Definition of batt in US English:



  • 1A piece of felted material used for lining or insulating items such as quilts and sleeping bags.

    • ‘Care must be taken in removing the water so that the batt isn't stretched or torn.’
    • ‘No batt insulation would be required in this case.’
    • ‘‘She'd get a lot more out of that cape if she had some batts in there to stiffen out the edges,’ said another one.’
    1. 1.1 A piece of fiberglass used to insulate buildings.
      • ‘Another proposal would entail removing the subfloor to lay in batts of insulation between the subfloor and the ceiling.’
      • ‘Fiberglass is available in foil-backed, paper-backed and un-faced batts and blankets.’
      • ‘Bulk insulation like pink batts is less desirable, because it prevents the house cooling down at night.’
      • ‘Some builders have taken to cramming oversized standard fiberglass batts into wall and ceiling spaces.’
      • ‘Is asbestos sheeting ‘like’ fibreglass batts for insulation?’
      • ‘In new construction, the vapor retarder facing should be installed with the facing placed down toward the ceiling gypsum board, except in hot humid climates where unfaced batts should be used.’
      • ‘Blankets, in the form of batts or rolls, are flexible products made from mineral fibers.’
      • ‘The vapor barrier might be tar paper, kraft paper attached to fiberglass batts, or a plastic sheet.’
      • ‘Instead, it's destined for insulation batts or even road base.’
      • ‘Its thermal resistance is approximately R - 3.7 per inch, which is comparable with sprayed cellulose insulation or high-density fiberglass batts.’
      • ‘Use a straight edge to assure a good straight cut across the fiberglass batt.’
      • ‘I saw a claim very recently that New Zealand houses had to have a whole lot of fibreglass batts in them because we were dying in our homes because they were too cold.’
      • ‘First of all, where the R-value is used to rate the energy efficiency of a single component - a batt of insulation for example - U-values rate the energy efficiency of the combined materials in a building component or section.’
      • ‘For loose-fill insulation or for batts and blankets not having an attached vapor retarder, heavy-weight polyethylene plastic sheets are available in rolls of various widths for use as vapor retarders.’
      • ‘In attics, thermal bridging can be reduced by adding sufficient loose-fill insulation thickness, or cross-installed batts, to cover the wood or metal frame as much as possible.’
      • ‘When installing a batt of insulation, the vapor barrier - that's the paper or foil face - needs to face toward the heated space.’
      • ‘To meet this recommendation, most homes and additions constructed with 2 x 4 walls require a combination of wall cavity insulation, such as batts, and insulating sheathing, such as rigid foam boards.’
      • ‘Allow yourself 3 to 4 person hours per 100 square feet when installing fiberglass batts and a vapor barrier in the attic.’
      • ‘Such methods may result in fewer gaps in the building's thermal envelope than can occur with batts.’
      • ‘Before installing the dropped ceiling frame, you can also staple batts of insulation to the original ceiling to create yet another layer of noise-reducing material.’


Late Middle English (in the general sense ‘lump, piece’): of unknown origin.