Control joints
(expansion joints)

Ask the pros- November, 2002
By Reggie Bullard


Control joints (expansion joints)

I live in Phoenix, Az. Are control joints necessary in stucco here?

From South Carolina:

I have traditional concrete stucco house in great shape.
Its on the market and a prospective buyer chose to have it inspected
because of the flap over EIFS (which I don't have).
The 'inspector' poked holes in all my floor boards but could not find
any significant moisture. He then decided to make several negative
comments about the lack of space joints (there are not large expanses, no bigger than 10X20 segments) and also complained that he couldn't see the flashing around windows and doors therefore he assumed there wasn't any.
Needless to say, I need to refute this report and need a knowledgeable individual to assess this situation.
Any recommendations?

Manufacturers recommendations for control joints (United States Gypsum) says a Maximum spacing of 18x18 feet or 324 square feet.

Expansion joints weren't even invented until the 1950's, and stucco has been around for over 8000 years.

There is no building code here in Virginia or
in probably South Carolina governing control joints or stucco at all.
I hate control joints because I think they are ugly,
and at times, do more harm than good.

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