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Best House Wrap for Moisture Control in Humid Climates

Best House Wrap for Moisture Control in Humid Climates

Understanding how house wrap controls moisture in humid climates

Trusscore Wall and Ceiling panels used in dairy farm holding pens display qualities that make Trusscore a superior alternative to drywall in agricultural buildings

Although building practices are subject to change, the same principles apply: Control moisture in the indoor climate and create an external weather barrier. House wrap was invented as a barrier and filtration system to cut down on the transmittance of large water particles and odor. A quality house wrap with the recommended perm rating provides moisture control, especially in high-humidity regions like the Southeast. The following article evaluates perm rating and specs when selecting the best house wrap for moisture control in humid climates.

Understanding Moisture Control in Buildings

During and after construction, moisture accumulates between barriers, roofs and plumbing fixtures leak and internal temperatures produce condensation. Prohibiting wall components to dry results in mold, rot and structural damage. Building wrap is designed to be vapor permeable at a standard permeability rating between 10 and 20. The height of the number indicates how much moisture vapor passes through the product during a 24 hour period. This impacts humidity level, air quality and odor control. Examine the perm rating when selecting the best house wrap for moisture control in humid climates.

Choosing the Best House Wrap

Dixie Plywood partners with building wrap pioneer, Typar. Manufactured in Old Hickory, TN, Typar is the only weather-resistant barrier (WRB) to offer a lifetime warranty for residential construction. Woven strands of polyethylene and a micro-porous coating provide protection against bulk moisture. Typar has a perm rating of 12, which falls within the recommended range and is effective against humid climates. The leading building wrap competitor has a perm rating of 56 for residential construction, allowing for significantly higher moisture content.   

Typar is the only surfactant resistant house wrap. Surfactants are oils, tannins in wood, stucco chemicals, mortar and other binders used in building construction that break down chemical components. Typar is able to withstand acidic chemicals without sacrificing permeability. The leading competitor is not surfactant resistant and may face complications when in contact with harsh chemicals.

It is important to understand the primary function of house wrap and what specs to prioritize when making a selection. Review the permeability rating, resistance to surfactants and performance in a climate prior to purchasing. Humidity levels in the Southeast require additional consideration when seeking the proper moisture control for a building project. Contact our sales team in Atlanta, Fort Lauderdale, Nashville, Orlando or Tampa to purchase Typar products from a trusted distributor.

For additional information on Typar and their wide range of product offerings, visit

Looking for interior products to control moisture in humid areas? Learn how Trusscore might be the right product for you.

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