Remove the damaged floor layer
We strip everything unsound back to solid concrete and clear the joint between balcony and wall.
We restore balconies. We protect the building structure.
We repair apartment-building balconies: we restore the concrete, protect the steel from rust and shut water out of the structure.
COMPLETE RENOVATION. A CLEAR PLAN. CONSIDERED PROTECTION.
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Six layers. One complete system.
Each element has a specific role: the substrate carries the load, the bonding layer connects, the fall directs water and the elastic finish protects the surface.
- Existing concrete slab
The load-bearing structure is opened, cleaned and assessed before new layers are installed.
- Epoxy bonding adhesive
A two-component epoxy adhesive connects the existing concrete with the new repair and drainage-fall layer.
- Repair and drainage-fall layer
A cement-based layer reinstates the substrate and creates the required fall toward drainage.
- Epoxy primer
A two-component epoxy primer prepares the cured mineral substrate for the elastic coating.
- Elastic polyurethane coating
A continuous, seamless elastic layer forms the balcony floor's protective surface.
- Decorative surface broadcast
System-compatible decorative flakes are broadcast into the fresh coating to create the surface texture and final appearance.
Exact materials and thicknesses are selected according to substrate condition, moisture, service load and the approved project specification.
- Work stage 02: Water finds the weak point
Worn coatings, cracks and open junctions allow moisture into the structure.
- Work stage 03: Moisture reaches the apartment
Water that gets past the threshold and slab soaks the interior finish, so the whole junction needs repair, not just the surface you can see.
- Work stage 04: We rebuild the junction inside
Once the outside water path is closed, we rebuild the lower wall, fit a new profile and seal the wall-to-floor joint.
- Work stage 05: We strip the damaged layers
We remove the old coating and weak substrate back to sound load-bearing concrete and clear away the debris.
- Work stage 06: We prepare the substrate
We clear the remaining loose material and dust so the new layers go onto clean, sound concrete.
- Work stage 07: We protect the railing bases
We clean the metal railing bases and treat them against corrosion, choosing the system to suit the condition of the metal and concrete.
- Work stage 08: Bond coat and a new base
An epoxy bond coat ties the old concrete to an exterior-grade EN 1504-3 class R4 repair mortar, which rebuilds the surface and sets the drainage fall.
- Work stage 09: Primer and quartz sand
Once the repair layer has cured, we prime it with epoxy and broadcast quartz sand into the wet primer, giving the next layer an even key.
- Work stage 10: One seamless coating
Quartz sand, an elastic UV-stable polyurethane, decorative flakes and a clear protective topcoat act as one seamless coating.
- Work stage 11: Six layers. One system.
Concrete, epoxy bond coat, R4 mortar, primer with quartz, elastic polyurethane and a decorative finish under a clear topcoat work as a single system.
- Work stage 12: We prepare the threshold
We clean the threshold and mask the edges so the waterproofing reaches right into the corners and finishes on a crisp line.
- Work stage 13: We carry the waterproofing over the threshold
An unbroken elastic layer covers the threshold and joints, keeping edges and corners inside one continuous envelope.
- Work stage 14: We remove the tape and inspect
We check that the coating is continuous, the corners are closed and the junction line is clean, so the whole detail at the door stays protected.
- Work stage 15: We fit a new exterior sill
The new metal sill falls away from the wall; its drip edge and sealed ends send rainwater clear of the façade.
- Work stage 16: We protect the steel under the slab
Cleaned reinforcement gets a cement-polymer passivating coat to EN 1504-7, which restores the protective alkaline environment and helps the repair mortar bond.
- Work stage 17: We rebuild the slab underside
EN 1504-3 class R4 repair mortar fills the damaged concrete, restores cover over the steel and levels the underside for the protective finish.
- Work stage 18: A finished balcony. A protected building.
The final inspection checks it all together: floor, threshold, sill, edges and the slab underside. The exact system for each building is confirmed on site.
Balcony crumbling or leaking?Start with the cause.
Water gets into concrete through cracks and joints, and the damp patch often appears far from where it gets in. We trace the water’s path, repair the damaged concrete and close that path.
Watertight junction
Unbroken waterproofing where floor, wall and threshold meet.
Slope and drainage
Water runs away from the wall to the balcony edge instead of pooling.
Selected sites
Our work
Real buildings in Tallinn, with photos and video of the work.
Concrete moves. The joint has to keep up.
Why does the joint need to flex?
Over a year a façade goes from summer heat to winter frost, and concrete slabs expand and contract with it. A rigid joint can’t keep up and cracks; an elastic one stretches and returns to shape.
Rigid joint
Cracked: water gets in
Elastic joint
Intact: water stays out
Illustration of the principle: movement is exaggerated for clarity.
