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All Lights On Surface Regularity

The topic of this article is the surface regularity. London flooring experts state that this may be not fully understood so some clarifications should be done. Despite the fact that surface regularity is a simple concept sometimes flooring contractors have a misconception that levelling and smoothing are one and the same thing. London flooring professionals explain that surface regularity is a method in which the variation of a screed is measured. It shows how much it varies from being completely smooth. How is surface regularity being measured? London flooring specialists clarify that a straight edge of 2m length is placed on the floor to check the undulation across a screeded floor. The deviation is measured in terms of SR followed by a number – the lower the number, the less wavy your London flooring is. Flooring experts will further explain them below.

  • Let’s start with the numbers. For instance, SR1 means that the deviation is no greater than 3mm underneath the straightedge; SR2 – no greater than 5mm; SR3 – no greater than 10mm. The people that are responsible for the SR classification are the main contractor and the architect. After that the screed is installed so it meets the SR tolerance. A reputable London flooring specialist says that is the screed doesn’t meet the classification, the screeds must be ground down to decrease the variations. Have in mind that SR classification is not something that the flooring contractor has input into. Another misconception is that how horizontal the floor is should be taken into account. In reality, you can have an SR1 classification on London flooring that slopes.
  • The SR classification depends on the use of the building/ screed. For instance, SR3 is easily achieved as it is basic in contrast with SR1 which requires more attention from the screeders. The type of London flooring also plays a vital role. Depending on different floorcoverings the level of SR needed will be different. For example, if you are installing tiles, the screed can be poor as the adhesive will ensure a good finish. However, when speaking of hardwood, it needs to be even better than SR1 as a very good contact between the timber, the adhesive and the substrate. Carpet and vinyl depend on the needed aesthetics for the specific room. They are flexible enough to follow the contours of SR2. Fortunately, manufacturers of subfloor preparation products provide solutions which can advance the smoothness of London flooring. If the products are chosen correctly they can even achieve an improvement on SR1 – the floor will be both level and smooth. But, of course, this is not that easily done – a lot of things should be taken into account such as the right amount of the product, before reaching the desired result.
  • To begin with, London flooring professionals point out that you should find the high spots on the flooring using lasers. Advice from reputable flooring contractors in London is to apply a minimum of 5mm smoothing compound above the high spot. After that packers should be placed around the flooring as datum points. Another option is to use a pumping system of water mix smoothing compound when larger floor areas need to be levelled. However, London flooring experts remind that thicker application layer will result in longer drying time – don`t be impatient to install the new floor!

Don’t forget to quote accordingly as this service is considered ‘special’. SR is not a responsibility of London flooring contractors that apply the final floorcovering. Being able to provide a high-quality solution is what keeps the industry thriving – the flooring trade needs professionals and problem-solvers that are able to tackle such tricky situations!

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