Icynene Crawl Space Encapsulation & Vapor Barrier Nationwide | Walt’s Insulation

Icynene Crawl Space Encapsulation & Vapor Barrier in West Hollywood: What to Know First

Icynene spray foam in a West Hollywood crawl space usually fails because of one of two things: the original install didn’t account for our marine-layer humidity, or the vapor barrier underneath was an afterthought. We fix both. Most Icynene crawl space encapsulation jobs in West Hollywood run $3,200 to $8,500 depending on square footage and how much of the old barrier needs removal, and we can typically get started within 3 to 5 days. If you own a home with Icynene foam and you’re dealing with damp smells, sagging insulation, or a vapor barrier that’s torn to shreds, this page is for you. Call (213) 527-4062 and you’ll get a live person, day or night.

Call (213) 527-4062

Key takeaways:

• We’re an independent Icynene service provider. We fix what’s there; we don’t push replacement unless it’s genuinely shot.
• West Hollywood’s humidity and older pier-and-beam foundations create specific failure patterns we see weekly along Santa Monica Boulevard and in the flats near Melrose.
• Every job carries our lifetime Done Right Promise. If it’s not done right, we make it right.
• Free estimates. No trip charge inside our service county. Seniors and veterans always get 10% off.

How Icynene Products Fail - and How We Fix Them

West Hollywood homes tell us the same story over and over: the Icynene was sprayed, the vapor barrier was an afterthought, and five years later the crawl space smells like a wet basement. Here’s what we actually find under the houses we work on.

• Open-cell Icynene (Classic and ProSeal) soaking up moisture. Open-cell foam is a sponge when exposed to standing crawl space humidity. In West Hollywood, where the marine layer pushes moisture into the soil from May through August, open-cell Icynene applied directly against the subfloor wicks that moisture upward. We find it sagging, heavy, and discolored. The fix: remove the saturated sections, seal the ground with a proper vapor barrier, and reapply closed-cell or encapsulate the space entirely.
• Icynene ProSeal LE delaminating from rim joists. The low-expansion formula is great for tight spots, but it doesn’t bond well to damp wood or old paint. In older West Hollywood homes, particularly the 1920s and 1930s stucco bungalows near Fairfax, rim joists hold decades of moisture. The foam peels away in sheets. We strip it, dry the framing, and reapply with proper surface prep, primer where needed.
• Icynene Classic shrinking at the sill plate. This is a non-catalog failure but a real one. Open-cell Icynene installed in thick lifts can shrink up to 2% as it cures, and on the sill plate that 2% opens a direct air gap to the crawl space. Homeowners see the foam pulling away from the wood edge. We backfill those gaps with closed-cell Demilec or seal with mastic and backing rod, then verify with a blower door if you want the full picture.
• Rodent tunneling through vapor barriers over Icynene. Rats and mice love the warmth of Icynene foam. Once a vapor barrier gets a single tear, rodents turn the space between barrier and foam into a highway. We regularly pull back barriers in West Hollywood crawl spaces and find tunnels straight through the foam. Our process includes rodent-proofing: sealing entry points with steel mesh and replacing damaged foam sections, then laying a fresh, reinforced barrier.
• Missing vapor barrier entirely. A surprising number of Icynene installs in West Hollywood never had a ground cover at all. The builder or previous homeowner thought the spray foam alone would handle moisture. It won’t. Ground moisture rises through the soil, hits the foam, and condenses. If you have Icynene with exposed dirt under the house, that’s your damp smell right there. We install a 10-mil or 12-mil reinforced barrier, seam-sealed and secured to the foundation piers, with all edges mechanically fastened.

Our Icynene Crawl Space Encapsulation & Vapor Barrier Process

Here’s exactly what happens when you call us about your West Hollywood crawl space. We’ve done enough of these that nothing surprises us anymore, but we don’t cut corners either.

