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2. Spray foam - Wikipedia

   en.wikipedia.org/wiki/Spray_foam

   Open cell spray polyurethane foam insulation being applied in wall cavities. Open cell insulation can be crushed in your hand and has a lower insulation value. Closed cell is rigid to the touch and each air cell is completely sealed. While closed cell foam has a higher R-value, it is more costly to buy. Medium-density closed-cell spray foam (ccSPF)

3. Building insulation material - Wikipedia

   en.wikipedia.org/wiki/Building_insulation_material

   Spray foam. Spray foam is a type of insulation that is sprayed in place through a gun. Polyurethane and isocyanate foams are applied as a two-component mixture that comes together at the tip of a gun, and forms an expanding foam. Cementitious foam is applied in a similar manner but does not expand.

4. List of insulation materials - Wikipedia

   en.wikipedia.org/wiki/List_of_insulation_materials

   This is a list of insulation materials used around the world. ... Closed-cell polyurethane spray foam 2.54: 1 0.97–1.14: 5.5–6.5: 38–45 Phenolic spray foam

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6. R-value (insulation) - Wikipedia

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

   Contents. R -value (insulation) In the context of construction, [2] the R-value 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 [3] flow of heat. R-value is the temperature difference per unit of heat flux needed to sustain one unit of heat flux ...

7. Styrofoam - Wikipedia

   en.wikipedia.org/wiki/Styrofoam

   Styrofoam is a trademarked brand of closed-cell extruded polystyrene foam (XPS), manufactured to provide continuous building insulation board used in walls, roofs, and foundations as thermal insulation and as a water barrier. This material is light blue in color and is owned and manufactured by DuPont. DuPont also has produced a line of green ...