Spalling Brick Repair in McHenry & Lake County
When brick faces flake, peel, and crumble, it's not just ugly — it's your wall's waterproofing failing. RCC Masonry replaces spalled bricks, restores mortar joints, and applies professional waterproofing to stop the damage cycle caused by Illinois freeze-thaw conditions.
What Is Spalling and Why Does It Happen?
Spalling occurs when the outer face of a brick breaks off in flakes, chips, or large pieces — exposing the softer, more porous interior of the brick. It's the most visible and damaging form of masonry deterioration in Northern Illinois, and it's almost entirely caused by moisture and freeze-thaw cycles.
Here's what happens: water enters the brick through failing mortar joints, cracks, or the brick's own pores. When temperatures drop below freezing, that trapped water expands by 9%. This expansion physically breaks the brick's outer shell away from its core. Each freeze-thaw cycle — and Northern Illinois gets 50-80 per winter — pushes the damage further, until entire brick faces pop off.
Signs of Spalling Brick:
- Brick faces flaking, peeling, or chipping away in layers
- Exposed rough, porous interior where smooth brick face used to be
- Piles of brick fragments on the ground below your walls
- Bricks that look pitted, cratered, or have missing chunks
- Multiple bricks in the same area showing surface damage
- Efflorescence (white powder) on bricks near spalled areas
Why Spalling Gets Worse Fast
Spalling is a self-accelerating problem — once it starts, it spreads to surrounding bricks rapidly.
Exposed Brick Core Absorbs More Water
Once the hard outer face is gone, the soft interior absorbs water like a sponge — dramatically accelerating freeze-thaw damage to that brick and its neighbors.
Adjacent Bricks Start Failing
Water migrating through a spalled brick reaches surrounding bricks through shared mortar joints, starting the same freeze-thaw cycle in previously healthy bricks.
Structural Integrity Loss
As bricks lose material, the wall loses its load-bearing capacity and weather resistance. Entire sections can become unstable if enough bricks are compromised.
Water Penetrates the Wall System
Spalled bricks no longer shed water effectively. Rain and snowmelt reach the interior wall cavity, causing insulation failure, framing rot, and mold growth.
How We Repair Spalling Brick
Our three-step process addresses the damage, replaces compromised bricks, and prevents future spalling with professional waterproofing.
1. Assess & Source
We evaluate the extent of spalling, identify the moisture source causing it, and source matching replacement bricks from regional suppliers. We also assess mortar joints to determine if tuckpointing is needed.
2. Replace & Restore
Spalled bricks are carefully removed and replaced with color-matched units. Deteriorated mortar joints are ground out and repointed with custom-matched mortar to eliminate water entry points.
3. Seal & Protect
We apply a breathable silane-siloxane waterproofing sealer to the entire repaired area. This blocks rain absorption while allowing trapped moisture vapor to escape — preventing future freeze-thaw spalling.
Cost Expectations
Transparent pricing for spalling brick repair in the McHenry and Lake County area.
Individual Brick Replacement
Removal, matching, and installation of spalled bricks
Tuckpointing (Mortar Repair)
Repointing deteriorated mortar joints that let water in
Section Repair (10-50 bricks)
Replacing a concentrated area of spalled bricks with matching units
Masonry Waterproofing
Breathable silane-siloxane sealer application
Full Wall Restoration
Extensive spalling repair with tuckpointing and waterproofing
Prices are estimates and vary based on project scope, materials, and site conditions. Contact us for a free, no-obligation quote.
Stop Spalling Before It Destroys Your Wall.
Every winter accelerates spalling damage exponentially. Replace damaged bricks and waterproof your walls now — before a small repair becomes a full wall rebuild.
Frequently Asked Questions
Everything you need to know about spalling brick repair.
Still Have Questions?
Contact us directly — we're happy to answer any concerns about spalling brick repair.
Call (224) 441-5284