Understanding Moisture-Induced Subfloor Deflection
When relative humidity exceeds 80%, wood-decay fungi feed on the cellulose in joists and carrying girders. As joists lose compression strength, furniture weight and foot traffic cause floors to deflect downward, creating sticking doors, sloping rooms, and cracked drywall.
Hydraulic Jacking Protocol: Slow, Controlled Elevation
Lifting a house too quickly causes drywall cracking and framing stress. Our structural technicians deploy multi-point 20-ton hydraulic jacks, raising deflected floor spans in calibrated 1/8-inch increments over several hours back to true level.
Engineered LVL Lumber Sistering & Through-Bolting
Decayed floor joists are treated and reinforced by sistering full-length engineered Laminated Veneer Lumber (LVL) beams alongside existing timbers, fastened with structural adhesive and staggered high-strength through-bolts.
Heavy-Duty Galvanized Steel Screw Jack Support Piers
To replace crumbling temporary concrete block stacks, we pour solid concrete footing pads and install heavy-gauge galvanized steel screw-jack columns capable of supporting 50,000+ pounds each with lifetime adjustment capability.