Construction Terms Terminology

Stucco Terms

Stucco
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Scratch Coat is the first coat of stucco to be applied. This coat
is applied over the metal lathe and allowed to set up a little. A
stucco scratch coat rake  is used to create grooves in the
stucco so the next coat will have bond better to the first coat.
Paperback Lathe is a product used to strengthen the stucco
and create a bonding surface. The paper is a felt paper type
paper which serves as a moisture barrier for the stucco. The
metal lathe is a diamond shaped galvanized metal product. The
paper back lathe is installed with galvanized screws or nails,
depending on the backing.
Brown Coat is the second coat applied in the application of a
real stucco system. Normally the first coat called the scratch
coat will be sprayed with water before the brown coat is applied.
Each coat should a certain of days for curing before the next
coat is applied. The brown coat will be applied and troweled
smooth before it dries.
Expansion Joint is a PVC plastic that is applied to the wall at
particular locations that are normally going to produce a crack.
Usually stucco will produce a hair line crack at outside corners
of window and door frames. There will normally be a crack
where to dissimilar materials meet. To try to prevent these
cracks, an expansion joint is installed to the wall.
Bottom Screed is a PVC plastic that is applied first at the
bottom of the wall before the paper back lathe is applied. The
paper is lapped over the flange of the screed. One type of
stucco screed that might be used is a drip screed. This product
has holes in the bottom flange to allow any water that might
penetrate the stucco to drip out. The bottom screed serves as a
screed for the stucco depending on the thickness and also
serves as a stopping point or cap at the bottom.
 
Construction Jargon