Which windows are best for series 104

Series 104 refers to a common Soviet-era panel apartment type found across the Baltics. Apartments of this series have relatively small window openings, thin wall panels, and often uneven reveals — characteristics that influence the choice of PVC windows. This guide explains which window systems and options provide the best balance of thermal performance, sound insulation, durability and cost.

Quick decision plan

Accurate on-site measurement and reveal inspection.
Choose a profile based on thermal needs and glass weight.
Select the right insulating glass unit (IGU) for climate and noise.
Choose durable hardware and plan ventilation.
Ensure professional installation adapted to panel walls.

1. Measurements and reveal preparation

A professional measuring visit is essential. For series 104 you should check:

exact width and height of the opening including reveals;
vertical and horizontal alignment with a level;
wall thickness and space for mounting foam and anchors.

Often reinforcement or a mounting plate is needed to avoid panel cracking and to ensure a rigid fixation.

2. Profile: chamber count and strength

Recommended profiles range from 3 to 5 chambers depending on budget and goals:

3-chamber profile — economical, suitable for interior-facing windows or well-heated apartments;
5-chamber profile — better thermal and acoustic performance, recommended for façade windows;
reinforced profile with steel insert is required for wide openings or heavy IGUs.

3. Insulating glass units: double or triple?

Double-glazed IGU (one cavity) is good for moderate climates and budget-limited projects.
Triple-glazed IGU improves thermal and sound insulation significantly — ideal for noisy streets or colder exposures.
Low-E coatings and argon filling increase efficiency without much added weight.

4. Opening types and ergonomics

For kitchens and balconies, a tilt-and-turn sash plus a fixed pane is practical.
Tilt position allows ventilation without full opening and improves safety.
Consider sash division: standard module sizes in series 104 may require custom configurations.

5. Hardware, seals and ventilation

Reliable multipoint locking hardware with micro-adjustment increases longevity and security.
High-quality seals (EPDM, TPE) keep elasticity and airtightness for years.
Install mechanical or trickle vents to avoid damp and ensure fresh air without drafts.

6. Installation and reveals

Warm-seal installation with vapor- and waterproof tapes (external breathable tape and internal vapor-tight tape) plus mounting foam is recommended.
Pay attention to drip edges and clearances — airtight sealing between panel wall and frame is crucial.

7. Cost and timing

Basic: 3-chamber profile + double IGU — budget-friendly but less insulating.
Optimal: 5-chamber profile + Low-E double or light triple IGU — best value for energy efficiency.
Typical delivery and installation time: 1–4 weeks depending on configuration.

FAQ and practical tips

Which windows suit the kitchen in a 104 apartment?

Choose moisture-resistant seals, tilt-and-turn mechanisms for ventilation, and consider a trickle vent for constant air supply.

Do I need triple glazing?

Triple glazing is recommended if the apartment faces a busy road or if heating efficiency is a priority. For average conditions, Low-E double glazing often suffices.

How to avoid measurement mistakes?

Always use professional measuring services: DIY measurements in panel buildings often lead to incorrect fit due to uneven reveals.

How long do PVC windows last?

With proper installation and maintenance: 25–40 years, depending on profile quality, hardware, and usage.

Should I install sills and reveals immediately?

Yes. After window installation, internal and external reveals and a sill ensure full sealing and a finished appearance.

If you want, we can prepare a free estimate and come for measurements with sample profiles and glass types. Final price and timeline depend on exact opening dimensions and selected options.

Which windows are best for series 104