In Batumi, apartments have three typical troubles — mould and damp, a crooked white-frame finish from the developer, and condensation on windows. They almost always come together, and we've seen this more than once. The root cause is shared: the maritime climate, weak ventilation, and the developer's wish to hand over the property with the minimum set of works. They're cured only together, too. Point measures like a fan in the bathroom or replacing a reveal give a temporary effect, but a season later it's all back. Below we go through what's actually happening in a Batumi apartment and how to close each of these fronts systematically.
Why an apartment in Batumi is not an apartment in central Russia
The main thing you need to understand about any apartment in Batumi: it's a coastal city. High humidity here isn't a seasonal anomaly, it's a constant background. The air is saturated with water for most of the year, and that water behaves indoors differently than it does in a continental climate. It settles on cold surfaces, builds up in corners, soaks into porous materials, finds its way in through any gap. The same wall, the same glazing unit, the same sealant joint that work fine for years in central Russia start leaking in their first season in Batumi.
Every other problem grows out of this. Mould is a room's reaction to humidity plus weak ventilation. Condensation on a window is the temperature difference between the glass and the room when the air is already loaded with water. Cheap aerated concrete in a humid climate crumbles faster than it should. A window installed the usual way leaks in a storm, because the rain comes from the side, not from above. A coastal city doesn't forgive compromises in engineering. Every decision has to be checked against the question — how will it behave under constant humidity and storm winds off the sea.
Mould and damp
Mould is the main problem of Batumi apartments (I think if you're reading this article, you know exactly what I'm talking about). It shows up in new builds too, but especially widely in the older housing stock. A good example is the "Magnolia" residential complex, a building on the front line that has become legendary. Buildings of that level and age show how a problem accumulates if you live for decades with the same wall composition, windows and ventilation that seemed adequate at the time of construction. Mould rarely appears instantly and out of nowhere. It's always a combination of factors: humid outside air, weak air exchange, cold surfaces (glass, reveals, external corners) where condensation forms, and porous materials that soak up water and don't dry out for a long time.
You can't beat mould cosmetically, and no, paint-overs don't solve it. And don't try to solve the problem cosmetically — you can damage your own health. You can scrub stains and treat them with antiseptic all you like, but until the cause is removed (excess moisture and the environment that lets the fungus grow), it will keep coming back. So fighting mould in Batumi is work with air and temperature, not with the walls.
Why ventilation can't cope in Batumi
Ventilation in Batumi is chronically suffering everywhere — in the older housing stock, in many new builds, and even in office spaces. The standard scheme of natural exhaust through the shaft in the bathroom and kitchen works poorly in this climate. Natural draft is often weak because of the high outside humidity: the closer the humid outside air is in density and temperature to the air inside, the weaker that draft on which all passive ventilation relies.
A natural scheme can't pull out enough of the spent, water-saturated air. It stays in the apartment, settles on cold surfaces, feeds the mould. So in Batumi you need both supply and exhaust ventilation. Supply pushes fresh air in, exhaust takes the spent air out — and exhaust has to be powered too. You can't rely on natural draft here. Powered exhaust is mandatory. It's not a comfort option, it's a condition without which the apartment starts blooming.
Powered exhaust in the bathroom
The bathroom is the wettest room, and it's from there that moisture spreads through the rest if it isn't pulled out immediately. The rule is simple: the bathroom must have exhaust ventilation. Not "where possible," but always and powered.
The fan itself is sized to the room volume. We calculate the volume of the bathroom and pick a unit with the capacity for several full air changes per hour. A decorative fan installed for show won't cope with Batumi's humidity. It can't pull the steam out fast enough after a shower, and then drying towels and surfaces continue to feed moisture into the air for a long time. If the exhaust is weak, mould first appears on the bathroom ceiling and in corners, then moves into the adjoining hallway, bedroom, wardrobe.
A dehumidifier with a drain connection
A separate scenario — long absences. An apartment closed up for several weeks, especially in shoulder season, becomes an ideal environment for mould: warm, humid, no air movement. People come back and find black patches where there were none. We've seen this more than once.
For that case, it's worth installing a dehumidifier with a connection to the drain. The unit autonomously holds humidity below the threshold at which mould grows, and the collected condensate goes into the drain — no tank to empty by hand. While the owners are away, the dehumidifier works for them and stops the apartment from blooming. For housing rented out seasonally or used as a second home, such a dehumidifier is the most sensible investment in mould protection.
