definition
strict definition
cardboard
Related terms: corrugated fiberboard
Sheets or panels of corrugated or thickened paper used for thermal insulation.
Cardboard is a material formed by joining sheets of thick paper, usually corrugated paper lined with flat sheets for structural strength. It is an inexpensive material of medium insulation value, but must be protected from flames and moisture.
The sheets are used as panel insulation. Corrugation is usual, with flat lining sheets giving the paper assembly strength and a continuous face.
The insulating material remains paper-based even when assembled as a stiff board. Its susceptibility to flame and moisture distinguishes its protection needs from those of mineral or synthetic foam panels.
Related definitions
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aerogel
Lightweight, highly porous insulation formed by replacing a gel's liquid with gas while retaining its solid framework. -
cork panels
Sheets or panels of thermal insulation made from the bark of the cork oak tree. -
fiberglass rigid panels
Rigid or stiff panels made from glass fibers, used for thermal insulation and sound absorption. -
mineral wool rigid panels
Rigid or stiff insulating panels made from rock or slag fibers, also used for sound absorption. -
phenolic rigid panels
Rigid thermal-insulation panels made from phenol-formaldehyde foam, a synthetic polymer. -
polyisocyanurate rigid panels
Hard insulating panels made from polyisocyanurate, a plastic similar to polyurethane. -
polystyrene rigid panels
Rigid thermal-insulation sheets made from closed-cell extruded polystyrene, commonly known by the Styrofoam brand. -
polyurethane rigid panels
Hard insulating panels made from polyurethane, a common plastic with exceptionally high insulation properties. -
urea-formaldehyde rigid panels
Rigid sheets of thermal insulation made from urea-formaldehyde resin, a material distinct from polyurethane. -
vacuum insulated panels
Constructed panels containing a protected vacuum layer for thermal insulation. -
wood fiber rigid panels
Rigid sheets or blocks made from wood fibers and used as a thermal-insulation layer.