Choice of bricks is the first step towards the fitting of a new bathroom. However, your dream will come true only if you properly prepare a base, choose suitable materials and glue the bricks at the highest quality possible.

Base preparation

The glued surface should be steady, dry, rigid and smooth, all the layers that reduce adhesion especially dust, filth, lime, grease, polish, oleaginous paint, emulsions or bituminous mastic as well as other remainders of materials that reduce cohesion should be removed. Bigger base bumps should be fixed with smoothing aggregates. If you are about to glue a surface that has a strong absorbtion to moisture, you should make sure you have it primed.

If the bricks are glued on a painted plastic surface, you should indurate it with a sandpaper. A concrete surface should be covered in no sooner than one month.

Glue

For each type of bricks there is a different type of glue manufactured. One can be for ceramic wall bricks, other for ceramic floor bricks or even for stone mass bricks, glass mosaics. It is more reliable to go for special type of glue to make sure the bricks do not get unglued for a longer amount of time. Universal glue can also be found, though it is recommended to go for the special ones.

Whilst gluing on stable, stiff and water resistant wooden surfaces or just on old ceramic bricks, specialists recommend to use the glue solution for an increased cohesion and elasticity or to mix elastic emulsion into the glue solution.

Dry glue is poured in to a cool, clean water and mixed till a smooth mass is achieved. Large quantities should be mixed with an electric stirrer whereas the small ones manually. The time after which the mass should be remixed and suitable for gluing can be always found on the packaging of the product.

Filler for gaps in bricks

Fillers can be used for fixing the gaps in newly covered surfaces or maintained old surfaces. Small gaps between ceramic bricks, ceramic mosaic are filled with a coloured mass. The fillers of brick gaps are divided according to the gap width that is needed to be filled, mechanic and chemical resistance, elasticity. Fillers for narrower, 1-4 mm gaps are of a smaller fraction and the surface fixed with those is smoother, however the level of moisture absorbtion is bigger, they are more brittle and less resistant to mechanic effects. Fillers for wider gaps (with a larger surface facture) are normally more elastic, rigid and with a smaller absorbtion of water. It is recommended to use them outside, i.e for heated floor and pools.

Manufacturers define where to use the fillers, e.g. for decoration of walls, floor or universal brick gaps. They also offer a wide choice of colours to fill the gaps between the bricks, choosing the colour according to the colour of the bricks. In order to avoid a difference between the shades, it is recommended to go for the filler colour of the same number and the same manufacturing date.

A special seam filler is used for the fixing of concrete and lightweigh walls, to join wall and floor corners, to fill gaps between different materials as well as the separation of large areas in walls or floor in to the smaller ones.

Area temperature

During the working process as well as two days after the brick gluing, the temperature of solution and bricks should be no higher that +10 C. A low temperature and high moisture can extend the drying time of glue.

Tools

A castellated pallet should be purchased for the brick pasting. A 4,0 mm serration size pallet is most suitable for small bricks ( up to 10 x 10 cm with a smooth or easily profiled bottom side). A pallet of 6,0-8,0 mm size is most suitable for average bricks ( bigger than 25x25 cm). Another item that you will require is a cross (1 mm to 8mm width), a putty knife to fix the gaps between the bricks, a sponge to clean the remainders of the filler. A level will be required to ensure a required position of the bricks. Regardless of the chosen brick gluing method, specialists recommend to glue the bricks with backlashes. Crosses are used to make sure that the backlashes between the bricks are of the same width. The purpose of the crosses is not only to equalize the backlashes between the bricks but also to compensate the differences of brick dimensions of the same size. If the dimesions of the bricks are 300 x 300 mm, the crosses chosen for gluing should be no smaller than 3mm in width.

Gluing

A thin and continuos glue layer is applied on a prepared gluing surface with a use of a pallet with a smooth edge. Then, you apply a thicker layer whereas the area which is to be covered with bricks is trenched with a castellated pallet.

It is not recommended to cover a large surface straight away as the solution gluing properties depending on the base type are kept up to 15-30 minutes. It is always recommended to check if the brick can still be glued. This can be done by pressing the fingers of a hand on the already applied solution; if the solution remains on the fingers - the bricks can still be applied whereas if the fingers remain clean, the old layer should be removed and the new one should be applied.

The adjustment time of brick positioning can vary as it depends on the used glue. Specialists gluing the wall bricks have their own methods of doing it geometrically regularly. Here is one of the methods - whilst using a level, a regular horizontal line is to be drawn of the botton of a wall, a straight wooden line hammered according to it and the bricks glued straight.

Luting of thread

Once you glue the bricks, you should immediately remove the surplus of  glue which has taken  more than half  seam depth of the surface.

The backlash surface filled with filler should be of the same depth, smooth, the glue in between the bricks which remained after the brick pressing should be cleaned.

The wall brick seams can be filled within 1-2 days, the floor brick seams can be filled 2-3 days after the gluing. Before filling the gaps, they should be moistened with a damp spounge. It is very much important that the brick gaps are luted with fully dried glue or during maintenance whilst gluing on an old surface.

The prepared filler should be deeply and densely infixed between the gaps of bricks with a rubber pallet of shredder. If you want to secure the luted seam from pigment and fresh filler washing off, you should not moisten the filler between the backlashes too much. After the filling, ceramic bricks should not be cleaned in a dry method, as dry details,  rubbed into a fresh filler can change its colour.

It is recommended to moisten the backlashes two days after filling by sprinkling or washing with clean water. The real colour of the filler establishes approximately in 2- 3 days after it totally dries.

Decoration stripes are used for the backlashes present in special places (inner and outside corners, heated seams) or the blacklashes are filled with elastic material (for example, silicone sealant). If you want to reduce the water absorbtion of the filler as well as increase its resistance to pollution, when it gets totally dry, approximately within two weeks, it is recommended to impregnate it with protective agents.

Use of glued surfaces


The time when you can start using the glued surface depends on the glue, bricks and weather conditions. If standard glue was used for the gluing, it is possible to walk on the glued floor in within 1-2 days after its been applied, however on such floor you cannot run, work or load them in other ways. Manufacturers recommend to wait at least 3 days. If you use fast consolidation glue, you can walk after three hours already. You can fully upload the floor only after two weeks.