MOLD TREATMENT & CRAWL SPACE ENCAPSULATION
We determine and eliminate the cause of mold, then treat the cause to prevent it from returning. Most mold problems in multifamily buildings start with a moisture source. We air seal, insulate, encapsulate, and install proper ventilation to address the root cause, not just the visible symptoms.
In multifamily buildings, air leakage is compounded by the stack effect. Warm air rises through stairwells, utility chases, and shared wall cavities, pulling cold air in at the base and exhausting warm air at the top. This vertical movement drives enormous energy waste in pre-1985 Chicago-area buildings.
MOLD IS A MOISTURE PROBLEM. WE FIX MOISTURE PROBLEMS.
— TREAT THE CAUSEIt's like turning on the air conditioning in your car with the windows rolled down. Insulation slows heat transfer through solid materials, but if air is moving freely through gaps, penetrations, and bypasses in the building envelope, insulation alone cannot fix the problem.
What We Seal in Multifamily Buildings
✓ Crawl space encapsulation with heavy-duty vapor barrier
✓ Air sealing of rim joists, attic bypasses, and penetrations
✓ Closed-cell spray foam insulation in moisture-critical areas
✓ Proper attic ventilation to manage moisture and heat
✓ Source identification before any treatment work begins
✓ Coordination with insulation and air sealing scopes
✓ Multifamily expertise, not just single-family solutions
— THE SCOPEHow Attic Mold Actually Forms
Mold is not random. It follows a predictable physics cycle that you can break by addressing any one stage. Understanding this is the difference between treating mold once and treating it every two years for the rest of the building's life.
Warm Air Escapes
Conditioned air from living spaces leaks upward through unsealed top plates, can lights, attic hatches, and bypasses into the unconditioned attic.
Moisture Hitches a Ride
Warm air holds far more moisture than cold air. As warm humid air rises and meets cold attic surfaces, that moisture has nowhere to go.
Condensation Happens
Vapor changes to liquid when it hits the cold underside of roof sheathing. Beads of water form on the wood, especially in winter.
Mold Feeds & Grows
Liquid water on wood creates ideal mold conditions. Black or green growth on the underside of the roof deck appears within weeks.
Address the Source. Not Just the Symptom.
A complete mold solution coordinates several scopes of work into one project. We handle every step so you do not need separate contractors for moisture management, encapsulation, and insulation.
Crawl Space Encapsulation
Heavy-duty vapor barrier installation that blocks ground moisture from entering the building envelope.
Rim Joist Air Sealing
Closed-cell spray foam at rim joists and box sills, eliminating one of the largest moisture pathways.
Attic Air Sealing & Insulation
Seal warm-air bypasses and properly insulate to eliminate condensation conditions on roof sheathing.
Proper Ventilation
Balanced ventilation design to manage residual moisture and ensure long-term building health.
Mold Surface Treatment
Affected sheathing and structural surfaces are treated after the moisture source is eliminated, not before.
Verification & Documentation
Post-project documentation that the cause has been addressed, not just the symptom covered up.
Mold problems require a building science approach. The assessment is free.