Do-it-yourself balcony roof repair on the last floor:

• What is the waterproofing of the balcony for?
• Selection of materials
• Preparatory work
• Floor waterproofing
• Wall waterproofing
• Ceiling waterproofing
• Waterproofing a wooden balcony

If earlier almost all citizens used a balcony to store old and unnecessary things, now the situation has changed. The apartment owners are trying to get additional living space, so they are refurbishing the balcony room. Some residents install a roof, others make glazing, others insulate the space, etc. However, this is not enough to get a full-fledged living space. Balcony waterproofing is required.

Why do you need a balcony waterproofing

The balcony is more susceptible to the negative influence of weather conditions than other areas of the apartment. Waterproofing will help protect the space from unpleasant moisture, fungus and dampness. If you use high-quality waterproofing materials and carry out the work correctly, you can provide the walls, ceiling and roof of the balcony with reliable protection.

In the overwhelming majority of cases (95%), a concrete slab acts as a balcony base. High-quality waterproofing of an open balcony makes it possible to increase the resource of a structure under the influence of an aggressive environment by one and a half times. If you do not do this, you can incur financial losses in the future.

Because reinforced concrete has a porous structure, and inside it there is an embedded metal element. At subzero temperatures, water enters these pores and begins to chip off metal microparticles. Corrosion sets in and the metal collapses. Waterproofing prevents destructive processes.

It is performed for floor slabs (processing from below and from above), parapet (steam insulation is made at the same time), roof (rafter system is processed).

If you understand the importance of this operation, go ahead and see how to make a balcony waterproofing in accordance with existing technology.

Balcony repair and waterproofing prices

How to order repair of the roof of the balcony of your apartment or house?

An application for sealing work can be made by phone 1-2 working days before the start of work. Works on sealing interpanel joints are performed during the day from 9-00 to 19-00 You can call us by phone, +7 (499) 179-24-93 or you can ask your question directly from the form on the website: Order Important! We do the balconies repair work according to the rules: / How to write an application for the repair of a roof in an apartment building / Who should repair the roof of the balcony / The roof of the balcony rattles what to do? / Repair of the roof of the balcony on the last floor with your own hands / Installation of a structure on the roof of the balcony / Repair of balconies of the last floors in Maryino, Pechatniki, Vykhino-Zhulebino / Sealing of balconies on the last floor / Our work on facade work

Balcony waterproofing materials

First, we will deal with the necessary materials.

It all depends on the finish of the balcony structure. If the surface of the balcony is concrete / wood, penetrating compounds are used. If polyurethane / stone / tile is present, a coating material is used.

The types of waterproofing materials are as follows:

• Cast insulation;
• Glued insulation;
• Paint insulation;
• Impregnation.

Any of these materials will perfectly protect the balcony space from the negative effects of water / moisture.

Cast insulation is water-repellent. When choosing it, a heated polymer is used. The floor of the balcony is processed by it. It can quickly become damaged and lose integrity.

Papered insulation means material in the form of a roll. It is overlapped on all balcony surfaces. The joints are processed with a special mastic. To give the waterproofing strength and effectiveness, it is installed in several layers.

The paint insulation is characterized by ease of use. Another plus is the low cost of the material. However, we do not recommend using it for wooden surfaces. At sub-zero temperatures, it can crack and you will have to update the waterproofing layer.

An excellent material for waterproofing wood / concrete surfaces is impregnation. It penetrates inside and ensures the safety of the structure. However, when treating wood surfaces, warm and dry weather is required. The applied impregnation should dry well.

Self-sealing and waterproofing balconies.

