What is masonry waterproofing and does my Chicago brick need it?
Masonry waterproofing is the application of breathable sealers and proper caulking to keep water out of brick and stone while still letting the wall dry. In Chicago, water is the enemy of masonry — it drives freeze-thaw damage, spalling, and efflorescence. After repairs, waterproofing protects the investment; on sound walls, it prevents damage before it starts. The key is using a breathable product, not a film that traps moisture.
Why is breathable waterproofing important?
Brick needs to release moisture. A cheap film-forming sealer traps water inside the brick, where it freezes and actually accelerates spalling — the opposite of what you want. A quality breathable masonry sealer repels liquid water from outside while allowing vapor to escape, keeping the wall dry and sound.
What does masonry waterproofing include?
- Breathable water-repellent sealers for brick and stone.
- Caulking of joints around windows, doors, and control joints.
- Crack sealing before applying repellent.
- Tuckpointing first — sealer is not a substitute for repairing failed mortar.
Frequently Asked Questions
How much does masonry waterproofing cost in Chicago?
It is usually priced per square foot and is affordable relative to the masonry it protects. Cost depends on wall area, height, and prep required. A free estimate gives the number.
How often should brick be resealed?
Breathable masonry sealers typically last several years to a decade depending on the product and exposure. A mason can advise on the right reapplication schedule for your wall.
Does waterproofing fix a leaking wall?
Waterproofing prevents absorption, but it is not a cure for failed mortar or cracks. Those must be repaired first; then sealing keeps the repaired wall dry.
Get a Free Chicago Masonry Estimate from CTC
CTC Masonry Group has restored Chicago brick, stone, and concrete since 1994 — tuckpointing, chimneys, lintels, parapet walls, foundations, and full masonry restoration across the city and suburbs. Free estimates, permits pulled, and workmanship that holds up to Chicago winters.