Balcony and Loggia Renovation During Apartment Remodel

Balcony and loggia work during apartment renovation in Moscow is not "paint the walls" — it is a separate mini-project with insulation, waterproofing, glazing, and often approvals. In 2026, a typical 3–6 m² loggia with insulation, floor, and finish without glazing change often quotes 80,000–180,000 RUB; with warm glazing, room merge, and electric underfloor heat, 150,000–350,000 RUB. Timeline: 2–6 weeks depending on deliveries and approvals.

Profmaster has delivered turnkey apartment renovation in Moscow and the region since 2006. Below: how to embed balcony work in the whole schedule, what to approve, how to build the floor stack, and how to avoid mold next season. Flat context: Apartment Renovation Cost in Moscow in 2026. Underfloor heat: Underfloor Heating During Renovation.

Balcony vs loggia: what changes renovation

In short: different geometry — different heat-loss and load risks.

Parameter	Balcony	Loggia
Position	Projects from wall	Inside building contour
Slab insulation	Critical below and at edge	Easier, slope still required
Glazing	Higher wind load	Often warmer by default
Room merge	Harder on heat and documents	Common in new builds
Slab load	Check finish and furniture weight	Usually higher allowed load

Before start, confirm allowed slab load and glazing rules with management company or building docs.

When to include balcony in whole-flat estimate

In short: sync with flat floors, windows, and heating.

Include in full cycle if:

• you plan merge with room or home office;
• you replace all windows and sills in the flat;
• you install underfloor heat in adjacent room — threshold and level matter;
• you insulate loggia for year-round use;
• you want unified finish without a step between zones.

Can defer if:

• balcony stays cold storage;
• budget is tight — wet rooms first;
• glazing and approval path unresolved.

Whole-flat stages: Renovation in a New Building.

Approvals and documents

In short: glazing and window-block removal are not "small items in the crew contract."

Verify:

• management company permission for glazing type and projection;
• facade impact (especially central and protected zones);
• plan change on merge — EGRN and technical plan;
• radiator relocation or removal at window;
• parapet anchoring liability.

Demolishing the window block before document check is a common stop-work and resale problem.

Floor build-up: correct stack

In short: outward slope, underside waterproofing, insulation, vapor barrier, screed, finish.

Layers (typical warm loggia)

Layer	Role	Mistake
Slab waterproofing	Rain and condensation protection	Skipped corners
Insulation (XPS/PIR)	Cut heat loss	Gaps between boards
Vapor barrier	Block moisture from flat	Torn seams
Screed with slope	1–2% outward	Flat floor — puddles
Finish (tile, SPC)	Wear resistance	Heavy stone without load calc

On uninsulated cold balcony, waterproofing, slope, tile may suffice — but junction with warm room still needs design.

Glazing and joints

In short: balcony leaks become water under the flat floor.

Check:

• frame-to-parapet sealing;
• drips and caps;
• drainage holes in profile (do not foam-block);
• install quality per manufacturer spec.

Glazing replacement is often a separate estimate with another contractor — agree liability for frame-to-finish joint.

Glazing types: cold, warm, sliding

Glazing type	Heat	Price guide	When chosen
Cold aluminum	Low	80,000–150,000 RUB for 3–4 m²	Storage, seasonal
Warm PVC / aluminum	Medium–high	120,000–220,000 RUB	Office, lounge
Frameless sliding	High if well installed	180,000–350,000 RUB	Panorama, merge
Glass unit replace	Depends on frame	40,000–90,000 RUB	Sound frame, drafts

Room merge usually needs warm glazing and insulated reveal.

Winter use and condensation

Symptom	Cause	Fix
Glass dripping in winter	Cold glazing + humidity	Warm unit or lower humidity
Mold in room corner	Cold bridge on reveal	Insulate reveal and floor strip
Puddles on floor	No slope	Screed redo
Musty smell	No airflow	Supply/exhaust, airing

More on loggia heat: underfloor heating article.

Wall and ceiling insulation

Zone	Material	Note
Floor	XPS 30–50 mm	Over waterproofing
Walls	PIR / XPS / wool per plan	No gaps
Ceiling	Same + vapor barrier	Especially top floor
Reveal	Insulation + finish	Else mold in room corner

Electrics and underfloor heat

In short: dedicated line, RCD, moisture rating.

Option	Budget	When it fits
No underfloor heat	Base	Cold loggia, storage
Mat under tile	+25,000–60,000 RUB	Office, winter lounge
Cable under tile	+35,000–80,000 RUB	Complex geometry

Merging with room

In short: more square meters — more heat and document duty.

When removing window block: insulate reveal, level floor, rebalance heating, check ventilation. Do not merge "for meters" without insulation.