At the end of repair work on loggias and balconies, the need for mandatory waterproofing and sealing of joints should not be underestimated. Usually, during construction, the balcony slab is installed with a slight angle of inclination, sufficient for precipitation to flow away from the wall of the building. But in the process of foundation shrinkage, the vertical deviation can occur up to two to three degrees, which practically stops the water on the slab from draining and it accumulates near the interface between the balcony floor and the facade slab. If, during the operation of the building, the geometry of the tin cornice on the balcony slab was violated, or it was not installed for any reason, water leaks along the lower, ceiling part of the balcony slab and enters its joint with the front slab of the lower floor. Thus, when waterproofing on the balcony, one should not neglect the sealing and the seam in the upper part of the slab, that is, above the balcony door.

If the sealing was not carried out properly, that is, without replacing the waterproofing materials inside the seam, then there is always a risk that after a while, in the event of mechanical damage to the insulating outer layer, water will enter the seam, destroying the material that remained unreplaced. construction. The fact is that the previously used materials did not meet the durability requirements that are imposed today, but they significantly reduced the cost of building the building, which, in terms of the entire perimeter of the building's seams, amounted to a very significant amount of savings for the contractor construction organization.

Preparatory works for waterproofing the balcony

Having chosen the material, let's get to work. You can entrust it to a specialist, but waterproofing a balcony does not require special qualifications, you can do it yourself and reduce the repair budget.

In addition to the preparatory stage, there are three more: treatment of the floor, the inner surface of the room, the canopy / roof / gutters.

Preparation includes the following types of work:

• We dismantle the old coating;
• We analyze the condition of the concrete base, determining the places of disrepair;
• We remove them with a puncher;
• We clean the surface from debris with a stiff brush and remove the remnants of cement / old glue;
• We process the cracks with a grinder. This is necessary for the new screed to fill all kinds of voids. We expand a small crack, we trim a large one;
• At the exposed reinforcement, we clean the rust with chemical compounds and remove the remnants of concrete;
• We cover the reinforcement with an anti-corrosion compound;
• We prime the floor surface;
• We fill the holes with cement-sand mortar;
• We examine the roof of the balcony and determine the possible places of water penetration;
• We clean the surface of the ceiling / walls;
• We apply a primer with a waterproofing material.

Causes of leaks on the balcony

A balcony roof leak may appear due to the following reasons:

• the presence of cracks on the balcony visor;
• worn out waterproofing covering of the visor, especially this is often found in buildings related to the old housing stock;
• violation of technology when carrying out work on the glazing of the balcony;
• improperly installed ebb;
• poor-quality waterproofing of the junction of the balcony visor and the load-bearing wall;
• the visor above the balcony has a reverse slope, which causes stagnation of water.

Any of these reasons requires an urgent solution, since the presence of moisture leads to the destruction of the balcony slab. In buildings with a long service life, it is likely that a complex balcony repair will be required.

Balcony floor waterproofing

Waterproofing the floor prevents moisture from entering from below. This is especially important for the owners of apartments located on the ground floors of buildings. Moisture can be from the basement / ground. We clean the floor from debris / dust and create a concrete screed. If the balcony is open, its slope must be 2% so that the water flows freely from the surface. We reinforce the screed with a metal mesh.

For sealing, fill all the seams that appeared in the process of work by 50% with mastic. We clean the screed from debris / dust and apply WB primer on it to ensure good adhesion. Cover the wetted concrete with several layers of polyurethane mastic.

We are waiting for the insulation to dry, and we overlap the vapor barrier material made of foil. This prevents condensation from occurring. We put a wooden frame on top. The OSB plate is attached to it with self-tapping screws. Finishing work - installation of finishing material on the balcony floor.

The thickness of the waterproofing must not be less than 20 mm and must extend up to 200 mm on the walls.

Wall waterproofing on the balcony

Before carrying out waterproofing work with a grinder, we select U-shaped grooves in the interpanel seams and seal them with Germoplast. By doing this, we eliminate leakage through microcracks. Then we fix decorative coatings.

Then we glue the foil polystyrene foam tightly to the wall. The second option is ordinary foam, which is covered with a layer of vapor barrier film. Joints are formed between the foam sheets. We seal them. To reliably protect against moisture, apply 2 layers of mastic.

