Birmingham City Hall

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Project History

Birmingham City Hall was designed by noted Michiganarchitect Marcus Robinson Burrowes. Deicing salts causedthe deterioration of existing limestone at the foundation,the marred perimeter stones were at eye-level height andobvious to pedestrians. Some stones required substantialrestoration and others only minor surface treatment.Furthermore, the limestone had a bush hammer texturethat needed to be recreated. Matrix, a trowel appliedcement-based repair mortar that is also resistant to deicingsalts, was selected as the material for the deeper patchwork.The contractor color matched Matrix to the original limestone.Deteriorated sections were cut out, removed, and repairedwith the customized Matrix. MIMIC TR, a brush appliedcementitious repair mortar designed for thin repairs,was used where the removal of stone was not necessary.Both Matrix and MIMIC TR were ingeniously texturedwith a hair pick to replicate the sought-after bush hammereffect and blended the old with the new.
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