Homeowners discover that the existing concrete slab in the garage creates uneven surfaces and potential issues when they apply new flooring. The old slab may appear solid at first glance, but age, exposure, and previous use leave it prone to problems when topped with liquid screed.
We supply liquid screed in Oxfordshire for many such conversions. Our calcium sulphate-based mix flows smoothly and delivers a level finish that supports underfloor heating or standard floor coverings. However, success depends on more than delivery. It hinges on understanding how the new layer interacts with the old concrete beneath.
Why curling develops in these setups
Curling happens when the edges or corners of the screed lift away from the subfloor. Differential shrinkage drives this movement.
Without proper preparation, the liquid screed fails to grip the existing concrete firmly. Moisture imbalance then amplifies the risk. We address these factors directly when we assess sites for clients across the region.
Primer selection plays a decisive role. We choose bonding agents formulated for calcium sulphate liquid screeds that penetrate the old concrete and create a reliable interface. The right primer reduces the chance of delamination and helps control initial moisture movement from the new pour.
Screed thickness considerations for garage conversions
In many Oxfordshire garage projects, we increase to 40 or 50 millimetres. The extra depth improves thermal mass when underfloor heating is installed and offers better resistance to the stresses caused by temperature fluctuations. We never cut corners on thickness in these scenarios. A skimpy layer increases the likelihood of curling because it lacks the mass to counteract differential forces.
We also supply ready mixed concrete in Gloucestershire for clients who extend their projects across county borders. Our consistent mix quality supports both concrete bases and screed overlays in hybrid builds.
When fibre-reinforced liquid screed makes sense
We turn to fibre-reinforced versions of our liquid screed in Oxforshire for garages that will see heavier use or sit over particularly challenging slabs. The fibres distribute tensile forces more evenly throughout the material. This reinforcement reduces the risk of shrinkage cracks and limits the extent of any potential curling at the edges.
Fibre addition proves especially valuable when the old concrete shows signs of prior movement or when the conversion will incorporate underfloor heating. The enhanced flexibility helps the screed accommodate minor subfloor shifts without lifting. We select the precise fibre dosage based on the specific conditions we observe during our site assessment.
We encourage anyone considering a garage conversion in Oxfordshire to think carefully about the flooring stage. The existing slab holds the key to success or failure. Our team brings the expertise needed to turn potential problems into a solid, reliable base for the new room.
Contact us to discuss your garage conversion flooring requirements and ready mixed concrete in Gloucestershire. We will examine the site, explain the options clearly, and deliver material that performs as expected.