Partitions

It is possible that there are additional partitions / other structures on your balcony. Then they should also be waterproofed. The principle of operation is similar.

We recommend to additionally cover the walls with expanded polystyrene, and use a coating / penetrating compound as waterproofing.

Waterproofing the ceiling on the balcony

We clean the ceiling slab and treat it with an antiseptic to protect the structure from the formation of fungal mold. Then the surface is treated with a coating / penetrating insulating compound. We seal up all the cracks and cracks in the ceiling with silicone.

Fill the joints of the wall with floor slabs with a sealant. When finishing the roof with tiles / metal tiles, each joint is additionally treated with polyurethane mastic.It has good adhesion and is easy to apply to damp ceiling surfaces. We recommend two layers of mastic. The second layer should be perpendicular to the first. After the first layer, the waterproofing layer is reinforced with a mesh. We give the mastic 3 days so that it dries well and hardens. This will create a strong crystalline protective layer.

For residents of the last floors, we recommend laying a layer of roofing material on top of the balcony roof or covering it with roofing mastic. We recommend calling a specialist to waterproof the roof. We do not recommend doing this work yourself. It is life-threatening.

How to waterproof a balcony roof?

Waterproofing the roof of the balcony is practically the only way to avoid moisture penetration into the room. If we are talking about rooms located on the top floor of the building, then it is worth conducting it both inside and outside. A full range of waterproofing works should not be limited to sealing all seams and joints with sealants. You can also use a waterproofing compound on the roof itself, equip the upper and lower ebb tides, hermetically fitting them to the walls and the base of the upper balcony slab. Owners of loggias with frames and wood trim should also saturate the surface of the wood elements with a water-repellent varnish. In the case of concrete canopies, polymer mastic or polyurethane sealant is used. Every gap and every junction, especially the joints between the roof and the wall of the building, should be carefully processed.
If you have chosen polyurethane foam while glazing the balcony, then you should certainly get rid of the excess of it, and then, again, use a sealant. Often, before laying the roof, it is covered with insulating material. It is laid directly on the frame, after which the roofing material is laid. This is followed by the very waterproofing of the roof of the balcony, after which its interior decoration.

In the event that the base of your balcony is concrete, then you should carry out waterproofing measures as follows. first, you will need to thoroughly clean the concrete. Next, lay the materials themselves, for which you can choose a substrate roofing material, plastic films, etc. The vapor barrier must be laid in a continuous layer, winding it over the insulation. The last can be mineral wool stone slabs, equip them in several layers with a thickness of about 150 millimeters. Use bitumen mastic to fix the slabs to the base, fixing them with telescopic dowels. The protective layer is made of bitumen-polymer deposited materials, which are fixed using a gas burner. Remember that protecting the balcony from moisture is very important, and this can only be done by waterproofing its roof.

Waterproofing a wooden balcony

Waterproofing a wooden balcony involves treating the boards with a special antiseptic to prevent strong moisture and the appearance of fungus on the surface. It is allowed to cover the floor with a wall with liquid rubber on the base, followed by processing with a finishing material.

Waterproofing prevents the development of mold and reduces the decorative effect of the tree. The material will begin to lose strength and attractiveness. Deformation of the coating will occur and it will be impossible for it to return to its previous appearance. Waterproofing a wooden balcony will prevent swelling and will prevent cracks from appearing that will lead to structural failure.

The technology of work depends on the functional purpose of the balcony and its type.

In this article, we examined the process of self-waterproofing a balcony. We hope you can use the above technology.

Types of wooden balconies in a private house

For low-rise cottage buildings, the following options for wooden balconies will be most acceptable:

• with a load-bearing slab embedded in the wall, on which a wooden fence is being erected;
• supported by reinforced concrete, wooden beams or metal brackets;
• on supports;
• above the bay window;
• over the room.

Each of the above types of extensions has its own characteristics, the accounting of which is best entrusted to specialists during the construction phase.