Underfloor heating as a way to fight mould
Another tool is underfloor heating, especially the water-based kind. People usually see it as a comfort feature, but in Batumi it has a more important function: it strongly dries the air in winter and spring. Heating a large area of floor works as a slow, even drying of the entire room volume. Moisture leaves the warm corners, and the wall and floor materials stop staying wet for long after rain or a storm.
That removes the very environment in which mould takes hold. Without dampness on surfaces and without a stagnant wet zone, the fungus simply has nowhere to grow. Underfloor heating doesn't replace ventilation, but combined with powered exhaust and supply it gives a stably dry microclimate. In a new build or during a major renovation, it's worth designing in from the start. It pays back not in comfort but in the absence of mould. Our Level Up crew always specifies water-based underfloor heating on new projects together with the screed design, so we don't have to come back to the question later.
A crooked white-frame finish
The second big block of problems is the condition in which a developer in Batumi hands over an apartment. Formally, a white-frame finish is an apartment with rough finishing, ready for the final finish: walls built, screed poured, windows installed, wiring run. In reality, a white-frame finish in Batumi is an apartment in which the developer has done the bare minimum needed to formally hand the property over.
Between "ready for the final finish" and "the bare minimum done to hand over" there's a chasm. In the first case you walk in and calmly start finishing. In the second you discover that before laying tile or installing a kitchen, you have to redo what's already been done: the screed, the walls, sometimes the windows, sometimes the wiring. That's a typical scenario you encounter everywhere. So when buying a white-frame finish in Batumi, you have to go in with eyes open and budget for redo work, not just for the final finish. If the developer can sell you the apartment as a bare frame — take the bare frame.
Screed level differences of 3–7 cm and cracks from no reinforcement
Screed is almost always the first problem you see as soon as you start measuring. Level differences of 3–7 cm across the apartment turn up regularly: in one corner the floor is at one level, in the far corner — several centimetres higher or lower. When you lay the final flooring, that difference will need to be evened out. Another self-levelling layer goes on top. That's money, time, and lost ceiling height.
The second problem is cracks. Many developers pour the screed without reinforcement. Without mesh or fibre, it cracks under loads, shrinkage and slab vibration. Cracks aren't cosmetic. They cause flooring to lift, moisture goes into them, they become weak points. Often it's easier and cheaper to redo the screed from scratch than to even out the existing one.
Cheap aerated concrete that crumbles
The internal partition walls (and sometimes part of the external ones) are made from the cheapest aerated concrete blocks. Aerated concrete itself is a normal material, but block quality depends heavily on the manufacturer. The cheapest aerated concrete in a humid climate crumbles. When you try to fix a heavy cabinet, a TV bracket, a water heater or a wall-hung toilet, the fixing won't hold. The corner of a wall chips off on impact. The surface takes plaster poorly. There are two strategies: either reinforce the critical points with special hardware and embedded plates, or demolish the partitions and rebuild from a normal material.
Walls with deviations of up to 5–6 cm and corners not at 90°
Walls are most often uneven. Vertical deviations of up to 5–6 cm regularly show on a basic laser level at handover. Such a wall will need to be straightened with plaster, drywall, or a combination. A thin layer won't be enough.
Corners are a separate story. Corners in a white-frame finish very often aren't square. At handover, always check that they're 90°. When the corners drift, everything that meets the wall suffers: the kitchen units don't sit, the tile runs in a wave, built-in wardrobes don't fit the niche, any rectangular furniture pushes against the crooked geometry. The earlier you flag the problem, the better the chance of getting the developer to fix it. After move-in, you're fixing those corners at your own expense.
Crooked windows that leak in a storm
Windows in a white-frame finish are often installed crooked. In calm weather it's invisible. The problem surfaces in the first serious storm: water starts pouring into the window, and it leaks. In Batumi, storm wind off the sea is normal, and it drives rain into the window from the side and from below, not from above. Any installation defect — a skewed frame, a poorly seated bead, a badly treated joint with the opening — turns into a leak in moments like that. Water runs down the wall inside, destroys the reveals, gets under the windowsill, reaches the screed. A wet patch appears that doesn't dry, because outside the wet weather continues and inside the ventilation is weak. A crooked window isn't a local problem of one unit. It's the trigger for all the other troubles at once.
