In this article we will consider the question of how to glue wood to concrete. Many people who have started renovations in an apartment or house certainly face the problem of combining these materials.
The need for gluing such materials is seen when bare cement screed laying wooden flooring or installing baseboards yourself, installing wooden fillets, etc. But, from time to time, fasteners are needed for more substantial and weighty objects, and this results in additional difficulties.
Fastening methods
Over the long history of construction work Many methods have been tested for attaching wood to concrete. Among the current and widely used methods, we note the use of specialized assembly adhesives and the use of fastening hardware.
Let's look at the highlight of the implementation of these methods and find out which specific materials are optimal for the purpose of carrying out similar work.
Use of specialized adhesives
If reinforced concrete was cut with diamond wheels, and now you have to install wooden parts that are small in size and weight, you can use special assembly adhesives.
A correctly selected adhesive composition allows you to reliably fix not only baguettes or baseboards, but also overlays on stair steps. But, you need to understand that the range of adhesive compositions is wide, and therefore you can count on the optimal result only if you select the right product.
If you need glue for concrete and wood, pay attention to the following compositions:
- Construction adhesive “Liquid nails”- it is relatively inexpensive and at the same time effective solution to work with materials of interest to us. “Liquid nails” are presented on the market in several modifications, in particular, “Universal”, “Express”, “Super strong”, “Very durable”, “For panels”, etc.
If the question is how to attach wooden block to the cement wall, the best choice would be a very vicious and universal modification.
The universal type of glue “Liquid nails” is a good choice for interior use. For example, with this method you can successfully glue wall panels made of lumber to previously cleaned and dust-free concrete.
But in case you are interested in how to glue wood to concrete when sub-zero temperatures, you will need “Liquid Nails” that are very strong with a gripping force of up to 70 kg per 1 m?. This glue will also hold the wood on uneven concrete at temperatures down to -17°C.
- Glue "Moment"- This a large assortment different compositions with different technical and operational properties.
Of particular interest is the “Epoxylin” modification, which is a two-component composition that works with a wide range of materials including concrete and wood.
After drying, the composition not only reliably holds the glued surfaces, but can also be sanded or subjected to other machining without compromising adhesive strength.
Another modification of the Moment glue, with which it is possible to connect concrete with wood, is the Joiner Moment. This product has found wide use during styling floor coverings made using lumber.
Polyurethane foam is a good option for simple and effective gluing
If necessary, it can be used as glue polyurethane foam increased strength. This good decision for floor coverings wooden coverings, installation of window sills, wall panels etc.
This method of connecting two surfaces is characterized by a number of advantages, including:
- affordable price compared to other adhesives;
- greater strength of the connection after the composition has completely dried;
- low degree of thermal conductivity, which is important when finishing floors and walls;
- excellent soundproofing qualities;
- hydrophobicity;
- biological stability;
- simple instructions for use.
But there is also a significant drawback, in particular the long drying time of the foam. Therefore, within 5 minutes. the glued part will need to be held in the desired position so that it does not move away from the surface.
Fundamentally important: In order to ensure optimal contact between the surfaces to be bonded and the foam, they must be lightly wetted with water.
Surface preparation is the key to success
Whichever of the above compositions you choose, before attaching wood to concrete, both surfaces must be properly prepared. In order for the installation work to result in a strong and durable connection, both surfaces must be as smooth as possible, dust-free and grease-free.
The main problem is the porous structure of the material, especially if diamond drilling of holes in concrete was carried out. This property is a circumstance of excessive absorption of adhesives, and therefore the connection does not have time to gain the proper strength.
It is not difficult to make a coating from concrete that is predisposed to gluing; to do this, it is necessary to reduce the number of pores. Primers are used for this. deep penetration, which seep into the porous structure of the material and solidify there. As a result, the micropores close, and the density of the concrete allows the use of glue.
It is fundamentally important: Wooden parts should be glued to previously prepared cement bases in strict accordance with the instructions of the manufacturer of the adhesive compositions.
Fastening using dowels
If you need high-quality and durable fastening of a wooden pole to concrete, simple glue or foam is not enough. In this case, it is possible to use fastening iron products designed for high mechanical loads.
Heavy wooden parts can be attached using dowel nails and anchor bolts. The principle of operation of these fasteners is similar, since after they enter the concrete, their working part begins to burst. As a result, fastening wooden poles to the cement base it turns out to be very durable.
Conclusion
There are many ways reliable connection cement surfaces with wooden parts, but greater strength will be guaranteed if preliminary preparation. There is no need for priming and dust removal of concrete if a connection using dowels is used.
You will find more informative and necessary information by watching the video in this article.
