Page 91 - CFJ_Dec25

ADVICE & INFORMATION

Rob Russell

Surface prep can make or break a floor

Rob explains why mechanical surface prep is the difference between floor success and failure

ART of my daily routine is to inspect existing subfloor before applying new changing consumer preferences,
Psubstrates and recommend the best preparation materials. construction moisture challenges,
course of action to achieve the best Surface preparation is often regarded underfloor heating systems, and growing
results. The first and most important as the most critical stage in the whole environmental awareness. All of this
recommendation is that surface process. The overall failure rate can be underscores the importance of detailed
preparation should be undertaken to very high when floor preparation isn’t floor preparation.
provide a solid, sound, and smooth base. completed correctly. The ‘how’
This is achieved by using appropriate When preparing an existing substrate,
mechanical surface preparation there are various mechanical methods
equipment to remove any weak surface available. Even newly applied substrates
layers – such as plaster, residues often have some contamination due to
from other trades, dust, dirt, curing the nature of the construction process.
agents, resinous coatings, shiny or When assessing the type of surface
power-floated surfaces, loose or friable to be removed and what will be applied
material, or any other contamination afterwards, factors such as site
likely to impair adhesion. Doing so restrictions, availability of electrical
creates a surface that allows subsequent power, noise limitations, and dust and
products to perform as intended. debris control should all be considered.
The ‘why’ These will help determine the best
In short, to avoid system failure. Some machine and method to use.
materials react with other materials From handheld tools powered by a
and chemicals, and some substrates bit of elbow grease to durable shot
react when covered and therefore can’t blasters and multi-head grinders and
breathe. If a weak layer isn’t removed, polishers, there’s a wide range of surface
the overall strength of the installation preparation machines on the market.
will only ever be as strong as its weakest Let’s look at some of the main processes
point. To deliver the best outcome every and tools available:
While some smoothing compounds time, we now have greater knowledge Scrapers or strippers: The oscillating
in the UK can be applied directly over than ever before – along with tools that blade movement mechanically removes
certain well-bonded adhesive residues, make the process quicker and more floor coverings and adhesive residues.
in Europe a more thorough approach economical. The UK flooring industry They’re also very effective at removing
is often considered best practice. This has evolved significantly in recent years, rubber, felt, and fleece-backed carpets
typically involves removing more of the driven by technological advancements, quickly. 

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Different Approach

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@CFJMagazine CFJ December 2025