structures are as follows: [citation needed] Single glazing: 5.7 W/(m 2 ⋅K)

5. Sound transmission class - Wikipedia

   en.wikipedia.org/wiki/Sound_transmission_class

   Single pane glass window (typical value) (dual-pane glass window range is 26–32)"STC Ratings". 33 Single layer of 1 ⁄ 2-inch (13 mm) drywall on each side, wood studs, no insulation (typical interior wall) 39 Single layer of 1 ⁄ 2-inch (13 mm) drywall on each side, wood studs, fiberglass insulation [33] 44

6. Building insulation material - Wikipedia

   en.wikipedia.org/wiki/Building_insulation_material

   R-Value 3.4 – 3.8 (RSI-0.60 – 0.67) per inch (imperial units) Loose fill insulation fills the wall cavity better than batts. Wet-spray applications typically seal even better than dry-spray. Class I fire safety rating; No formaldehyde-based binders; Not made from petrochemicals nor chemicals with a high toxicity

7. Thermal conductivity and resistivity - Wikipedia

   en.wikipedia.org/wiki/Thermal_conductivity_and...

   The construction industry makes use of measures such as the R-value (resistance) and the U-value (transmittance or conductance). Although related to the thermal conductivity of a material used in an insulation product or assembly, R- and U-values are measured per unit area, and depend on the specified thickness of the product or assembly. [note 2]