It is possible to glue materials of different compositions, you just need to choose a suitable adhesive base. It would seem how you can connect concrete and metal, or attach glass to it, but this is done using special adhesive solutions and funds. During the construction of houses and their subsequent finishing, it is supposed to be glued to concrete various surfaces, including concrete to concrete and sometimes not only the decorative part, but also the stability of the walls of the room depends on the reliability of their adhesion.
How to glue concrete together
During the construction process, moments arise when it becomes necessary to glue together concrete structures. Concrete – fake diamond, which can be glued with epoxy or furyl adhesives.
For structural rigidity, it is knocked down from old concrete upper layer, and then it is thoroughly cleaned, small particles of dust and debris are also removed from its surface and a portion of a composition containing glue and hardener is applied. It is spread over the gluing surface with a spatula or brush and a new concrete structure is immediately laid on it. To glue it together, resin compounds are used, which are used in the cold method.
Selecting a binder for plastic, as well as plastic and PVC panels
For gluing the latter to a concrete surface, the multi-purpose “Moment Germent” is well suited, which can properly glue these two surfaces.
Plastic is connected to concrete using conventional Titan construction adhesive, which has excellent adhesion and moisture resistance.
Also, “Liquid Nails” are well suited for gluing plastic surfaces with cement. This glue can be purchased in the form of a dry mixture, which consists of cement and polymers.
For reliable adhesion of two different designs it is necessary to clean the concrete surface, putty and level it, otherwise the smooth plastic surface will not stick. PVC panels are pressed to the concrete plane using building level and aligned along the entire length, adjustment of their location can be carried out within an hour. The glue will completely harden only after three days.
In construction, it’s a good idea to know about
Wood, laminate, plywood, parquet and sandwich panels
Modern adhesive materials make it possible to glue even wooden surfaces. Before carrying out this work, it is necessary to prepare cement surface and walk over it with a special primer, which will subsequently protect the joints from the accumulation of dirt and moisture.
To parquet board was securely fixed to the floor, epoxy or polyurethane glue was used. The latter consists of a hardener, solvent and filler. It comes in both solid and liquid states. Most often used in the form of liquid quick-setting mastic. It has good sealing and electrical insulating properties, but if there are sudden changes in air in the room, it is better to replace it with epoxy glue. 
Ruberoid
At the beginning of construction, literally at the final stage of constructing the foundation, the question arises of its sealing, which roofing felt can provide. It is attached to concrete using bitumen mastic. It is applied with a roller to the cement surface. Then, together with the roofing felt, it is heated for better adhesion and glued, placing improvised weights on top.
Metal with stone
Even such incompatible materials can be glued. Their reliable binder can be a two-component epoxy composition. It contains:
- mixture epoxy resin with filler and plasticizer;
- combination of thixotropic additive and hardener.
New technologies make it possible to fasten seemingly incompatible materials. When carrying out the gluing process, you should carefully prepare the working surfaces and select the appropriate adhesive composition. Some of its types can only be used for interior work, while others serve well in hostile environments. Maintaining the order of work and right choice materials will guarantee excellent results.
Concrete is an irreplaceable material. To work with it you need to use quality equipment, adherence to technologies for working with it, the use of qualified labor and, of course, the selection of reliable and modern adhesive mixtures.
There are different adhesives on the market today for working with concrete. All of them are ready-made mixtures, which include additives, fillers, and cement itself.
Choosing adhesive for cellular concrete blocks
- Hercules for cellular concrete it is worth highlighting among the highest quality and inexpensive. The solution is used in the construction of external and interior walls from highly porous materials, including cellular concrete. Also suitable for eliminating small defects in walls and floors. Before use, the surface must be sanded, dirt, lubricating oils, and bitumen removed. The preparation of glue is carried out by dissolving the powder in water and thoroughly mixing mechanically or manually until a plastic mass is obtained.
- Volma-Block which is designed to eliminate cold bridges at joints. It is used both for installation of gas and foam concrete, and for laying walls. The solution is easily mixed and applied to a clean surface, which, if necessary, is leveled in advance with the mortar mixture. The finished mixed mixture can be used within three hours, and the glued blocks can be adjusted within ten minutes. Operating temperature range +5…+30С. The glue must be stored in dry rooms on wooden pallets.
When working with any glue that contains cement, you must be careful, be sure to use work clothes, gloves, and protect your skin.
Cellular concrete blocks are held together with special dry mixtures of quartz sand, Portland cement, and additives to improve thermal insulation properties and strength.
Their advantages over simple mortars:
- possibility of applying a thin layer up to 3 mm,
- higher strength and water holding capacity,
- reducing the number of cold bridges.
