Masonry Wall Design: Single-Wythe
Moisture penetration through exterior walls is a concern on every project (or – it should be a concern on every project!). Single-wythe concrete block construction does a great job in preventing water from entering the interior of your building but there are several important “belts and suspenders” that should be included in your design to make sure your masonry wall does the best job possible.
So, what do we consider a single-wythe wall? There are three major types of masonry walls built in Florida. The very best masonry wall to prevent water passage (we call it The World’s Best Wall!!) is called a double-wythe cavity wall and contains a drainage/air space between two separate wythes or “layers” of masonry. Water that makes it through the first wythe runs down the back side of the wall and is discharged to the exterior through flashing and weeps.
Contact Don Beers, PE, CGC
MASONRY CONSTRUCTION & INSPECTION WORKSHOP
By Don Beers, PE
Your family deserves a safer, longer-lasting home that saves you money! The energy eﬃciency of concrete masonry is one of the reasons it has remained
the predominate building material in Florida for the past 70 years. Thermal Mass is
the secret behind its energy saving attributes.
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As the saying goes, “I am glad you asked that question.” The short
answer is “Yes,” there is a designated minimum air space in
Many years ago when I was still in school, I had to fight for good grades
like everyone else. The problem in my math classes was not just getting
the answers correct, but providing the necessary proof for the answers. The teachers did not seem to appreciate my knowledge (or maybe it was my explanation) that if I gave them my proof, I would have to shoot them. I could see their displeasure by the drop in my grade. They finally wore down my resistance, and I decided to see reality and provide the proof with my answers.
To find the entire answer, we go to Chapter 12 of TMS 402-13. The
actual name is Building Code Requirements for Masonry Structures,
but you will find I use “TMS 402-13” or the “Code” because it is shorter.
Read the entire article: Painter's Corner ~ February 2017
Florida Building Code
Hyatt Regency Coconut Point
MAF Masonry Award
Wood Frame Construction