Skip to main content

Water transport in cavity assemblies

What two products or means address the mechanisms that transport water through a wall or roof cavity?

AnswerVapor barriers seek to limit water vapor diffusion through a wall or roof assembly, whereas air barriers address air leakage by stopping infiltration and exfiltration. However, air leakage is capable of transporting more moisture through the assembly than water vapor diffusion.

Comments

Try These Too!

Building Efficiency

Convert the usable area of classrooms planned with medium efficiency level of new construction to the gross building area given the following model factors: Net Assignable Square Feet: 10,000, Space Factor: 1.5, Building Efficiency Ratio: 67%

Spec coordination

In case there is a discrepancy between specifications and the drawings, which takes precedence? Answer Neither, A201 considers these - quote - complementary and what is required by one shall be binding as if required by all.- unquote. ARE 4.0 exam prep: CDS

Footing cross-section

When the thickness of a foundation wall = 6", the cross-sectional proportions in this image are appropriate for which of the following: A. a footing supported on clay soil B. light frame construction supporting one floor and one roof C. allowable bearing capacity of foundation soil is low in relation to building loads D. when a continuous footing is required Answer B. light frame construction supporting one floor and one roof (in accordance with Table 1805.4.2) ARE 4.0 exam prep: PPP