Preparation of the composition begins by pouring the contents of the bag of powder into water.
- Mixing is done using a drill or stirrer.
- The resulting solution should be thick, plastic, and not spread when applied.
- For use ready mixture is given for about three hours, after which it begins to thicken and requires repeated stirring.
The main problem that one has to face when gluing anything to concrete is the extremely low adhesive ability of this material. Simply put, taking plywood, linoleum or MDF and gluing it to concrete will not work. First you need to strengthen the adhesion of concrete, and then glue the required material.
How to glue plywood and linoleum to concrete
It is better to increase the adhesive properties of a concrete surface using a primer. After which you can safely glue the plywood to the concrete with any good parquet adhesive. If you need to glue plywood to concrete on the floor in a utility room, inexpensive glue for water based or elastic polyurethane adhesive composition. In some cases you can use double sided tape, for example, Dublfix. When plywood is glued to a concrete floor under parquet, to ensure the strength of the fastening, it is worth using a two-component adhesive. The adhesive compositions Bona, Adesiv, Kiilto have proven themselves well.
If we talk about linoleum, then double-sided tape can again be used as an adhesive. This is perhaps the easiest option to glue linoleum to concrete floor. High traffic hallways and corridors will require more reliable way covering fastenings. Special mastics are suitable here. Elastic and well fixing linoleum, they are inexpensive and do not leave a smell. If the floor screed has defects, they will be eliminated bitumen mastic. It glues perfectly and levels the floor at the same time. Mastics that are recommended for residential premises include: Gumilax, Homakoll, Omega Bustilat.
Regardless of how you adhere linoleum to concrete, the surface must be thoroughly cleaned before applying tape or adhesive. Before applying the mastic, also treat it with a primer. When using mastic, a layer of 0.4-0.5 mm of glue is sufficient for reliable fixation.
How to glue panels to concrete (wood and MDF)
You can glue panels to concrete, no matter if it’s MDF or PVC, using liquid nails. To do this, large drops of liquid nails are applied to the panels along the perimeter every 10-15 cm. It is advisable to wait a few minutes for the glue to thicken, and then glue the panel to the concrete. Liquid nails are adhesive composition Water-based, so there is no strong odor left after gluing.
The second option for gluing wood or MDF to concrete is to use double-sided tape. This fastening method is suitable for thin small structures, e.g. ceiling panels or wooden slats. However, if possible, it is better not to glue the panels to concrete, but to install them on lathing or fasteners. This is a more reliable and durable option.
In any case, in order to glue MDF or wood to concrete, the surface of both concrete and wood must be cleaned, degreased and primed.
Today there are many floor coverings, however, time-tested wood has not lost its relevance and is still very popular. As a result, many home owners decide to install wooden planks on top of a concrete screed. This procedure not too complicated, but requiring certain knowledge, so next we will look in detail at how to install a wooden floor over concrete.
Installation wooden planks
General information
Often, before making repairs, people wonder which floors are better - wooden or concrete?
At first glance, concrete floors may seem more practical for the following reasons:
- They do not rot, and as a result are more durable;
- Over time, they do not begin to creak, unlike a wooden floor;
- They have good strength.
- They are moisture resistant, etc.
However, it is no secret that a concrete floor is colder than a wooden floor and, of course, less comfortable. As for the disadvantages of plank flooring, such as a tendency to rot or loosen and squeak, then if modern technologies installation, they cease to be a problem.
Therefore, when deciding which floor to lay - concrete or wood, you should take into account the operating conditions. For example, in a bathroom or kitchen it is more advisable to use a concrete screed coated with, for example, tiles. But in a living room or bedroom, where comfort and coziness come first, it is more advisable to cover the floor with wood.
Technology of laying wooden floors on concrete
Now let's take a closer look at how to lay a wooden floor on a concrete base.
It should be said right away that there are several installation technologies:
- Gluing boards to concrete;
- Laying on joists;
- Laying on plywood;
To choose the appropriate technology, you should familiarize yourself with each one, which is what we will do next.
Leveling concrete with self-leveling mixture
Preparing the base
Before laying a wooden floor on concrete, you need to prepare the base, regardless of what installation technology will be used. Preparation consists of drying the screed if the floor was recently poured and leveling it. If the surface of the base has bumps, then they can be removed by grinding; if there are “pits”, then such a defect can be most easily eliminated using a self-leveling mixture.
Note! Proceed to installation work This is only possible if the moisture content of the screed does not exceed 3 percent.
At this stage, you should also make holes in the concrete for communications, for example, sewer or water pipes, cables, etc. Most effective way is diamond drilling of holes in concrete.
