Expansion Joints versus Control Joints

Control Joints (CJ) are 1-piece joints designed to relieve stress and minimize cracking; they accommodate initial stucco shrinkage and minor thermal movement. The Control Joints are required to form membrane panels no larger than 100 sq.ft for ceilings and 144 sq. ft. for walls. On the other hand, Expansion Joints are 2-piece joints designed to accommodate a full break through the structure across dissimilar surfaces or to deal with some minor structural movement.

V V or M Type Control Joint

AMICO Control Joint (VV or M-Type, #15 Joint) is designed to provide for movement to accommodate expansion and contraction caused by initial stucco shrinkage and minor thermal movement. Produced in galvanized steel and zinc alloy in 10’ lengths.

VV or M Type Control Joint

GROUNDS
GALVANIZED WEIGHT PER 1000 LIN. FEET
ZINC WEIGHT PER 1000 LIN. FEET
38"
225 Lbs.
180 Lbs.
12"
235 Lbs.
208 Lbs.
58"
273 Lbs.
240 Lbs.
34"*
295 Lbs.
254 Lbs.
78"
345 Lbs.
295 Lbs.

*Also available in Stainless Steel

Griplock J Control Joint

Griplock J Control Joint (#XJ15 Joint) is similar to the M Control Joint except the J design provides locking of the stucco to the edge of the joint. This design helps reduce stucco separation at the edge of the joint when stucco is forced under the J flange. Produced in 10’ lengths. Griplock J comes pre-taped to ensure a clean joint.

Griplock J Control Joint

GROUNDS
GALVANIZED WEIGHT PER 1000 LIN. FEET
ZINC WEIGHT PER 1000 LIN. FEET
12"
293 Lbs.
254 Lbs.
34"
320 Lbs.
265 Lbs.
78"
335 Lbs.
277 Lbs.
Inside Corner Control Joint

Inside Corner Control Joint is similar to the standard M Type joint, but the flanges are bent to an angle to form inside corners, allowing movement. Produced in galvanized steel or zinc alloy in 10’ lengths. Verify availability and lead-time.

Inside Corner Control Joint

GROUNDS
GALVANIZED WEIGHT PER 1000 LIN. FEET
ZINC WEIGHT PER 1000 LIN. FEET
12"
235 Lbs.
208 Lbs.
34"*
295 Lbs.
254 Lbs.
78"
345 Lbs.
295 Lbs.

*Also available in Stainless Steel

Zinc Control Joint

Zinc Control Joint has a solid flange with large holes that aid in the attachment of adjoining metal lath. The improved shoulder design allows easier stucco embedment and increases holding capacity at the joint to minimize cracking. Part comes pre-taped to ensure a clean joint. Produced in 10’ lengths.

Zinc Control Joint

PRODUCT #
GROUNDS
PIECES/CARTON
FINISH
WEIGHT/CARTON
CARTONS/PALLET
CJ500
12"
25
ZINC
60 lbs.
20
CJ750
34"
25
ZINC
66 lbs.
20

*Also available in Stainless Steel

NO93 Drywall Control Joint

NO93 Drywall Control Joint is used for veneer finish drywall installations. Mainly used from floor to ceiling in long partitions runs and from header to ceiling above door frames. Available in zinc alloy only, and is packaged in 10 ft. lengths, 25 pcs., 250 feet per carton.

NO93 Drywall Control Joint

PRODUCT
GALVANIZED WEIGHT PER 1000 LIN. FEET
ZINC WEIGHT PER 1000 LIN. FEET
NO93
332"
108 Lbs.