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Interactive Diagnostic Tool

What's going on at your house?

Tell us what's going on. We'll help you figure out the next step.

Moisture Inspection Needed

I see mold

What This Usually Means

Mold growth on drywall, ceilings, or trim is always a symptom of unaddressed moisture—such as an attic roof leak, plumbing condensation, or high humidity in enclosed spaces.

What To Do Right Now

  • 1Avoid disturbing or scrubbing dry mold spots without protective equipment to prevent spreading spores.
  • 2Identify if there is an active damp source nearby (roof drip, window condensation, or pipe moisture).
  • 3Ensure proper ventilation in the room by opening interior doors or running exhaust fans.

What We'd Check

  • Attic framing and underside of roof deck for hidden leak trails
  • Bath exhaust vent ducting to verify it discharges outdoors rather than into the attic
  • Drywall sheathing and window surround moisture levels
Read full guide & FAQs
Home Diagnostic Reference Guide

I see mold — Diagnosis & Safe Action Plan

Mold growth on drywall, ceilings, or trim is always a symptom of unaddressed moisture—such as an attic roof leak, plumbing condensation, or high humidity in enclosed spaces.

Frequently Asked Questions

Does GBF Construction sell mold remediation?

We focus on finding and fixing the underlying building envelope leaks, roof drips, or ventilation flaws that caused the moisture in the first place.