Introduction
We are able to offer our specially formulated, exposed aggregate “Screedcrete” mixture for application to fabricate beautiful hard wearing, non-slip, low maintenance outdoor floors.
Our “Screedcrete” exposed aggregate mix designs are offered in a diverse colour range, and aggregate size in either a 6mm or 13mm size, encompassing 8 standard colours. The thickness of application as a screed, ranges from a minimum 16mm up to 30mm in thickness. Natural pebbles can also be incorporated for a smoother texture (Especially suited to out door patios or piazza areas around swimming pools or in a sauna, where the slip-resistant features of the product are highly beneficial).

Trial panel to be undertaken
The clients approval of a sample panel, of the batch supplied, is essential before doing the entire job.

Shuttering/ aluminium strips
Aluminium strips must be firmly secured to the floor at recommended panel size intervals (please refer to step 2 for internal flooring ‘recommended thickness’s’) creating a grid. The right angled strips are fastened to the concrete floor with plastic wall plugs and countersink screws.

PREPARATION OF THE SUBSTRATE AND PLACEMENT OF SCREEDCRETE
Apply a thin primer slurry (pure matching coloured cement and UFT bonding liquid mixed to a creamy
consistency) evenly on the floor area with a builders block brush to ensure proper bonding between the floor and screed. While this slurry is still moist, apply the Screedcrete on top of the slurry and trowel it level, to the top of the strip / shuttering. It is imperative that the Screedcrete mixture be placed on top of the slurry while it remains moist (i.e. within ±20 minutes of applying the slurry) to ensure proper bonding between the concrete substrate and “Screedcrete”. The Screedcrete should be mechanically mixed using only ± 13 litres water per 160kg of screedcrete (mixture ie 4 x 40kg bags). Place alternate panels to allow ease of application. After initial set ± 1-2 hours after trowelling (trial an area) use a fine wire bristled brush and hand brush the surface to expose the surface aggregate to a “uniform depth and exposure”. All excess surface filler that is brushed loose, must be swept to a point and must be discarded asap. Ensure each panel is brushed out to the same depth and must be uniform in appearance. After ± 4-6 hours after brushing and exposing the aggregate use small amounts of clean water and a builder’s block brush and lightly wash the surface after application. Should there be any remnants of cement residue on the exposed aggregates brush the area with a mild solution of SQT Terrazzo and Cement Cleaner a day or two later, diluted about 1-10 (1. Parts SQT to 10 parts water) or slightly stronger if necessary, to get the stone clean and thereafter rinse the area thoroughly with clean water. The day after application, flood the newly placed panels with water to allow for proper curing/hardening of the concrete and try to avoid drafts and direct sunlight on the panels, by covering with plastic sheeting for seven days.

SEALING – THIS IS OPTIONAL

Sealing is optional with “Screedcrete”, exposed aggregate.
A sealer enhances the colour of the natural stone and makes it easier to maintain and is usually applied approximately 7 days after installation. (once the floor moisture content is less than 5%). The area can be sealed provided it is clean and dry. Use 1-2 coats UFT Concrete and Stone Sealer, for an enhanced colour appearance. These products are available from Union Tiles and must be applied evenly with a lamb’s wool roller. (Allow approximately 20 minutes drying, time between coats). The sealer may need to be reapplied every ±4-5 years depending on foot traffic and weather conditions and exposure to sunlight.