Local building codes and the climate determine the need and type of a vapor barrier for a building’s envelope – a decision best left to building experts, like our vapor barrier professionals at Polyguard. The humidity will seek cooler spaces of lower concentration in the walls, ceiling, etc., of moisture through diffusion. The second law of thermodynamics regulates water vapor diffusion and allows it to flow from a space of higher concentration towards an area of lower moisture concentration, or a warmer to a cooler space within the building envelope.įor example, everyday activities like cooking and laundry release water vapor into a building’s interior, which increases the humidity (water vapor). A vapor barrier prevents water vapor diffusion through building products. Water exists in three states: solid, liquid, and invisible gas (vapor). #Water barrier plusThe best peel and stick vapor barrier should provide durability, quick adherence, puncture-, chemical-, and sunlight-resistance, and lack VOCs – all features offered by Polyguard PEEL-N-STICK™ products, like Home Stretch™ ‘Peel’ N Stick/ICF Waterproofing, Aluma Flash Plus weather-resistant barriers, and PEEL-N-STICK™ Aluminum Roll Roofing. The ease of applying peel and stick vapor barriers make it the preferred water vapor barrier for residential and commercial buildings. Vapor barriers can stop or minimize condensation within the walls, foundation, roof, and floor that can lead to structurally damaging and unhealthy mold and threaten the effectiveness of insulation. Correctly installed vapor barriers (retarders) prevent water vapor from infiltrating a building envelope, provide damp proofing and improve the energy efficiency, comfort, and long-term integrity of the building.
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