Crawlspace Encapsulation & Repair in Lakewood, CO

Lakewood's Mid-Century Ranches and the Vapor Barrier Problem

Lakewood is home to one of the highest concentrations of mid-century ranch homes in the Denver metro area. The Colfax Corridor and the Belmar neighborhood — along with surrounding streets — contain thousands of homes built in the 1950s and 1960s, a period when single-family suburban development was expanding rapidly along the western edge of Denver. These homes were built quickly, using the construction standards and materials of their era, and their crawlspaces reflect every limitation of that approach.

The most prevalent crawlspace problem in Lakewood is the single-thickness vapor barrier — a single layer of 4-mil or 6-mil polyethylene laid across the crawlspace floor without seaming tape, overlap fastening, or wall attachment. In the 1950s and early 1960s, this was considered adequate vapor protection. By modern standards, this approach provides vapor resistance of approximately 0.4 perms — 20 times higher than the 0.02-perm rating of the 20-mil reinforced systems we install today. That difference is not academic: it means 20 times more water vapor migrates through the barrier into the crawlspace environment every day.

Many Lakewood homeowners we work with have lived in their homes for decades and have never had the original vapor barrier replaced. After 40 to 60 years, that barrier is no longer functioning as designed. It has been walked on during multiple HVAC and plumbing service visits, attacked by mice and insects, shifted by ground movement, and degraded by UV exposure during the original installation process. What remains is often a patchwork of fragmented plastic with large exposed soil sections.

Belmar Area: High Moisture and Close Foundations

The Belmar neighborhood in central Lakewood contains a mix of mid-century original homes and some post-2000 infill construction. The original homes in this area tend to have relatively shallow crawlspaces — sometimes as little as 18 to 24 inches of clearance — that make access difficult but also create elevated moisture conditions. In shallower crawlspaces, the soil surface is closer to the floor framing, shortening the distance that water vapor must travel before it contacts wood surfaces and condenses.

The soil in the Belmar area and along the Colfax Corridor is predominantly a loam-clay mix that holds moisture persistently after snowmelt and spring rains. Lakewood's proximity to Green Mountain and the Bear Creek drainage system means that snowmelt from the western slopes reaches these neighborhoods in concentrated volume each spring, saturating soils for weeks.

High Moisture Issues in Lakewood Crawlspaces

We classify Lakewood as a "high moisture issue" area for crawlspaces based on four converging factors: age of housing stock (60+ years in many cases), soil moisture retention characteristics, original barrier condition (typically degraded single-thickness), and the construction characteristics of mid-century ranches that make vapor management more difficult.

In a high-moisture crawlspace like those common in Lakewood, a standard vapor barrier replacement alone is often not sufficient. The moisture load requires a complete encapsulation system — vapor barrier, sealed vents, wall insulation, and a properly sized dehumidifier — to achieve and maintain the target of 50% relative humidity or lower. We specify the dehumidifier capacity for each Lakewood project based on measured humidity levels and crawlspace square footage, not on a standard product recommendation.

Mid-Century Ranch Construction Specifics

Mid-century ranch homes in Lakewood share several construction characteristics that affect crawlspace work:

Wide, Open Floor Plans: Mid-century ranch design favored open living areas, which required longer beam spans with fewer interior walls. These spans rely on central beams with intermediate support posts. After 60 years, some of these beams show deflection from inadequate support post spacing, moisture absorption, or both. We assess central beam condition in every Lakewood inspection.

Original Asphalt Siding and Shallow Footings: Some of Lakewood's oldest homes have original footings that extend only a few inches below grade — marginally compliant with the frost depth requirements at the time, but potentially insufficient by modern standards. We note footing depth observations and discuss implications with homeowners when relevant.

Older HVAC Ductwork: Many Lakewood ranches have original ductwork running through the crawlspace. Older flex duct or galvanized sheet metal ducts in a humid crawlspace accumulate condensation and can develop leaks that deliver conditioned air into the crawlspace rather than to the living space. We note duct condition during our assessment.

Services Available in Lakewood

• Full Encapsulation: Complete 20-mil vapor barrier system with vent sealing, wall insulation, spray foam rim joist sealing, and altitude-rated dehumidifier.
• Single-Thickness Barrier Replacement: Removal of original single-thickness polyethylene and installation of 20-mil reinforced system with proper seaming and wall attachment.
• Mold Remediation: Complete mold removal from framing and insulation with EPA-registered treatment and HEPA containment.
• Insulation Replacement: Removal of failed fiberglass from floor joists, rigid foam wall installation, spray foam rim joist sealing.
• Structural Repair: Central beam assessment and Smart Jack supplemental support for Lakewood ranch floor sag.