Bunker Maintenance Questions

A full visit covers seals, waterproofing, drainage, air filtration, and backup power. Thermal imaging checks for hidden moisture, the sump pump is tested under load, airflow is measured against rated output, and the generator is run at full load. The goal is to catch leaks, blocked drains, weak batteries, or worn gaskets before they cause larger damage.

Most owners schedule at least one visit per year, with an additional check before spring thaw when hydrostatic pressure peaks. More frequent visits make sense after any observed leak, power issue, or extended period without use. Montana’s freeze-thaw cycles mean a shelter that was dry in autumn can show new intrusion points by April.

Yes. Damp spots, staining, efflorescence, or rust indicate water is already moving through the structure. Catching it early reduces the risk of mold growth, metal corrosion, and concrete spalling. Waiting until the problem is obvious usually means more extensive repair work.

A blocked French drain or failed sump pump can allow standing water to accumulate during spring thaw. A degraded door gasket that goes unchecked lets moisture and unfiltered air into the shelter. On a remote Montana property where emergency response is delayed, discovering a failed system during an actual event is a serious risk.

A generator that starts at idle may not sustain full output under load, and it tells you nothing about drainage, seals, or moisture. One failed system can create damage in others, a blocked drain raises humidity, which accelerates gasket degradation and battery corrosion. A full visit checks all systems together.

Pre-occupancy preparation follows the same inspection sequence: confirm the shelter is dry, sealed, ventilated, and that backup power is operational. It is the right time to replace filter cartridges, clear drains, and verify battery charge retention before you rely on the shelter or add stored supplies.