06/15/2026
Split Face Block Buildings in Chicago Have One Big Enemy. Here's How to Fight Back.
Split face concrete block's textured surface creates thousands of small recesses that capture and hold moisture. In Chicago's freeze-thaw climate, that trapped moisture freezes inside the block face, expands, and pops the surface off from the inside.
The solution is a quality penetrating silane-siloxane water repellent sealer — applied after any necessary tuckpointing work. It soaks into the block and mortar, repels water at the surface level, and lets the wall breathe naturally.
Cost for most commercial or larger residential buildings: $2 to $5 per square foot of wall.
At Roofing By Hernandez Inc., we seal split face block buildings in Chicago and the surrounding suburbs regularly. Contact us for a FREE ESTIMATE on your building.
👉 Call or visit us online for your FREE ESTIMATE today — no obligation, no pressure.
Roofing By Hernandez Inc.
📞 312-439-0556
📍 3033 N. Clark Ave., Chicago, IL 60657
🌐 https://www.roofingbyhernandez.com/contact-us/