1. 1
   Phone call and site history. You reach a live person, often Walt himself. We ask about your home’s age, when the Icynene was installed, and what you’re seeing: smells, moisture on vents, sagging foam, pest activity. If you have the original installer’s paperwork, keep it handy.
2. 2
   Crawl space inspection. We schedule a visit within a few days. Our tech enters the crawl space, photographs everything, tests moisture levels with a meter, and maps every failure point. You get the photos and a straight explanation. No sales pitch, no fear tactics.
3. 3
   Parts and materials decision. For foam repair, we use Icynene-compatible materials where the existing foam is sound, and we name our sources. For vapor barrier, we use 10-mil or 12-mil reinforced polyethylene from trusted suppliers, mechanically fastened, not taped-and-hoped. Where Icynene open-cell needs removal and replacement, we may switch to a closed-cell product like Demilec for better moisture resistance. We’ll tell you why before we do it.
4. 4
   The work itself. We remove failed foam and old barrier, address moisture at the source, seal and rodent-proof, and install the new barrier and any new foam. Our crew is background-checked and uniformed. You’ll know exactly who’s under your house.
5. 5
   Verification. Before we leave, we re-test moisture levels, check every seam with a flashlight, and walk you through what we did. If you opted for a blower door or thermal scan, we review those results with you too.
6. 6
   Done Right Promise. Every job is covered for life on workmanship. If something we did fails, we come back and fix it. No runaround, no fine print. That’s the whole point of the Promise.

What Icynene Crawl Space Encapsulation & Vapor Barrier Costs in West Hollywood

Here are honest numbers for typical West Hollywood jobs, based on what we’ve quoted and completed in the area. Every home is different, so treat these as starting points, not final bids.

• Vapor barrier only (existing Icynene in decent shape): $1,800 to $3,400 for a standard 800 to 1,200 square foot crawl space. Includes old barrier removal, ground prep, and 10-mil reinforced barrier with sealed seams.
• Full encapsulation with dehumidifier: $5,500 to $9,000. Includes barrier, foundation wall coverage, sealing vents if applicable, and a properly sized dehumidifier. West Hollywood’s humidity makes this a common and worthwhile upgrade.
• Foam repair plus vapor barrier: $3,200 to $6,500 when sections of Icynene need removal and replacement. Open-cell removal is labor-intensive; the price moves based on how much foam is saturated.
• Rodent damage remediation add-on: $400 to $1,800 depending on entry point work and foam replacement volume. Steel mesh exclusion is standard; no traps left under your house.

What moves the price: crawl space height, access (some West Hollywood lots have tight side yards or low clearance), square footage, foam condition, and whether you want a dehumidifier. Call (213) 527-4062 for an exact quote. Estimates are free, and we’ll give you a straight answer even if you just need a second opinion on someone else’s bid.

Why West Hollywood Homeowners Call Walt’s Insulation for Icynene Work

We’ve been doing this since 2000. Walt Brenner started this company after learning the trade at San Antonio College, and he’s been the one answering the phone most days since. That’s not a marketing line; it’s just how we run things. The one down the road knows your neighborhood, knows the soil conditions under the houses off Santa Monica Boulevard, and knows what happens when Icynene gets wet. We’re locally owned, owner-operated, with a published address and license number. Not a franchise. Not an 800 number.

If your crawl space has Icynene but the moisture barrier was never done right, or the foam has failed at the rim joists, or rodents have turned your insulation into their living room, we’re the crew to call. We also work with Reflectix radiant barrier when a job calls for it, and we install products from Owens Corning, Rockwool, Johns Manville, CertainTeed, Demilec, Knauf, and GreenFiber. The brand on the can matters less than the person holding the gun. And we do the job right the first time - because coming back to fix it isn’t good for either of us.

Every job includes upfront pricing, free estimates, no trip charge inside our county, $40 off any repair over $200, and a permanent 10% discount for seniors and veterans. Calls are answered by a live person 24/7. Not a voicemail. Not an answering service. A person who actually knows crawl spaces.

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