Q: Why use a proprietary product in lieu of sand cement Bond Crete mix?
A: Specialist products contain stronger adhesives and polymers not found in regular cement mixes.
Q: What’s the minimum depth of a repair screed?
A: Screeds can be as shallow as two millimeters, with a fall to feather edging. Select a screed that best fits purpose.
Q: Can I mix sand with a proprietary product to extend coverage?
A: Not recommended. Will compromise product performance.
Q: Why have cracks appeared in my screed?
A: Excess water in mix. Environment too hot to enable proper cure.
Q: How do I prevent moisture rising from the substrate through my screed?
A: Apply an epoxy moisture barrier to substrate.
Q: What is the difference between cementitious and epoxy products?
A: Cementitious products are usually used for general repairs. Epoxy products are best suited where stress and strength are an imperative.
Q: Where would I use the latter?
A: In heavy traffic areas and edges where stress is applied.
Q: Is a primer required when applying a screed?
A: Where substrate is in disrepair a primer is essential. Otherwise, a clean well-presented surface will suffice.
Q: What’s the difference between internal and external self-levelling compound?
A: Generally self-levelling compounds are suited only to internal use. Where external applications are concerned ensure you purchase a reputable product endorsed by the manufacturer for that use.
Q What is bony concrete and how can it be repaired?
A: Bony concrete occurs when the mix has excess water and/or the mix has not been tamped correctly. The offending area should be replaced.
Q: How do I repair rusted steel rods and concrete cancer?
A: There are proprietary products that will deal with these conditions. Seek advice from your local supplier.
Q: How do I calculate consumption of an aggregate mix for a given area?
A: Multiply the area by the average depth of your screed. Convert to litres and refer to the manufacturer’s instructions which will provide a weight/litres guideline.