A balcony repair, start to finish
What it looks like on a real building: from breaking out the old floor to the finished coating. For your building, we choose the repair based on the balconies’ condition.
Where water gets in
What lies beneath the surface
The work in photos: from damaged concrete to a protective finish.
Protect the steel from rust
Exposed reinforcement gets a protective coating, reducing the risk of further corrosion before the concrete is rebuilt.
Apply the protective coating
A continuous, flexible, seamless layer covers the floor; the finish coat gives it its final texture.
Our working standard
Time, lifespan and price.
Figures you can plan around before the inspection. Exact timing and cost come after it.
- 7working days
- Typical time for a complete renovation of one balcony.
- 10years service life
- Design service life of a correctly installed moisture-protection system.
- €500–€2,500estimated cost
- For one balcony. We prepare the exact quote after a free site inspection.
How the repair works
Six stages, from opening up to the finished coating. Each stage can show a frame from the video, though not every operation was filmed separately. We agree the scope and materials after the inspection.
Opening up and removing damage
First we remove everything damaged and unsound, back to solid concrete.
Stripping the damaged floor layer
We mechanically remove weak cement layers until we reach sound load-bearing concrete.
Opening and cleaning the façade junction
We clear old filler, dirt and loose material from the joint between slab and façade.
Cleaning the railing-post bases
We remove loose rust and dirt, then assess the condition of the metal.
Checking and protecting the reinforcement
Before rebuilding the concrete, we check the exposed steel and small details and remove anything unsound, including rotten timber add-ons.
Assessing exposed reinforcement
We check how much sound steel remains. Whether it needs strengthening, replacement or welding is decided by a qualified specialist after examining the structure.
Preparing the threshold and details
We clean, grind and vacuum the threshold, fixings and damaged metal or concrete details, and take out any rotten timber add-ons.
Protecting the steel from corrosion
A cement-polymer passivating coat restores the steel's protective alkaline environment and reduces the risk of further corrosion from moisture. Railing fixings get their own solution, chosen for the metal type and condition.
Elastic joint sealing
We prepare cracks, gaps and the slab-to-façade joint and seal them with an elastic sealant that copes with normal structural movement.
Preparing the joints
We remove old filler, dirt and loose residue so the sealant bonds to clean, sound joint faces.
Sealing with an elastic sealant
We fill the joint with an elastic exterior sealant made for façade and floor joints, which handles frost, moisture and normal temperature movement.
Epoxy bond coat and drainage fall
An epoxy bond coat ties the old concrete to a new cement-based layer that rebuilds the base and sends water to the edge.
Applying the epoxy bond coat
We apply a two-component epoxy to clean, dust-free concrete to bond the existing slab to the fresh repair mortar.
Mixing the repair mortar
We mix an exterior-grade cement mortar, built for moisture and temperature swings, exactly to its data sheet.
Forming the drainage fall
We lay and level the mortar to fall toward the edge or drain so water doesn't pool.
Primer and quartz sand
We prime the cured mortar and broadcast quartz sand into the wet primer to give the next layer something to grip.
Applying the epoxy primer
Once the repair layer has cured, we apply a two-component epoxy primer.
Broadcasting quartz sand
Dry quartz sand broadcast into the fresh primer gives an even, rough key for the elastic coating.
Elastic coating and finish
Primer, quartz, elastic polyurethane and the decorative layer work as one coating.
Applying the elastic polyurethane
One continuous, seamless coat at the thickness the system specifies.
Applying the decorative finish
We broadcast decorative flakes into the fresh polyurethane to give the floor its texture and final look.
What housing associations ask
Frequently asked questions
What to know before the inspection and repair.
Is the site visit and initial inspection free?
Yes. The specialist’s site visit and initial inspection are free of charge.
How long does one balcony take?
Typically seven working days. The schedule for the whole building depends on the number of balconies, the extent of damage, curing times and weather.
What should residents do before work begins?
We agree access in advance and give the association a short guide: how to clear the balconies and how the safe work zone will be set up.
Can weather affect the schedule?
Yes. Temperature, rain and curing times set the order of the work. We plan each stage so every layer goes down in the right conditions.
How long will the coating last?
A correctly installed system has a design service life of 10 years, protecting the structure from moisture throughout.
Do you renovate only the balcony floor?
No. Where needed, we also repair the slab edge, reinforcement, façade joints and damaged parts of the concrete façade. We define the scope at the inspection.
Let us discuss the project
Find out what your repair will cost.
Send us the address and what worries you: cracks, leaks, rust. We’ll get back to you, clarify the scope and book a free inspection.
A specialist’s site visit and initial inspection are free of charge.