Tools: Caulking gun, disposable paintbrush, putty
knife or trowel, whisk broom, wire brush
Materials: binding adhesive,
concrete caulk, denatured alcohol, metal primer, premixed stucco,
Material taken from
Black and Decker "Home Repair"
stucco siding is very durable, it can be damaged, and over time
can crumble or crack. Fill thin cracks with concrete caulk, which
remains flexible and prevents further cracking. If cracks are already
filled with failed caulk, remove it completely with a wire brush.
When the crack is completely clean and dry, fill it with concrete
caulk. Overfill it slightly, then smooth the joint, using a disposable
paintbrush and denatured alcohol.
a Small Area
simple repair method works well for damaged areas that are less
than two square feet. For more extensive damage, remove the stucco
all the way to the wall surface and rebuild it in layers.
removing loose material with a wire brush (photo A). Use the brush
to clean rust from any exposed lath, then apply a coat of metal
primer. Paint the broken edges of the stucco with bonding adhesive,
which will improve the bond between the old stucco and the stucco
material of the patch.
premixed stucco with a putty knife or trowel, slightly overfilling
the hole (photo B). Read manufacturer's directions—drying
times vary. Feather the edges until the patch blends into the surrounding
a whisk broom or trowel to duplicate the original texture (photo
C). Let the pat dry for several days, then touch it up with masonry
paint, matching the color with the rest of the siding.