Seeping facades
Some developers hand over buildings whose facades seep. In our maritime Batumi climate, that's especially painful. The exterior wall has to work as protection against driving rain and salty air, and if it can't, moisture slowly penetrates inside. The visible consequence is damp patches on internal walls, especially in corners and along external joints, sometimes salt blooms and peeling plaster from the inside.
Eliminating such a defect at the level of an individual apartment is almost impossible. It's a question of facade work on the entire building, and it's solved through the developer or the management company. At the owner's level, the most you can do is internal waterproofing of the problem wall and compensation through good ventilation. But the root cause stays outside, and until that's closed, the damp will keep coming back.
Formal or absent grounding
Grounding in Batumi new builds is often done formally, or it's absent. From the inside, the apartment has sockets with a third pin, but if you check, the pin is connected to nothing — or it's wired into a building-wide circuit that itself is wired who knows how. This is a safety issue. The water heater, washing machine, dishwasher and cooker have to operate with real grounding, not with a socket that has a third prong for show. Checking the grounding is a mandatory item at white-frame handover. If it's missing, fixing it after the final finish is expensive and difficult: the wiring is already buried in the walls. So either insist on the developer doing it, or redo the electrics before you close up the walls.
What to do with a white-frame finish
There are essentially two strategies.
The first — refuse to accept the apartment with major defects and demand fixes for the problem areas. That's the right path, and it's always worth trying. The more thoroughly you document the screed deviations, the wall slants, the off-square corners, the window leaks and the state of the grounding, the stronger your position. With persistence, some of the problems get closed before the handover is signed.
The second — the realistic one: in our experience, it's cheaper to take the bare frame and redo everything from scratch. The paradox is that redoing crooked "ready" work costs more than working from a clean slate. If you're buying for yourself and you see a large volume of defects, the bare frame is the rational scenario. And the main thing: if you're doing the apartment for yourself, design the engineering and infrastructure properly. Electrics, plumbing, ventilation, underfloor heating, drain points, internet routing — all of that is solved at the design stage, before the walls and screed are closed up.
Condensation on windows
The third typical Batumi trouble is wet windows in the morning. You walk into a room and there are drops on the glass, a puddle on the windowsill, a damp strip around the perimeter of the frame. At first it looks harmless: "well, it's just fogged up." But it isn't "just fogged up." It's water that appears in this place regularly and works as a slow destroyer of everything around the window.
What condensation destroys
The first and most visible consequence — condensation destroys the reveals. Constant moisture stops the plaster of the reveals from drying. It absorbs water, loses strength, starts crumbling, comes away from the substrate. Drywall reveals behave even worse: drywall in a damp environment swells and crumbles, the cardboard skin peels off, the panel loses its geometry.
Then comes the cascade. On the damaged, wet substrate, mould quickly appears. Humidity in the window zone goes up even further, because the wet reveals themselves become a source of vapour. The vapour goes into the room, settles on other cold surfaces, and the overall humidity rises. Condensation on a window isn't a local problem: next comes mould, and the quality of life in the apartment starts to slip. So you have to fight condensation. If it appears regularly, you need to find the cause and remove it.
A single-chamber glazing unit is the main cause
There are two causes of condensation: a single-chamber glazing unit (a double-pane unit) or incorrect window installation. The most common in new builds is the single-chamber unit. Honestly, a single-chamber unit is always a problem: it has low resistance to heat transfer. In plain terms — the inner pane of such a unit is cold. When the warm humid air of the room touches the cold glass, water vapour falls out on it as droplets. That's physics, not a defect of a particular window.
The solution — a switch to a double-chamber glazing unit (a triple-pane unit). In Batumi this is realistic and inexpensive: glazing units are made on the spot, you don't have to ship a finished window from far away. A double-chamber unit filled with argon holds heat on the inner pane much better, and the inner pane stops being a cold dew point. A double-chamber argon-filled unit closes the condensation problem on the glass.
But there's a nuance. This replacement works if the floor isn't high: you can disassemble the unit, swap it, put it back. Without serious logistics and without coordinating with the management company. If the floor is high, it gets complicated. Without the developer or the management company, you can't replace such a glazing unit, especially when it comes to panoramic windows. The unit sizes are larger, the installation is more complex, the work requires industrial climbing or equipment, and the owner won't close this question alone. On those buildings, the only path is through the developer or the management company.
