Cold floors, drafts near the perimeter, and temperature swings in rooms above a crawl space can point to air leakage and heat loss at the rim joist. This area sits where the floor framing meets the exterior foundation, and small gaps can allow outside air to bypass insulation. A crawl space rim joist insulation project … Read more
Cold floors in winter and uncomfortable rooms above a crawl space can signal insulation problems, air leakage, moisture damage, or a combination of all three. Replacing insulation without finding the underlying cause can waste money and lead to another failed installation. This crawl space insulation cost guide explains how to estimate the area, compare common … Read more
When the winter temperature drops and heating bills begin to spike, homeowners frequently ask themselves: why are my floors so cold over crawl space environments? They perform standard energy audits, sealing attic hatches and window thresholds upstairs, yet they are still plagued by a persistent, freezing breeze moving across their living room rugs. In almost … Read more
Many homeowners upgrade from traditional fiberglass batts to rigid foam boards or closed-cell spray foam insulation to prevent mold and moisture tracking. While these polyurethane materials excel at blocking vapor, they introduce a distinct logistical challenge: rodent tunneling. Mice, rats, and chipmunks love the high thermal insulation properties of foam panels. They will chew their … Read more
Why Is My Crawl Space Spray Foam Turning Black? Mold vs. Burn Cracks Discovering that the clean, light-colored closed-cell spray foam insulation on your crawl space foundation walls is suddenly turning black or developing dark, splotchy stains is an alarming sight. Closed-cell spray foam is highly regarded because it is completely non-porous and acts as … Read more
Why Is Water Trapped Behind My Crawl Space Wall Insulation? During a routine home maintenance check, few things are as alarming as peeling back a sheet of rigid foam insulation board or checking a layer of spray foam along your foundation perimeter only to find hidden, pooling water dripping down the raw masonry block. When … Read more
Rigid Foam Board vs. Spray Foam: Best Foundation Wall Insulation Once you make the executive decision to encapsulate and seal your crawl space, your traditional subfloor fiberglass insulation must go. In a closed, unvented crawl space layout, insulation shifts from the underside of your floorboards directly onto the perimeter masonry foundation walls. This transforms your … Read more
How to Remove Old Crawl Space Insulation Safely (DIY Guide) If your home has traditional fiberglass batt insulation installed between the subfloor joists under your house, there is a very high probability it is doing more harm than good. In a standard vented crawl space, fiberglass acts like a massive sponge, drawing ambient moisture right … Read more
Insulating a crawl space correctly requires understanding how thermal boundaries interact with heavy subterranean humidity. For decades, residential building codes dictated stuffing fiberglass batt insulation up between structural floor joists. Today, modern building science proves that fiberglass in an unconditioned crawl space is one of the leading contributors to wood rot, saggy subfloors, and toxic … Read more