Starting July 1, 2026, the Model Low Energy and Carbon Code (MLECC) significantly tightens window performance standards for residential projects across most Colorado jurisdictions. These updates focus on specific efficiency metrics to reduce carbon emissions and heat transfer.
Key requirements and jurisdictional differences include:
- Denver, Centennial, and Unincorporated Arapahoe County: These areas have the most stringent requirements. Windows must achieve a U-value of 0.30 or lower and a Solar Heat Gain Coefficient (SHGC) of 0.25 or lower.
- Colorado Springs: This jurisdiction has delayed full adoption until 2027 and maintains slightly more flexible thresholds, requiring a U-value of 0.35 and an SHGC of 0.30.
- Energy Star Alignment: The new thresholds are designed to align with the Energy Star window requirements 2026 Colorado standards. Selecting high-performance products, such as fiberglass windows, helps meet these benchmarks.
- Tax Credit Eligibility: Homeowners who install windows meeting these heightened standards may become eligible for the Energy Star Most Efficient 2026 tax credit, helping to offset the cost of high-performance upgrades.
Related FAQs
-
When should a Contractor or Homeowner Seek a Professional Foundation Inspection for a New Property?
Read More »: When should a Contractor or Homeowner Seek a Professional Foundation Inspection for a New Property?While minor movement is a normal part of the settling process for a new home—typically resulting in hairline cracks under 1/8 inch—certain indicators demand an immediate professional evaluation. In Centennial, CO, our expansive clay soils and moisture fluctuations can accelerate…
-
How can I Distinguish between Normal, Harmless Settling in a New Build and Problematic Structural Movement?
Read More »: How can I Distinguish between Normal, Harmless Settling in a New Build and Problematic Structural Movement?Distinguishing between normal settling and structural movement is vital for homeowners, especially in Centennial, CO, where expansive clay soils are common. While some movement is expected during the first year of a new build, the severity and shape of cracks…
-
Do Sticking Doors and Windows in a New Home Always Indicate Significant Foundation Settlement?
Read More »: Do Sticking Doors and Windows in a New Home Always Indicate Significant Foundation Settlement?No, sticking doors and windows do not always indicate a significant problem. In a newly built home, some sticking is considered a normal part of the initial settling process as the structure acclimates to its environment, particularly during the first…
-
How do Engineers Calculate the Ultimate Geotechnical Capacity of a Helical Pile?
Read More »: How do Engineers Calculate the Ultimate Geotechnical Capacity of a Helical Pile?To calculate the ultimate geotechnical capacity of a helical pile, our engineers utilize three complementary approaches that combine soil mechanics theory with real-world field verification: We always apply a safety factor—typically between 2.0 and 3.0—to these ultimate capacity results to…
-
Does the Water Table Level Affect the Soil Bearing Capacity for Helical Piers?
Read More »: Does the Water Table Level Affect the Soil Bearing Capacity for Helical Piers?Yes, the water table level significantly influences soil bearing capacity for helical piers. Groundwater conditions can alter the engineering properties of the soil, which our team must account for during both the design and installation phases. Saturated soils experience reduced…
