How to choose windows for a new building

How to choose windows for a new building

Choosing windows for a new building affects comfort, energy bills and noise levels. This guide explains practical steps to select PVC windows, glass units, hardware and installation approaches suitable for a modern apartment in Latvia and similar climates.

1. Check the construction stage and requirements

• If the building is at final finishing, measurements and installation are done against the finished surface. In pre-finishing stages rely on precise opening dimensions and coordination with the developer.
• Clarify tolerances, façade details and whether windows will be installed from the inside or outside.

Tip: agree with the developer on measurement and installation windowsill/insulation details to avoid later adjustments.

2. Frame material: why PVC is common

• PVC frames are cost-effective, low-maintenance and provide good thermal and acoustic performance.
• Aluminum is used for large spans and a slim profile; wood offers natural appearance but needs maintenance.
• For northern climates, PVC with steel reinforcement ensures long-term durability.

3. Profile class and chamber count

• More chambers usually mean better insulation and stiffness. For apartments 5–6 chamber profiles are typical.
• Look for certified profiles, wall thickness and reinforcement specs.

4. Glass unit: energy efficiency and soundproofing

• A double-glazed unit with Low-E coating and argon fill is the best compromise for energy savings (low Uw) in Latvian climate.
• For noisy streets consider laminated glass or units with asymmetrical glass thickness and larger spacer width.

5. Seals and hardware

• Double sealing is recommended for wind and moisture protection.
• Choose hardware from reputable manufacturers with corrosion resistance and adjustable fittings.

6. Ventilation and micro-ventilation

• New buildings often have tight envelopes — ensure there is a ventilation strategy. Micro-ventilation options or trickle vents on windows help prevent condensation.
• Consider integrated ventilation valves if the building lacks a mechanical system.

7. Installation: the hidden key

• Poor installation can nullify the benefits of an expensive profile and glass unit.
• Proper installation includes thermal mounting (warm installation) with internal vapor barrier, insulating layer and external weatherproof layer.
• Ask for installation warranty and check protocols for airtightness testing.

8. Appearance and finishing touches

• Frame color, glazing bars, handle style and sill choice affect interior design. White is universal; foil finishes imitate wood grain.
• Choose sills and external flashings that match the window style.

9. Budget and priorities

• Decide priorities: thermal performance, sound insulation, appearance, or cost.
• Often it makes sense to invest in a better glass unit and quality installation — they yield long-term savings on heating.

FAQ

Which profile is best for a new apartment?

A 5–6 chamber PVC profile with internal steel reinforcement is a balanced choice for apartments. If you need slim sightlines or very large openings, consider aluminum.

Is warm installation necessary?

Yes. Warm installation with internal vapor barrier and external weatherproofing improves the window’s thermal performance and prevents moisture problems.

Double- or triple-glazed units?

For most Latvian apartments, double-glazed Low-E units with argon are sufficient. Triple glazing is worth it for extreme energy efficiency or very large windows.

How are windows measured in a new building?

Measurements are done by a specialist; installers keep a 10–20 mm clearance around the frame for leveling and insulation. When possible, measure after finishes are complete.

What matters more: profile or glass unit?

Both matter. The profile defines structural stability and some thermal resistance; the glass unit provides most of the thermal and acoustic performance. Balance spending between them.

Warranties and service

Choose a supplier offering warranty on profile, glass and installation. Easy access to spare parts and local service is a big advantage.

If you want, we can prepare a tailored recommendation and a price estimate — send us measurements, photos of openings and your priorities (heat, sound, budget).