Incorrect window installation
The second cause of condensation is incorrect window installation. The glazing unit can be fine, but the installation is the problem. The frame is set with gaps, the foam isn't sealed properly: there's no vapour-permeable tape on the outside, no vapour-barrier tape on the inside. Moisture gets into the gap between the frame and the wall and stays there, doesn't escape outward. The reveals on the room side freeze, because the gap acts as a thermal bridge. Condensation forms on the frozen reveals, and from there everything plays out the same way: plaster destruction, drywall swelling, mould.
The principle of correct installation is simple: the installation joint should be closed with two different tapes. Outside — vapour-permeable, to keep external moisture out of the joint while letting moisture escape outward. Inside — vapour-barrier, to keep the warm humid air of the room out of the joint. If even one of these tapes is missing, the joint works as a moisture trap, and no glazing unit can compensate. So if you've replaced the unit with a double-chamber argon-filled one and condensation is still there — you need to revisit the installation joint. And vice versa: if the unit is fine and condensation is still appearing, you look at the installation first, not at the window itself.
Why all of this can only be solved together
When I was writing this article I built it around the main idea: mould, condensation and a crooked frame in Batumi aren't three separate stories. They're one plot, in which each link reinforces the others.
The chain works like this. Weak ventilation leaves too much moisture in the apartment. A single-chamber unit or a poorly installed window provides a cold point on which that moisture falls as condensation. Condensation destroys the reveals. On the destroyed reveals, mould appears. Mould is no longer the problem of one window — it's the problem of the air in the whole apartment. Then it finds other cold bridges (external corners of walls made of cheap aerated concrete, the zone behind furniture against an external wall, the bathroom ceiling with insufficient exhaust) and spreads through the apartment.
In parallel, a second chain is at work. Crooked screed and crooked walls force you to apply thick layers of levelling. Those layers dry slowly, all the more so in a humid climate. If ventilation is weak, humidity stays high and the materials dry even slower. While they're drying, mould easily takes hold in any warm, damp corner. And if the facade is also seeping, moisture comes not just from inside but from outside.
So point solutions don't work in Batumi. Replace only the glazing unit without touching ventilation — condensation leaves the glass but not the apartment. Do only the ventilation without touching the reveals and walls — the air becomes drier, but the mould in already-damaged places goes on living. All these problems are solved only together. At the design stage you have to consider everything at once: ventilation (supply and exhaust, with powered exhaust at minimum in the bathroom), glazing (double-chamber argon-filled units where technically possible), correct window installation with two tapes, the state of the screed and the walls, the materials of the partitions, grounding, underfloor heating as a drying tool, a dehumidifier with a drain connection for long absences. That's the baseline kit, without which a Batumi apartment over time arrives at the same finale. Our Level Up crew always designs renovations from this logic — putting all systems in from the start, not solving problems as they come.
FAQ
Takeaways
- Batumi is a coastal city, and the climate here is constant high humidity that doesn't forgive compromises in engineering.
- Mould is the main problem of Batumi apartments, especially in the older housing stock (example — the "Magnolia" complex). It's cured only systemically: supply-and-exhaust ventilation, mandatory powered exhaust in the bathroom, underfloor heating as a way to dry the air, a dehumidifier with a drain connection for the duration of long absences.
- A white-frame finish in Batumi isn't "ready for the final finish" — it's the minimum the developer did to hand over the property. Typical defects: screed level difference of 3–7 cm, no reinforcement, cheap aerated concrete, wall deviations up to 5–6 cm, off-square corners, crooked windows, seeping facades, formal grounding.
- On the white-frame finish: document defects at handover and demand fixes. If there are too many, in our experience it's cheaper to take the bare frame and redo wiring and screed from scratch.
- Condensation on windows destroys plaster and drywall reveals and leads to mould. Two causes: a single-chamber glazing unit or incorrect window installation.
- The fix for the glazing unit is replacement with a double-chamber argon-filled one (in Batumi units are made on the spot). The constraint is high floors and panoramic windows: there you can't manage without the developer or the management company.
- The fix for the window installation is vapour-permeable tape outside and vapour-barrier tape inside. Without them, the joint becomes a moisture trap.
- All three problems are linked by one chain of humidity and weak engineering, so they're closed only together and ideally at the design stage, not as the renovation goes.