Summerland Step Code & AeroBarrier Air Sealing

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

Why Summerland Builders Should Care About Air Sealing

Summerland sits in the heart of BC wine country between Penticton and Peachland, and its residential construction market has been growing steadily. With vineyard-view customs, hillside infills, and agricultural-lot homes, the District of Summerland sees a healthy mix of new builds each year. Every one of those projects must meet BC Energy Step Code 3 requirements, including a mandatory airtightness target of 2.5 ACH50.

Airtightness is not optional. It is a measured, pass-or-fail metric verified through a blower door test before occupancy. If your home leaks more than 2.5 air changes per hour at 50 pascals of pressure, you do not get your occupancy permit. Period.

Summerland’s Climate Zone 5 Advantage

Summerland benefits from being slightly warmer than Kelowna, with hot, dry summers and moderate winters for Climate Zone 5. Heating degree days are lower than northern Okanagan communities like Vernon or Salmon Arm, which means your energy model results tend to be more forgiving.

That said, do not confuse a warmer climate with easier air sealing. The 2.5 ACH50 target does not change based on temperature. A house in Summerland must be sealed to the same standard as one in Kamloops or Merritt. The climate advantage shows up in insulation and mechanical sizing, not in the blower door test.

Common Construction Types in Summerland

Summerland’s building landscape includes:

• Hillside custom homes with walk-out basements on sloped lots, common along Giant’s Head and the benches above Highway 97
• Agricultural land residence (ALR) homes on larger rural lots with attached garages and workshops
• Infill ranchers and two-storey homes in established neighbourhoods near the town centre
• Lakefront and near-lake builds closer to Okanagan Lake on the west side of the district

Each of these building types presents distinct air sealing challenges. Walk-out basements mean complex foundation-to-wall transitions. ALR homes often have larger footprints with more penetrations for mechanical systems. Lakefront builds face wind exposure that stresses air barrier connections.

How AeroBarrier Works for Summerland Builders

AeroBarrier is an automated air sealing system that pressurizes your home and injects a water-based, non-toxic sealant mist that finds and fills gaps from the inside. It is applied after rough-in and before drywall, during the same window when you would typically schedule a pre-drywall blower door test.

The process takes 2-4 hours for a typical Summerland single-family home and can achieve airtightness levels well below 2.5 ACH50. Most AeroBarrier-sealed homes reach 1.0-1.5 ACH50, which positions your project for Step Code 4 compliance and unlocks significantly higher FortisBC rebates.

For builders working on hillside lots with complex geometry, AeroBarrier eliminates the guesswork. Instead of hoping your tape, caulk, and spray foam details hold up to 2.5 ACH50, you watch the number drop on screen in real time.

Air Sealing Methods Compared

Traditional air sealing methods rely on a combination of house wrap, tapes, gaskets, caulking, and spray foam applied at every joint, penetration, and transition. This approach works, but it is labour-intensive and depends entirely on the quality of installation across dozens of individual details.

AeroBarrier does not replace your air barrier strategy. It supplements it. Think of it as insurance for the seams your crew inevitably misses. The result is a measurable, verifiable airtightness level achieved before drywall goes up, giving you time to address any remaining issues.

FortisBC Rebates for Summerland Projects

Summerland is served by FortisBC for both electricity and natural gas, making builders eligible for substantial rebates:

• Step 3 compliance at 2.5 ACH50: baseline requirement, no bonus rebate for meeting minimum
• Step 4 compliance at 1.5 ACH50: up to $15,000 through FortisBC rebate programs
• Step 5 compliance at 1.0 ACH50: up to $20,000 in combined rebates

For multi-unit projects like duplexes or triplexes, rebates apply per dwelling unit. A duplex built to Step 4 could receive $30,000 in total rebates, often covering the full cost of upgraded air sealing and mechanical systems.

Use our Step Code calculator to estimate rebate potential for your specific Summerland project.

Achieving Your ACH Target

Hitting ACH targets in Summerland starts with planning. Work with your energy advisor before framing begins. Key focus areas include:

1. Foundation-to-wall transition — the most common failure point in Okanagan construction
2. Rim joist sealing — especially on walk-out basement designs common on Summerland’s hillside lots
3. Window and door rough openings — proper flashing and backer rod plus sealant at every opening
4. Mechanical penetrations — plumbing vents, electrical panels, HRV ducting, and range hood exhausts
5. Top-of-wall to ceiling connection — where interior partition walls meet the top plate

Permit Process

Summerland follows the standard BC Energy Step Code permit process:

1. Pre-construction: Energy advisor creates the HOT2000 energy model and produces a design-stage compliance report, submitted with your building permit application
2. Mid-construction (recommended): Pre-drywall blower door test to verify airtightness before closing up walls. This is your safety net
3. As-built (required): Final blower door test at or below 2.5 ACH50 and as-built compliance report, required before occupancy permit is issued

Frequently Asked Questions

What Step Code level is required in Summerland?

Step 3 is currently required for all new Part 9 residential buildings in the District of Summerland. This means a maximum airtightness of 2.5 ACH50, verified by a blower door test. Higher steps are voluntary but unlock FortisBC rebates worth up to $20,000 per dwelling unit.

How much does AeroBarrier cost in Summerland?

AeroBarrier pricing for Summerland projects varies based on home size and target ACH. For a typical 2,000-2,500 sq ft home targeting Step 3, expect to invest between $3,500 and $5,500. For tighter targets like Step 4 at 1.5 ACH50, costs may be slightly higher but are often offset by FortisBC rebates.

Do I need a pre-drywall blower door test?

A pre-drywall test is not mandatory in Summerland, but it is strongly recommended. If your final test fails at 2.5 ACH50, you are looking at cutting open finished walls to fix air leaks. A pre-drywall test costs a few hundred dollars and can save thousands in remediation. AeroBarrier is applied at the pre-drywall stage and includes a blower door test as part of the process.

Can I use AeroBarrier on a hillside walk-out basement?

Yes. Walk-out basements are one of the most common building configurations in Summerland, and they are also one of the most challenging for air sealing due to the complex foundation-to-wall transitions. AeroBarrier handles these transitions effectively because the sealant mist finds gaps regardless of geometry.

What is the difference between Step 3 and Step 4?

Step 3 requires 2.5 ACH50 airtightness. Step 4 tightens that to 1.5 ACH50 and requires higher overall energy performance. The jump from 2.5 to 1.5 ACH50 is significant, but FortisBC offers up to $15,000 in rebates for Step 4, making the additional investment worthwhile for many Summerland builders.

How do I book AeroBarrier in Summerland?

Call us at 250-864-8727 or get a free consultation. Okanagan AeroBarrier Inc. serves all of the Okanagan Valley including Summerland, Penticton, Peachland, and surrounding communities. We typically need 2-3 weeks lead time to schedule your seal date.

Ready to Hit Your ACH Target?

Whether you are building a vineyard estate on the benches or an infill rancher in the town centre, air sealing is the one detail that determines whether your project passes or fails the blower door test. Okanagan AeroBarrier Inc. works with builders across Summerland and the southern Okanagan every week.

Call us at 250-864-8727 or get a free consultation.