The Boulevard, an upmarket commercial glass building situated in Woodstock, Cape Town, required a refurbishment to ensure the structure was of sound integrity.
Sealing glass windows
To reseal around the glass windows from concrete to frame, Sikaflex-AT Facade, a high-performance elastic joint sealant, was used. This product is designed specifically for joint sealing of movement and connection joints, porous and non-porous substrates.
Offering excellent workability characteristics as well as low stress to the substrate, it is solvent-free and silicone-free and although primeless adhesion on many substrates is possible with Sikaflex-AT Facade, the extreme weather exposure of this building necessitated the specification of a primer.
Coating exposed concrete
In addition, the exposed external concrete of the building was laden with cracks and pores, resulting in water forming internal ponds. To address this, Sikalastic-152 was applied as a two-coat system at a 3mm thickness.
Sikalastic-152 is a two-component, fibre-reinforced mortar, with a low elastic modulus, based on cement and modified with special alkali-resistant polymers. It contains fine particle-size selected aggregates and adequate additives for waterproofing and the protection of concrete subgrades.
An earthy finish
The client required an earthy, more natural look for the finish and consequently a final coat was applied including a stipple finish incorporating river sand in the Sikalastic-152 to achieve the desired effect, completing the main waterproofing element of the structure.
Tel: 031 792 5600
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