Waterproofing for swimming pools
Common issues and queries you can face
Step by Step solution
The cement base products are ideal for this application. The concrete is to be treated before ﬁxing the tiles and the following steps are to be considered:
PREPARATION OF THE SURFACE
Remove dust, oil and any remainders by using grinders and fresh water only; all substrate must be sound and clean.
PRESENCE OF HOLES
Mostly in newly built swimming pools, holes will appear caused by molding or else; such holes must be cleaned and damped. Use the plugging mortar weberdry 150 BLC and keep it moist for a period of 15 min. If any cracks are present, they can be treated the same way.
In some newly built swimming pools, honeycombing may be found occurred by concrete pouring or pumping. Honeycombing areas must be cleaned by removing all damaged concrete and existing laitance and the damp the concerned areas with water and use weberep 331 TX for ﬁlling honeycombing area and the cracks if any.
BIG HOLES AND DAMAGED CONCRETE
In the case of big holes or damaged concrete in old or new swimming pools, all damaged areas must be chiseled, cleaned and damped with fresh water. weberep 331 TX is to be applied in one or two layers depending to the depth of holes.
All joints between vertical walls and ground must be treated by creating a groove of 2 cm deep and 2 cm wide and reconstituted on the 90° corner an angle curve form in an appropriate thickness with a non-shrink thixotropic mortar like weberep 331 TX, at least 3 days before the application of weberdry 110 FX. In case it is impossible to have a curve form, open a groove of 2x2 or 3x3 cm, clean it and damp it with fresh water before ﬁlling it with weberdry 150 BLC.
The substrate of the concrete walls must be aligned in order to have the tiles ﬁxed, therefore, plastering work is to be applied after repairing work. Apply one coat of webepremix key coat on a thickness of 2 to 6 mm manually or by using a Tyrolienne spraying device.
For a better curing, keep spraying water twice a day. After 3 days of the curing process, apply one single layer of weberpremix ﬁber. Thickness can reach 15 mm and carry an additional 3 days of curing. In case more thickness is required to achieve the alignment, then scratch the ﬁnishing coat and apply another one following the previous steps.
The concrete ﬂoor has to be aligned as well, by using ﬂoor screed weberfloor 600 SCR. Mix 50 kg of weberfloor 600 SCR with 5.5 liters of fresh water and pour the mixed product onto the ﬂoor and spread it with a steel trowel for a thickness up to 50 mm. Control joints in the existing substrate should be respected. For large areas, joints should be created every 25 m². Avoid fast drying in case of hot temperature or wind by a regular curing process.
After assuring that all the above steps have been maintained, the swimming pool is ready to receive the ﬁnal product in the cement waterprooﬁng system, weberdry 110FX - the ﬂexible high-performance product is to be used in 3 layers:
- 1st layer with sufﬁcient thickness 0.5kg/m²:
- Use a brush or a roller.
- Fix 20 cm width of ﬁber mesh on all corners, joints and cracks while the waterprooﬁng layer is still wet.
- When dry, apply the 2nd and 3rd layer in proportions of 0.5-1 kg/m²
It is recommended that the tiling start one week from the application of weberdry 110 FX. When needed flood test on weberdry 110 FX can be carried out prior tiles fixing. Allow one week curing before flood test.
- 1st layer with sufﬁcient thickness 0.5kg/m²:
Walls and ﬂoor of the swimming pool are ready to receive the ﬁnal step of this system. The tiles are to be ﬁxed by using webercol flex as follows:
- Mix the two components of webercol flex by pouring the powder in the liquid progressively while stirring the liquid. An electric mixer with low rotation speed (< 300 rpm) can be used. Mix until a uniform lump-free paste is obtained.
- Apply webercol flex evenly on the substrate. Use a notched trowel to have the required thickness. Apply the tiles on the substrate and press them ﬁrmly, while making sure that the paste does not slip from the tile sides. webercol flex can also be applied on the back of tiles to ensure full adhesion on the entire surface.
After the ﬁxation of tiles, all the area must be cleaned with fresh water and kept untouched for 24 hours in order to allow the tiling to be set, then all the tiles joints should be ﬁlled with weberepox easy or weberjoint perfect. Apply weberepox easy or weberjoint perfect with a rubber spatula into the joints by ﬁlling all the gaps. Remove surplus grout with a damp sponge. Use the product within its
pot life, after mixing. When the grout is dry, clean the tiles with a dry cloth.