Handy Hints & Tips For Resin Installers
Jonathan Baxandall on resin flooring for refurbishment
RESIN flooring systems can be a good choice for refurbishment of old floors. A well-designed resin system installed correctly will provide a functional floor for many years.
However, when looking to take on a refurbishment project, there are a number of factors that need to be considered at the planning stage and during the application.
Here are some common issues a resin installer should consider:
I Old paint/resin coatings: These must be removed by mechanical means to ensure complete adhesion of the new system to the substrate.
If installed over an old paint system, new resin flooring adhesion to the concrete substrate will only be as good as the previous coating’s adhesion, which cannot be known.
Where possible, always remove old coatings.
I Surface contamination such as oil: Again to ensure complete adhesion of the resin to the substrate, remove the contamination either by cleaning or mechanical methods. Some resin flooring manufacturers provide specialist primers that better cope in these situations, so seek advice.
I Refurbishment of older buildings: Is there a functional damp proof membrane installed? If in doubt, consider measuring the moisture levels of the concrete screed.
Also remember that in low lying areas or in basements the water table may rise during the winter months to saturate the concrete base.
Using a liquid applied DMP will offer extra protection against damp substrate, but may not
hold back hydrostatic pressure if the water table is high.
I Cracked or damaged concrete: This must be made good before installing a synthetic resin topping. Expansion joints in the substrate must be reflected through the resin topping in the form of a joint.
‘Live’ cracks can also be dealt with. At Altro we suggest using a heavy duty fibre glass mesh embedded into the primer over the crack, thus protecting the resin topping to be installed above.
Old cracks that are no longer ‘live’ and small holes should be cleaned out and then filled, either with a fast-setting cement-based grout or patching compound, or a suitable filled resin system. Remember to prime the repair area before installing a ‘patching’ resin.
I Surface preparation: Even if the concrete surface appears to be clean and free from contamination, you should mechanically prepare the concrete to remove any dust or laitance and to expose a fresh substrate to bond the resin topping to.
Before installing the flooring, make a close visual inspection to verify cleanliness, soundness of the surface and freedom from soft areas or loose concrete repairs.
For further information on all aspects of substrate preparation before installing a resin system, consult FeRFA technical literature featured on its website. www.ferfa.org.uk
Jonathan Baxandall is regional technical service manager for Altro
T: 01462 489405
This article has been reproduced from the Contract Flooring Journal website. You can find them at www.contractflooringjournal.co.uk.