If the room area is large, then in a freshly poured screed you should perform expansion joints. For these purposes, reinforced concrete is cut with diamond wheels. The final stage of preparing the base is coating the surface with a primer.
Impregnation will serve as waterproofing and will also prevent the occurrence of fungus and mold under the wooden floor. A one-component polyurethane primer mixture is usually used as a primer. After the primer has dried, you can begin installing the floor yourself.
Gluing boards to concrete floor
Installation with glue
This technology consists of installing boards directly on a concrete base. Recently, it has been the most common way of laying wooden boards on a screed.
True, installation can only begin if the base complies with SNiP 3.04.01-87. If the concrete is loose or contains cracks, it is necessary to use special strengthening primers or cover it with a separating substrate, for example, Multimoll Vlies.
If it is intended to lay wide solid boards, then a modified elastic one-component polyurethane adhesive is used to glue the boards. Installation of narrow solid or engineered boards is carried out using two-component polyurethane adhesive.
Polyurethane glue
The installation of a wooden floor on concrete in this case looks like this:
- First of all, you need to measure the room and cut the boards to the required length.
- Then, starting from the wall opposite the entrance, glue is applied to the surface of the base and leveled with a notched trowel. The layer thickness should be no more than 3 mm.
- Next, a board is laid on the glue-coated surface and pressed over the entire area.. In this way, 2-3 rows of boards are mounted. When laying boards, they must be tightly joined in the longitudinal and transverse directions; for this you can use tightening belts or wedges.
- After the glue has polymerized, the remaining boards are laid. In this case, the boards of the last row must be cut to width.
Note! A gap of at least 15 mm must be left between the walls and the coating.
The photo shows the lag installation diagram
Installation of floors on joists
This technology involves installing boards to wooden joists(rectangular bars). It can be used for boards with a thickness of 20 mm or more. Thinner boards should only be mounted on plywood.
The installation instructions are as follows:
- The joists are attached to the concrete floor using dowels and screws. In this case, their caps should be recessed several millimeters below the surface level. The axial distance between the logs should be 25-30 cm.
It must be said that there is another way to attach the logs - using adhesive and bitumen-containing mastics. This technology is justified if there is a possibility of damaging communications when drilling concrete.
- After installing the logs, it is necessary to level them. Places that protrude above the level must be removed with a plane. As a result, the deviation from the level should be no more than 2 mm per two meters.
Scheme of installing a wooden floor on logs
- Next, along the walls you need to lay soft wood-fiber boards, which will serve as a soundproofing gasket between the floor and the wall.
- It is advisable to fill the space between the joists thermal insulation material, for example, expanded clay or mineral mats.
- After this, the boards are installed, which are attached to the joists using self-tapping screws. Of course, nails can also be used for these purposes, but over time, such fastenings begin to loosen, resulting in a characteristic creaking sound when moving across the floor.
This technology is good because it allows communications to be carried out under the floor, as well as the use of insulation. However, the price of the structure increases, since in addition to the boards, it is also necessary to purchase beams.
Laying on plywood
Wooden floor on concrete base can be laid using moisture-resistant plywood with a thickness of 12-18 mm.
In this case, the procedure is as follows:
- Standard sheets of plywood need to be cut into squares measuring 40x40 cm or 80x80 cm.
- The resulting fragments are laid diagonally towards the future coating. Moreover, the gap between them should be about 4 mm. The plywood is first glued and then shot with dowels.
A distance of about 10 mm should be left between the edges of the plywood and the walls. The sheets are laid offset according to the principle of brick laying, while the heads of the screws must be recessed by 3-4 mm.
- Before laying plywood on a concrete floor, it is rough sanded.
- The leveled base should be cleaned of dust.
- Then the boards are attached to the plywood using self-tapping screws.
That's all the main points of installing a wooden floor over a screed. It must be said that in some cases it is necessary to perform the operation in reverse, i.e. pour concrete over the wooden floor. Most often in this case it is done concrete screed along wooden joists.
Sanding plywood
To do this, metal corners are attached to the side walls of the joists, onto which a reinforcing mesh is laid, and the space between the joists is filled with expanded clay. After this they pour concrete mixture, which should be higher than the lag level.
This technology is used in old apartments, in which wooden beams serve as floors between floors.
Laying a wooden floor over a screed is a completely accessible operation that anyone can perform House master. The only thing is that you must strictly follow the installation technology and do the work very carefully and accurately. In this case, the floor will be strong, smooth and durable (see also “Attaching wood to concrete: the main methods and features of their implementation”).
You can get more information on this topic from the video in this article.
