Traditional three coat stucco

Number one material against air infiltration

April, 2016-Siding is the worst material against air infiltation. I took this picture in Arlington, Virginia, near Washington, DC. I slid a business card all the way behind the siding.

What the siding manufactures claim is a high R Factor is negated by the fact wind whips around the siding.

A study on air infiltration in stucco.

Number one material for thermal mass for hot climates

Stucco has been the material of choice for years in hot climates for thermal mass and still is. The dense heavy cement retains cooler temperatures from the night through the day. Here's what building science says about stucco in Las Vegas and Dubai, two cities known for their hot climate.

Here's what Building Science says about stucco in hot climates.

Number one finish material against earthquakes

On wood frame buildings, the lath and stucco prevents the building from shaking because it is a heavy material that is nailed directly to the structure. Brick veneer, for example, is supported by a concrete footer and attached to the building using brick ties. The shaking of an earthquake knocks the bricks loose. Other lightweight materials such as siding do nothing to prevent the building from shaking.

Number one material against hurricanes

Real cement stucco is durable enough to stand up to strong winds. In huricane Andrew, brick veneer failed because of the air space between the brick. The pressure differential sucked the brick off the wall. Materials like EIFS were blown off the wall like they were nothing.

Non-Profit Stucco Links

Technical Services Information Bureau

A non profit resource for plaster and stucco. California translation: "Scrub" means stucco finish coat. "Putty coat" means white coat, or finish coat of interior plaster.

Portland Cement Association

Standards for Installation of cement stucco.

stuccodamage.com

Kevin says a lot of things that need to be said.

Minnesota Lath & Plaster Bureau

An old and reliable source of information on lath and plaster, as well as cement plaster (stucco).

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