vapor barrier
Humidity control layer
A vapor barrier is a material that resists the passage of moisture through walls, floors, or ceilings.
Typically plastic sheeting or foil, it prevents condensation from forming inside building structures where it could cause mold or rot.
The contractor installed a vapor barrier before adding insulation.
Also called vapor retarder.
- weatherproofingProtection from outdoor conditions
- kraft paperCoarse brown wrapping material
- permeabilityAbility to transmit fluids
- polyethyleneThermoplastic from ethylene gas
- dew pointCondensation begins here
retarder · condensation · thermal bridging · indoor air quality · mold prevention · sealant · airtightness · climate zones · basement waterproofing · insulation · spray foam · energy efficiency · underlayment · ventilation systems · humidity control · R-value · damp · subfloor
- atticrafters, attic room, joists, eaves, exposed beams
- basementsbasement stairs, basement walls, basement door, basement bar, finished basement
- waterproofwaterproof, water resistant, water repellent, watertight, impermeable
- car door partshandle, lock, hinge, latch, seal
- coatingspaint, enamel, varnish, primer, glaze
- Flooring Servicestile installation, laminate flooring, vinyl flooring, refinishing, sanding
air/moisture movement function
vapor barrierventilation
Circulation of fresh air
air vent · vent · gable vent · exhaust fan · weep hole