Terrazzo repairs can be frustrating at
times, especially when it is expected to match perfect
colors & matrix. Durite provides terrazzo patch
repairs and refurbishing to many building service companies,
management companies and real estate owners.
Many terrazzo floors that were constructed
since the early 30's to post-war era, require terrazzo
patch repairs and maintenance. Durite is constantly
requested to match existing terrazzo floor colors and
stone aggregates to repair broken terrazzo floors, patch
holes and floor alternation. Especially in highly visible
areas such as building lobbies and hallways terrazzo
repairs becomes necessary.
In the past, terrazzo floors used colored
cement as binder, mixed with different stone color aggregates.
Cement colors changes with each water/cement ratio mix
and only when the cement is dried, hardened and grind
down the true color of cement binder becomes visible.
Obviously working with cement requires creating many
samples to match the colors and aggregate mixture and
in general repairing a patch becomes guesswork of hit
In general excellent quality patch repairs are not cost-effective.
patch repairs requires almost same amount of machinery
mobilization, as would the construction of new terrazzo
floors. Almost all cement terrazzo surfaces oxidize,
accumulates surface dirt, and experience stones deterioration
with time. When patching terrazzo surface grinding the
floor around the patch repair becomes necessary. Once
oxidized terrazzo surface is disturbed, the true original
terrazzo floor colors hidden under the oxidized surface
will be exposed. Now the terrazzo repair choices becomes
either matching the old oxidized surface, or the original
terrazzo colors hidden under the oxidized surface. Obviously
bringing back the original terrazzo requires addressing
and refurbishing the entire floor.
matters more complicated are repairs of terrazzo surface
cracks and disintegration. This work requires removal
of surface terrazzo down to the structural floor support,
and addressing the crack by inserting steel dowels.
Usually terrazzo samples are sent
to Durite for matching color binders and aggregates.
Durite through color analysis can pre-mix the right
amounts and determine the color of the terrazzo binder.
Once the final sample is approved, Durite would prepare
the mix for the applicator. Durite's choice of pre-mixed
binder is epoxy since it offers color stability, fast
curing time and hardness (epoxy is at 12,000psi, compared
to concrete at 3,000 to 4,000 psi.