Budget benchmarks 2026

Scope	3–4 m²	5–8 m²
Cold finish	40,000–80,000 RUB	60,000–120,000 RUB
Insulation + floor + finish	80,000–150,000 RUB	120,000–220,000 RUB
+ underfloor heat	+25,000–60,000 RUB	+35,000–80,000 RUB
+ room merge	+50,000–150,000 RUB	+70,000–200,000 RUB

Calculators: capital, comfort. On resale: secondary checklist.

Wall and ceiling finishes

Material	Upside	Downside
Porcelain	Durable	Heavy — check slab load
SPC	Moisture-resistant, fast	Some brands have temp limits
PVC panels	Budget, quick	Less premium look
Plaster + paint	Matches flat style	Needs flat substrate

Link to kitchen and living room

Balcony next to kitchen or living room affects light, noise, and thermal contour. Plan floor level and lighting before laminate in the room — threshold rework is costly.

Typical mistakes at this junction: different floor height without a designed transition; no insulation on the reveal after merge; kitchen hood exhaust ignored when loggia becomes part of the living zone. Fix these in the estimate before demolition — retrofit after tile is expensive.

Schedule within whole-flat renovation

1. Slab and glazing survey.
2. Approvals if needed.
3. Demolition, waterproofing, insulation.
4. Electrics, underfloor heat, screed.
5. Finishes, room junction.
6. Acceptance — checklist.

Checklist before start

Technical

• Slab, parapet, glazing inspected
• Slope and drainage verified
• Load defined for finish and furniture
• Electrics with RCD planned

Documents

• Management company glazing rules clarified
• Plan checked if merging with room
• Radiator move agreed if needed

Estimate

• Separate balcony/loggia section
• Insulation and waterproofing brands listed
• Junction with room floor included

Questions to ask the contractor

• What floor stack do you propose and where is the vapor barrier?
• How are slope and drainage ensured?
• Is approval required for our merge scenario?
• Who is liable for glazing-to-finish joints?
• Is chosen load allowed on the slab?
• How is underfloor heat wired — dedicated line and RCD?
• How is the reveal insulated when removing window block?
• Is seamless floor junction with room included?
• What timeline including screed drying?
• How is waterproofing accepted before floor close?

What Profmaster can do

Profmaster executes balcony and loggia renovation as part of turnkey apartment work in Moscow and the region — aligned with floors, windows, insulation, and electrics.

We are a fit when:

• balcony is in the full schedule, not "later separately";
• you need insulation and finish without condensation;
• room merge needs document check;
• junction with underfloor heat in adjacent zone matters;
• you want single liability for engineering and finish.

In business since 2006. Request on contacts; services on services.

Glazing choice by scenario

In short: cold glazing is cheaper but does not deliver a winter study.

Type	When	Budget 3–4 m²
Cold	Storage, summer	80,000–150,000 RUB
Warm PVC	Office, lounge	120,000–220,000 RUB
Sliding	Panorama, merge	180,000–350,000 RUB

Glass unit replacement only works on sound frames — 40,000–90,000 RUB, but junction sealing still matters.

Common mistakes and how to avoid them

Mistake	Consequence	Fix
Flat floor	Puddles, leaks	1–2% outward slope
Insulation without vapor barrier	Condensation, mold	Closed contour
Merge without reveal insulation	Cold room corner	Insulate strip at former window
Electrics without RCD	Shock risk	Dedicated line
Heavy tile without load calc	Slab cracks	Check allowed load
Glazing and finish by separate crews	Leak disputes	Fix joints in contract

On resale, run secondary checklist early — slab and parapet issues often appear only after demolition.

Estimate: required separate lines

In short: "balcony turnkey" without breakdown breeds disputes.

1. Demolition of old finish and glazing.
2. Slab and apartment joint waterproofing.
3. Insulation brand and thickness.
4. Screed with slope.
5. Electrics and underfloor heat.
6. Floor and wall finishes.
7. Reveals and window junctions.
8. Waste removal.

How to read the full estimate: how to read renovation estimate. Flat bands: capital calculator and comfort calculator. If loggia gets underfloor heat, align with underfloor heating article — load and RCD belong in screed planning. Request a written acceptance act for waterproofing at the slab — photos alone are not enough if a leak appears the first winter.

Summary

Balcony and loggia renovation during apartment remodel in Moscow is heat, water, and documents — not tile alone. Build the floor correctly, approve glazing and merge, sync with room work — and the balcony becomes usable space, not a leak source.

In short: slope, waterproofing, vapor barrier, flat junction — in one estimate. Treat the balcony as part of the apartment thermal envelope, not an outdoor afterthought.