Which profiles are best for the new Lithuanian project

Which PVC profiles are best for the new Lithuanian project

Choosing the right window profile for a new project in Lithuania requires balancing thermal performance, durability, sound insulation and installation quality. This guide explains the technical parameters to prioritize, suggested profile depths, glazing options and practical tips for architects, builders and developers.

1. Climate-related requirements

• Lithuania has cold winters and variable humidity — low heat transfer (Uw) is essential.
• Preventing condensation and ensuring airtight installation are priorities.
• Compliance with European standards and CE marking is mandatory.

2. Profile depth and chamber design

• Recommended profile depths: 70–90 mm. A 70 mm profile suits most new-builds; 80–90 mm provides extra thermal mass and space for thicker glazing.
• Chamber count: at least 5 chambers in the frame for effective thermal separation.

3. Thermal performance and glazing

• Look at the profile Uf value and combine with triple glazing to reach Uw targets (commonly ≤ 0.9–1.2 W/m²K for energy-efficient buildings).
• Warm-edge spacers, Low-E coatings and gas fills (argon or krypton) significantly improve glass unit performance.

4. Reinforcement and structural stability

• Reinforcement with galvanized steel or modern composite inserts is necessary for wide openings and larger sashes.
• Check the thickness and corrosion protection of reinforcement.

5. Acoustic insulation

• For urban or roadside sites choose triple glass units with asymmetric glass thicknesses and gas fillings — typical results range Rw 34–46 dB depending on configuration.

6. Hardware and ventilation

• Multi-point locking, micro-ventilation options, child safety and anti-burglary features are important for safety and comfort.
• In high-humidity spaces, controlled ventilation combined with window inlet options helps avoid mould and condensation.

7. Installation and sealing

• Proper installation is as crucial as the profile itself: correct alignment, three-layer sealing (internal vapour barrier, insulation, external weather barrier) is recommended.
• Typical installation gap: 10–20 mm with PU foam and sealing tapes.

8. Cost vs performance

• 70 mm profiles with triple glazing offer the best price-to-performance ratio for many projects.
• 80–90 mm profiles and premium glazing increase costs by 10–25% but deliver greater energy savings.

9. Recommendations by building type

• New energy-efficient builds: 70–80 mm profile, 5+ chambers, reinforced frame, triple glazing, Low-E, argon fill.
• Renovations: if depth is limited, choose optimized 60–70 mm systems with efficient chamber geometry.
• Noisy locations: invest in acoustic glass combinations for higher Rw.

Practical checklist before ordering

• Profile depth: 70–80 mm for most new builds.
• Chambers: 5 or more.
• Glazing: triple glazed unit with Low-E and argon.
• Reinforcement: galvanized steel or composite.
• Hardware: multi-point locking, micro-ventilation.
• Certifications: CE, thermal and acoustic test reports.

FAQ — quick answers

Is 70 mm enough for an apartment in Kaunas?

Yes. A 70 mm, 5-chamber profile with triple glazing provides a good balance between cost and energy performance.

Do passive houses require 90 mm profiles?

Passive houses often use wider frames (80–90 mm) combined with very warm glazing, but whole-building design is the decisive factor.

Can I save money on hardware?

You can, but lower-cost hardware may reduce lifespan and security. Investing in quality hardware reduces maintenance and replacement costs.

How to prevent condensation?

Correct installation, adequate ventilation and low Uw windows (profile + glazing) are key to avoiding condensation.

Description: Practical guide for selecting PVC profiles and glazing for Lithuanian climate, covering thermal, acoustic and installation aspects.