Why Wisconsin Chimneys Deteriorate So Fast
Wisconsin's freeze-thaw cycle is the #1 enemy of masonry chimneys. When water penetrates mortar joints — even hairline cracks — and freezes, it expands by 9%, blasting the mortar apart from the inside out. With 120+ freeze-thaw cycles per year in Waukesha County, a small crack in October becomes a crumbling wall by March.
Left unaddressed, chimney deterioration leads to water infiltration into your home, structural instability, and costly damage to interior walls and ceilings. Worse, a compromised chimney flue is a carbon monoxide and fire hazard. DT Exteriors catches these problems early and fixes them permanently — not with patch jobs, but with proper, full-depth tuckpointing and restoration techniques that last 25+ years.
Our Chimney Services
Tuckpointing
Full-depth mortar joint removal and replacement using Type S mortar matched to your brick. We don't smear over the top — we grind out deteriorated joints to proper depth and repack for a permanent bond.
Crown Repair & Replacement
Cracked chimney crowns let water pour directly into the chimney structure. We remove damaged crowns and pour new ones with proper slope, drip edges, and elastomeric sealant.
Chimney Cap Installation
Stainless steel chimney caps to keep rain, snow, animals, and debris out of your flue. Custom-fitted for a perfect seal with a lifetime warranty against rust.
Flashing Repair
Chimney-to-roof flashing is a leading source of roof leaks. We install step flashing and counter flashing using premium materials that create a watertight seal for life.