Lumby Step Code & AeroBarrier Air Sealing

Current Step: 3 | ACH Target: 2.5 ACH50 | Climate Zone: 5 | Permit Office: lumby.ca

About Lumby

Lumby is a village of approximately 1,900 people in the Monashee corridor, about 25 kilometres east of Vernon via Highway 6. Surrounded by forested hills and agricultural land, Lumby attracts buyers looking for rural living with reasonable access to North Okanagan services. The community sits at the gateway to the Monashee Mountains, with Mabel Lake and Cherryville further up the valley.

Residential construction in Lumby tends toward custom homes on larger parcels, reflecting the area’s rural character. Despite its small size, builders here face the same Step Code requirements as any BC municipality.

Current Step Code Requirements

Lumby requires Step 3 for all new Part 9 residential construction:

• Energy model using Climate Zone 5 weather data
• Blower door test confirming 2.5 ACH50 or better
• Design-stage and as-built compliance reports

Lumby’s climate is slightly colder than Vernon’s, with its position in the Monashee corridor exposing it to cold air drainage from higher elevations. Builders should work with energy advisors familiar with the local microclimate to make sure their models reflect actual conditions.

Construction Patterns in Lumby

Lumby’s building activity has its own character:

• Custom homes on acreages with basements or crawlspaces
• Log and timber-frame homes reflecting the rural mountain setting
• Practical family homes built by owner-builders or small local contractors
• Workshop-and-house combinations where residential and shop space share a building envelope

Each of these presents specific air sealing considerations. Log and timber-frame construction is particularly challenging because the settling of logs over time can open new air leakage paths. Custom homes on acreages often have complex footprints with multiple rooflines, bump-outs, and mechanical penetrations for wood stoves, generators, and well pumps.

Air Sealing Challenges in Rural Construction

Builders in Lumby encounter several challenges that are less common in urban subdivisions:

• Wood stove and chimney penetrations — nearly every Lumby home has a wood stove, and the flue penetration through the envelope is a significant air leakage point
• Multiple mechanical penetrations for well pumps, septic venting, propane lines, and backup generators
• Larger building footprints with more linear feet of rim joist to seal
• Attached shops and garages that create complex air barrier transitions
• Crawlspace construction on sloped sites, requiring careful floor-to-foundation sealing

Traditional air sealing methods can address each of these individually, but the sheer number of penetrations in a rural custom home makes it easy to miss a few — and a few missed spots can mean the difference between passing and failing a blower door test.

How AeroBarrier Solves the Problem

AeroBarrier takes a different approach. Instead of sealing individual leaks by hand, the system pressurizes the home with a blower door and aerosolizes a water-based acrylic sealant inside. Air pressure naturally drives the sealant particles toward every opening in the envelope, sealing gaps as small as a human hair.

For Lumby’s rural builds, AeroBarrier offers:

• Comprehensive sealing that catches every penetration, even ones buried inside framing cavities
• Real-time ACH50 display during application — you watch the number drop as sealing progresses
• No missed spots because the pressurized air does the work of finding leaks
• Single-day application that keeps your build schedule on track
• Works on complex homes including those with multiple rooflines, attached shops, and non-standard layouts

Okanagan AeroBarrier Inc. services Lumby as part of our regular North Okanagan route. The village is a short drive from Vernon, and we frequently batch projects in the Lumby-Coldstream-Vernon corridor.

FortisBC and Energy Incentives

Lumby is within FortisBC service territory for natural gas. New homes meeting or exceeding Step Code performance targets can access FortisBC rebates. For custom home builders managing tight budgets, these rebates help offset the investment in high-performance construction.

Some Lumby properties may use propane or electric heat rather than natural gas. The Step Code requirements and AeroBarrier application are the same regardless of heating fuel; only the rebate eligibility may differ. Check our rebate calculator for specifics.

Planning for Step 4

BC is moving toward Step 4 requirements, which will tighten the ACH target to 1.5 ACH50. Builders who are already achieving 2.0 or better with AeroBarrier today are well positioned for the transition. If you’re building a custom home in Lumby that will be your forever home, targeting Step 4 performance now means a more comfortable, efficient house for decades to come.

Nearby Communities

Builders in the Lumby area often also work in:

• Vernon — 25 minutes west, the North Okanagan hub
• Coldstream — between Lumby and Vernon, rural-residential district
• Armstrong — north on Highway 97A
• Enderby — further north along the Shuswap River

All share CZ5 Step 3 requirements with the same 2.5 ACH50 target.

Frequently Asked Questions

Does Lumby have its own building permit office?

The Village of Lumby processes building permits for properties within village limits. Properties outside the village boundary fall under the Regional District of North Okanagan (RDNO). Step Code requirements apply under both jurisdictions.

Can AeroBarrier work on log or timber-frame homes?

AeroBarrier works on any construction type where the envelope can be pressurized. For log homes, it’s typically applied to the portions of the envelope that use conventional framing (gable ends, interior partition walls to exterior, etc.). The log wall sections themselves need their own sealing strategy, but AeroBarrier can address the many transitions between log walls and conventional framing.

How does a wood stove affect my blower door test?

The wood stove flue is a significant penetration through the envelope. During a blower door test, the flue damper is closed, but the penetration through the ceiling and roof still needs proper air sealing around the chase. AeroBarrier seals around these penetrations automatically during application.

Is AeroBarrier appropriate for a small home or cabin?

Yes. AeroBarrier works on buildings of all sizes. Smaller homes often have proportionally more leakage per square foot because they have a higher surface-area-to-volume ratio. AeroBarrier is an efficient way to seal a small build and confirm compliance in a single visit.

What if I’m an owner-builder with limited construction experience?

AeroBarrier is especially valuable for owner-builders because it removes the need for expert-level manual air sealing skills. The system does the finding and sealing automatically. You still need proper rough-in work completed before application, but the air sealing step itself is handled by our trained crew.

How do I get a quote?

Call us at 250-864-8727 or get a free consultation. Send us your floor plans and we’ll provide a quote within 24 hours. Okanagan AeroBarrier Inc. — hello@okaerobarrier.com

---

Ready to hit your ACH target in Lumby? Call us at 250-864-8727 or get a free consultation. Okanagan AeroBarrier Inc. — hello@okaerobarrier.com