Air Sealing & Vapor Barrier Installation in Wenatchee, WA
Air sealing and vapor barriers are the two details that decide whether the rest of the insulation actually performs. L&S Contracting Services seals air leaks and installs crawl space and under-floor vapor barriers for homes, shops, and commercial buildings throughout Wenatchee, East Wenatchee, Malaga, Cashmere, Leavenworth, and the surrounding Chelan and Douglas County area.
Where buildings leak air
Most of the air leakage in a house is not spread evenly across the walls. It concentrates at a handful of spots: top plates, recessed can lights, bath and kitchen fans, plumbing and wiring chases, attic hatches, rim joists, chimney chases, and the joint between the foundation and the framing. Those leaks pull dusty attic and crawl space air into the living space, make rooms feel drafty even with plenty of insulation, and let conditioned air escape year round. We seal them with the right material for each location, then confirm the insulation above and around them is installed without gaps or compression.
Crawl space and under-floor vapor barriers
In this part of Washington a lot of homes sit over vented crawl spaces with bare dirt floors. That soil releases moisture into the crawl space year round, and that moisture ends up in the framing, the insulation, and eventually the air inside the house. A properly installed vapor barrier covers the ground, laps at the seams, and runs up and is secured at the perimeter so it stays put. We also look at the condition of the existing insulation, ductwork, and any standing water or drainage issues before we cover the ground, because a barrier over an unresolved water problem just hides it.
Verified results when the project needs them
Air sealing is easy to claim and harder to prove. When a project needs documentation, or when a builder wants confirmation before drywall, we can follow the work with a blower door test and give you a measured result instead of an assurance. For homeowners, the more common test is simply how the house feels: fewer drafts, less dust, and rooms that hold temperature more evenly.
Our work
Recent projects
FAQ
Common questions
- What does air sealing actually fix?
- It reduces the uncontrolled airflow between your living space and the attic, crawl space, and outdoors. Homeowners usually notice fewer drafts, less dust, and rooms that hold temperature more evenly.
- Do I need a vapor barrier in my crawl space?
- Most vented crawl spaces over bare soil benefit from a ground vapor barrier. We inspect the crawl space first, since standing water or drainage problems need to be addressed before a barrier goes down.
- Can air sealing be done without replacing my insulation?
- Often, yes. If the existing insulation is dry and in reasonable shape, we can seal the leaks and put it back. If it is contaminated or badly settled, removal and replacement is the better path.
- Can you verify the results?
- Yes. We perform blower door testing and can test after air sealing work when a project needs a measured result or code documentation.
Need garage door or insulation work done right?
Call 509-433-4065 or request an estimate online. Serving Wenatchee, East Wenatchee, Malaga, and the surrounding North Central Washington area.