Insulation

Construction terms · plain-language definition, with its source

Construction terms · definition

Material that resists heat flow, rated by R-value, installed in walls, ceilings, and floors. Opened walls are the opportunity to upgrade insulation while it is accessible.

Source: U.S. DOE — Insulation

Where this comes up on this site

  • Joist

    One of the repetitive horizontal members that support a floor or ceiling, spanning between beams or walls. Joist size, spacing, and direc…

  • Inspection

    A code official's review of work at defined stages (rough-in, framing, final) to verify compliance before the next phase can proceed. Fai…

  • Knee Wall

    A short wall, typically under a sloped roof or supporting a counter or railing, that is less than full ceiling height.

  • Header

    A horizontal structural member spanning the top of an opening (door, window, cased opening) that transfers the load above around the open…

  • Lien

    A legal claim against your property for unpaid work or materials. A mechanic's lien filed by an unpaid subcontractor can cloud your title…

  • Hazard

    A condition or activity with potential to cause harm — electrical, structural, dust, fall, or material (lead, asbestos). Identifying haza…

  • Lien Waiver

    A signed document in which a contractor or supplier gives up the right to file a lien for a given payment. Collect lien waivers with each…

  • Hard Costs

    The tangible construction costs — labor, materials, equipment — as opposed to soft costs like design fees, permits, and financing. Hard c…

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