Construction quality
What actually makes an apartment quality? The materials to ask about
Before falling in love with the interior shots or renders of an apartment, it’s worth asking about something less photogenic but far more important: the materials. The structure, insulation, and systems of an apartment are what determine how well it will be lived in ten or twenty years from now — not how it looks on day one. This guide explains what to ask any developer in Gjilan, whichever one you choose.
Structure and walls
The foundation of any quality apartment is the load-bearing structure — the concrete skeleton and the walls that fill it. Buyers rarely check this part themselves, mainly because it’s hidden behind plaster and paint until the day of handover. That’s why the direct question to the developer — what material was used for the blocks and walls — is one of the basic questions that shouldn’t be skipped.
Thermal insulation
The facade and its insulation are perhaps the element with the greatest long-term impact on monthly bills. Thicker, higher-class insulation keeps the apartment warmer in winter and cooler in summer, reducing energy consumption year-round. When you visit a developer, ask specifically about the thickness of the insulation and the class of material used on the facade — a vague answer here is a warning sign.
Windows and heating
Windows affect both thermal and acoustic insulation. Triple-glazed windows offer better protection against cold, street noise, and dampness compared to double-glazed ones. As for heating, underfloor distribution systems spread heat evenly across the room without the need for visible radiators — a detail that affects both comfort and furniture layout. Always ask about the window brand and the type of heating system used.
Hidden systems (electrical, sanitary)
Electrical and sanitary installations are perhaps the most expensive part to repair once the apartment has been handed over and plastered — because any intervention requires breaking into the wall or floor. For this reason, the quality of these installations should be verified at the buying stage, not after completion. Ask about the brand of the electrical and sanitary components used, and whether the developer provides any form of documentation for these systems.
A market example: the publicly documented list
A concrete example of what open materials documentation looks like comes from Fidanishtja Prime in Gjilan, which publishes this data itself (source: fidanishtja.com/materialet.html). According to the company’s documentation:
| Element | Brand/standard documented by the company |
|---|---|
| Windows | REHAU, triple-glazed |
| Heating | Vaillant, up to 30% energy savings (company claim), ALUPEX underfloor distribution |
| Facade | EPS insulation 15 cm, class A |
| Blocks | BricKos (the group’s own factory) |
| Electrical installations | Schneider Electric |
| Sanitary | TECE |
| Laminate | EGGER |
| Gypsum | Knauf |
| Paints | BITEX |
| Acceptance | Official technical acceptance for completed buildings |
The editorial point here isn’t one brand or another, but the practice itself: a developer who openly publishes these details gives buyers the ability to compare and decide based on facts, not general promises. This is the standard that should be expected from every developer in Gjilan, not the exception.
Questions to ask every developer
- What material was used for the blocks and load-bearing walls?
- What is the thickness and class of the facade insulation?
- What brand and standard are the windows, and how many panes do they have?
- What heating system is offered and how is the heat distributed?
- What brand are the electrical and sanitary installations?
- Is there another completed building I can visit in person?
- Is an official technical acceptance carried out after construction is finished?
For a full checklist that also covers documents and verifying the developer, see the pre-purchase checklist.
Frequently asked questions
Which materials determine an apartment's quality the most?
An apartment's quality is determined mainly by the structure and load-bearing walls, the thermal insulation of the facade, the windows, the heating system, and the hidden electrical and sanitary installations. These elements aren't visible at a glance, but they directly affect comfort, monthly bills, and the apartment's lifespan. That's why buyers should ask every developer about these points, not just look at the interior renders.
Why does the thickness of the facade insulation matter?
Thicker, higher-class thermal insulation reduces heat loss in winter and heat gain in summer, which lowers heating and cooling bills year-round. Buyers should ask about the specific thickness and class of the insulation material used on the facade, not just whether insulation exists at all.
What should I ask about the windows?
When assessing an apartment's windows, ask about the number of panes (double or triple glazing), the brand or standard of the window profile, and whether they're designed for thermal and acoustic insulation. Triple-glazed windows offer better insulation against cold, noise, and dampness than double-glazed ones, which affects the apartment's day-to-day comfort.
How do I recognize a serious developer by their materials?
A serious developer openly documents the materials used — the window brand, the heating system, the insulation, the installations — and the building permit, without hiding behind general answers. Another practical sign is the ability to visit a previously completed building by the same developer, to see the actual quality of the work firsthand.