Restoration crews across Cypress & Northwest Houston

Harris County · Pop. 2.3 million

Harris County's expansive clay soils shift enough seasonally to crack slabs and stress under-slab plumbing, which is why slab leaks are disproportionately common here compared with most of the country. Layer on bayou-adjacent flood exposure in Meyerland, Braeswood and parts of the Heights, plus a subtropical humidity level that keeps indoor dew points high nine months a year, and you get a market where a small unaddressed leak becomes a mould remediation faster than almost anywhere else in the US.

ZIPs: 77002, 77007, 77019, 77027, 77056

Harris, Fort Bend & Waller Counties · Pop. 24,000 (city) / 350,000+ (greater Katy)

The reservoir pool areas west of the Grand Parkway remain the defining flood exposure, but the day-to-day volume here comes from something more mundane: the housing stock is dominated by homes built between 1998 and 2012, which is precisely the age at which water heaters, washing machine hoses and PEX manifold fittings begin to fail. Add attic air handlers with condensate lines that clog every August and you have a suburb that generates water losses at a very steady rate.

ZIPs: 77449, 77450, 77493, 77494

Harris County · Pop. 13,000 (city) / 80,000+ (greater Tomball)

Septic system backups are the distinguishing local risk. A failed septic field or tank backup is Category 3 with a higher organic load than municipal sewage, and it frequently affects properties where the nearest neighbour is a quarter-mile away and nobody noticed for a while. Well systems add their own failure mode: pressure tanks and supply lines in garages and utility rooms that let go without any municipal shut-off available at the street.

ZIPs: 77375, 77377

Harris & Montgomery Counties · Pop. 62,000

Homes built in the Klein and Memorial Northwest areas during the 1970s and early 80s are now on their second water heater, second HVAC and — critically — original polybutylene or early copper supply in some cases. That age cohort produces a steady stream of supply line failures. Spring Creek flooding adds an episodic overlay during major rain events, particularly in the older sections north of FM 2920.

ZIPs: 77373, 77379, 77386, 77388, 77389

Montgomery County · Pop. 116,000

Canopy shade is the defining local factor. North-facing roof planes here can stay damp for days after rain, which drives roof deck deterioration, algae growth and — via clogged valleys and gutters — recurring roof leaks. Add Spring Creek and Panther Branch flood exposure in the lower-lying villages, plus mature trees dropping limbs during storms, and you get a service area where storm-related envelope damage and mould run well above metro average.

ZIPs: 77380, 77381, 77382, 77384, 77389

Harris County · Pop. 8,000 (city) / 60,000+ with the surrounding 77040 and 77064 corridor

White Oak Bayou overbank flooding is the defining exposure, concentrated in the lower-lying original sections of the city. Away from the bayou, the housing stock is old enough that we see cast iron drain failures, original galvanised supply lines and slab leaks in homes that have never had a plumbing update since construction.

ZIPs: 77040, 77041, 77064, 77065