Energy-efficient solutions for windows in new Lithuanian project houses

Energy-efficient solutions for windows in new Lithuanian project houses

New residential projects in Lithuania increasingly prioritize energy efficiency — driven by both regulation and buyer expectations. Windows are a critical part of a building’s energy balance: frame quality, glazing, and installation determine heat loss, condensation risk, and acoustic comfort.

What makes a window energy-efficient?

• A multi-chamber PVC frame with low thermal conductivity.
• High-performance insulating glass units: multiple panes, Low‑E coatings, inert gas fills (argon, krypton).
• Warm‑edge spacers and durable seals.
• Professional installation that eliminates thermal bridges and controls moisture flow.

Technical solutions used in the project

PVC profiles with 5–7 chambers

Modern 5–7 chamber profiles provide a good balance between cost and thermal performance. For Baltic projects, choose frames that meet or exceed local U‑value requirements for residential buildings.

Insulating glass units: configuration and fills

Triple-glazed or high-performance double-glazed units with Low‑E coating and argon fill significantly reduce the U‑value. For north-facing façades, Low‑E + argon is recommended; for south-facing glazing, consider higher solar gain where beneficial.

Warm edge spacers

Replacing aluminium spacers with warm edge alternatives reduces edge condensation and increases overall thermal performance of the IGU.

Airtightness and installation

Proper installation is as important as the product itself. Correct vapor and water barriers, appropriate insulation materials and foam applied per best practice reduce thermal bridging. For high-performance projects, carry out thermal imaging to verify installation quality.

Comfort and solar control

Energy efficiency also includes managing summer overheating. Integrate shading systems (external roller shutters, external blinds, integrated slats) to maintain comfort and lower cooling demand.

Economics and payback

Investing in higher-grade glazing and frames pays off through reduced heating costs and improved building performance. Typical payback periods range from 5 to 12 years depending on climate, energy prices and installation quality.

Practical recommendations for developers and residents

• Specify profiles with proven thermal resistance.
• Prefer glass units with Low‑E coatings and argon fills, especially for cold exposures.
• Ensure installation quality: sealed joints, vapor control, no gaps.
• Plan shading for south- and west‑facing windows.
• Schedule regular maintenance of seals and moving parts.

Manufacturer’s tip: correct specification and installation reduce complaints and improve resident satisfaction.

Frequently Asked Questions (FAQ)

1. What glass unit is best for the Lithuanian climate?

A double or triple glazing with Low‑E coating and argon fill is recommended. Triple glazing offers extra thermal and acoustic benefits for colder exposures.

2. Is a warm edge spacer necessary?

Yes — warm edge spacers minimize condensation at the glass edge and improve the thermal performance of IGUs.

3. How to check installation quality?

Visual inspection of joints and seals, operational checks on fittings, and, if needed, thermal imaging in cold conditions.

4. Exterior or interior shading — which is better?

Exterior shading is more effective at stopping solar heat gain before it enters the room; interior shading is primarily for comfort and aesthetics.

Conclusion

In modern Lithuanian projects, energy-efficient windows mean the right combination of frame, glazing and installation. A holistic approach reduces heat loss, increases comfort and lowers operating costs. When specifying windows, consider orientation, acoustic needs and long-term maintenance to get the best results.