What Homeowners Need to Know About New Requirements Across North America
Energy codes for new homes have changed significantly in recent years. Many areas across North America now require improved insulation, stronger airtightness, and a higher quality building envelope. These updates aim to create homes that are more durable, more comfortable, and more energy efficient.
Owners need to plan ahead and understand what is required to meet the energy code in their area. At Tamlin Homes we provide the structural package, including a range of window performance options so owners can select the level that meets the needs of their region, and we help point owners in the right direction. Full energy code compliance also depends on other parts of the home, such as the heating and ventilation systems, the electrical and plumbing work, the level of insulation used, and the on site construction practices completed by the builder, the owner builder, and local trades. These items must work together to meet the energy code standards set by each region.
Why Energy Codes Are Changing
Energy costs, climate goals, and the desire for long lasting buildings are driving updates to energy standards. Some regions have already made major changes, while others have changes planned for the near future.
British Columbia and Washington State are good examples of areas that recently increased their expectations. These changes include:
- Higher R value insulation
- Better performing windows
- Stronger airtightness requirements
- Independent energy modeling
- More efficient ventilation systems
- Greater use of exterior insulation
- A building envelope that reduces heat loss
In simple terms this means that homes must now be designed as a complete system instead of relying on basic minimums.
Understanding Insulation Choices
Batt Insulation
Batt insulation (fiberglass or mineral wool) is installed between studs and is cost-effective when properly fitted. Typical batt insulation provides R-13 to R-21 in standard 2×4 or 2×6 walls, with higher values available for thicker assemblies.
Spray Foam Insulation
Spray foam expands to fill gaps and delivers both insulation and strong air sealing. Open-cell spray foam is about R-3.5 to R-4 per inch, while closed-cell spray foam is about R-6 to R-7 per inch, making it one of the highest-performing insulation options.
Zip System Sheathing + Insulation
ZIP panels combine structural sheathing with a built-in weather barrier and optional exterior foam insulation (ZIP-R). When seams are taped, they create a tight, energy-efficient exterior. ZIP Sheathing alone has no R-value, but ZIP-R insulated panels provide roughly R-3.6 to R-12.6 depending on the foam thickness.
SIP Panels
SIP panels are factory-made wall or roof panels with a solid foam core sandwiched between structural sheathing. They offer high insulation and excellent airtightness, with typical values of R-24 to R-40 depending on thickness.
Pre-Insulated Wall Panels
Pre-insulated wall panels are factory-built structural panels designed for high energy performance. Using expanded polystyrene insulation, they provide consistent thermal values from approximately R-22 to R-36 depending on panel thickness. Because they are precision-built in our controlled environment, the panels help achieve excellent airtightness and reduce heat loss across the entire building envelope.
Below are examples of recent updates in different regions to show how these changes may affect new home construction
These changes make early planning essential especially when selecting wall systems, windows, and envelope components that support strong and consistent performance.
Other Regions Are Updating as Well
These examples reflect a broader trend. Many provinces and states across North America are adopting stronger requirements. Understanding the expectations in your region early in the design phase helps prevent delays and avoids costly redesigns.
British Columbia
British Columbia continues to expand the BC Energy Step Code which sets measurable performance targets for new homes. The Step Code is a tiered system that gradually increases energy performance requirements for new homes. Important updates include:
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As of May 2023, most new homes must be about twenty percent more energy efficient than the previous code
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Many regions now require Step Three which means better insulation, tighter construction, high performance windows, and reduced heat loss
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Some municipalities have already moved to Step Four or Step Five depending on building type
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The Zero Carbon Step Code is being introduced which focuses on reducing greenhouse gas emissions from new homes
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New HVAC requirements are being introduced across BC to improve heating and ventilation efficiency
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Compliance often requires energy modeling, blower door testing, and support from certified energy advisors
In simple terms homeowners now need a stronger building envelope with careful attention to insulation, airtightness, and overall construction quality.
Washington State
Washington now uses the 2021 Washington State Energy Code for new residential permits. This code has some of the strongest requirements in the northwest region. Key changes include:
- Homes must achieve stronger air leakage control with testing required to confirm the result. Stricter airtightness targets improve energy efficiency and indoor comfort.
- The code requires increased levels of continuous exterior insulation for many wall assemblies in order to reduce thermal bridging. This is a key change for builders who previously relied on cavity insulation alone.
- Windows and doors must meet more advanced energy performance ratings which improve overall heat loss control and reduce drafts.
- Mechanical ventilation systems must be more efficient and better balanced to support indoor air quality and consistent heating and cooling performance.
- Many builders now follow a performance path rather than a prescriptive path which means the entire home must meet an overall energy target rather than relying on a checklist of minimum values.
- Inspectors may require separate inspections for different parts of the insulation system including both exterior continuous insulation and interior batt or blown in insulation.
How Tamlin Helps You Navigate Local Energy Codes
Energy codes can vary widely between provinces, states, and even individual municipalities. For many homeowners, understanding what applies to their specific building site can feel overwhelming. This is where Tamlin’s expertise makes a real difference.
At Tamlin Homes we do not interpret or verify local energy codes. Instead, we help point owners in the right direction so they can confirm the requirements for their location. We explain which parts of the energy code relate to the house package we supply and which items should be reviewed with local officials or certified professionals.
When we believe a homeowner would benefit from working with an energy expert, we let them know early in the process. Connecting with the right professional can streamline the approval process and help prevent delays in obtaining permits. Our goal is to provide the house package and support owners with the information they need to navigate their local energy requirements with confidence.
What Is an Energy Advisor?
An energy advisor is a trained and certified professional who helps ensure a new home meets local energy code requirements. They review the building plans, complete energy modeling when needed, and guide owners, builders, and designers through what is required for permits.
Expert Guidance Through Design and Permitting
Tamlin helps owners select the prefabricated house package components and window options that support the energy code requirements for their location. Owners then work with their builder and local officials, and with an energy advisor if needed, to confirm full compliance. Early planning helps avoid delays and keeps the project moving smoothly from design to completion.
A Future Ready Building Envelope
Homes built to modern standards typically offer:
- Greater comfort
- Lower energy costs
- Better long-term durability
- Reduced noise
- Improved resale value
A well-insulated and airtight building envelope is the foundation of a comfortable and efficient home.
Build an Energy Efficient Home with Confidence
Whether your region recently updated its energy code or is preparing for future changes, Tamlin Homes provides the prefabricated systems and expert support you need to build with confidence.
If you are planning a new home and want expert guidance through your local energy code requirements, contact Tamlin today. Our team is here to help at every step.
