You have bought the perfect flooring. You have stopped the dog from getting in the room and shifted out all the furniture. You’ve even spent three days intermittently watching YouTube videos that state “Lay Any Floor in 15 Minutes” with the confidence of a toddler mid sugar rush. But then you hit a snag:
The boards don’t sit flush.
The tiles rock.
The vinyl is already bubbling.
So, why isn’t your floor level? And more importantly, what went wrong?
Let’s look at the most common mistakes people make before the flooring ever goes down.
You Skipped the Screed
Screeding might sound like a post-grunge band, but it’s the secret sauce to a smooth floor.
Screed in a thin layer of material, such as sand and cement, poured over your subfloor to create a level and even surface. Without it, you’re assuming that the old floor or concrete beneath your brand-new tiles are flat.
You know; it rarely ever is.
What happens if you skip screeding?
• Uneven floorboards
• Gaps between tiles
• Premature wear and tear
• Flooring that feels like it’s flexing underfoot
Even self-levelling compounds need the surface to properly prepped. Don’t make the mistake in thinking that the word “self” means that it’s some magic spell that does everything for you.
Not Inspecting the Subfloor Properly
A floor might look dry and solid at first glance. This doesn’t mean it’s ready. What you haven’t check for are:
• Hairline cracks
• Residual damp
• Dust or debris
• Old adhesive left over from previous installations
All these affects how your flooring, or your screed, will adhere. Perform a simple moisture test to save yourself from warped boards or mouldy underlay.
A 'Level' Floor Doesn’t Mean a 'Smooth' Floor
They’re not the same thing. I promise.
A floor might not be sloping, but it could still be full bumps, drips, and cracks. For flooring using LVT (luxury vinyl tile) or sheet vinyl, those marks will show through.
Before you lay anything, run your hand over the surface. Can you feel ridges or dips? If so, then you need to prep that surface.
Rushing the Floor’s Drying Time
OK, so you have got this far and though “but I’ve done all that”. You’ve screeded and primed like a pro. It looks banging. But you’ve only let it settle for a day and you’re already itching to lay those herringbone planks.
Rushing into installation before your screed or compound has fully cured is the fastest way to wreck your hard work. Trapped moisture can lead to more issues.
Rule of thumb?
• Traditional sand/cement screed: 1mm per day drying (in ideal conditions)
• Liquid screeds or fast-setting compounds: Check the manufacturer’s spec — some are ready in 24–48 hours, others need a week or more
Be Honest; did you do The Final Checks?
Before even thinking about laying your floor, always:
• Use a spirit level in multiple directions
• Tap for hollow sounds
• Clean the surface thoroughly; dust is like a non-stick coating
A little time spent double-checking now can prevent a full rip-up later.
It’s All in the Prep
The single biggest reason floors aren’t level is simple; the prep was mangled; or it was forgone entirely.
Great looking tiles and great material aren’t the be-all-and-end-all of all matters flooring. It doesn’t start there. It starts with the surface that you skipped over.
Want help deciding if your floor needs screeding? Need a sanity check before you pour? Get in touch; we’re happy to talk floors, lumps, bumps, and all.
If you wish to discuss flooring further, please don’t hesitate to contact us on: 01604 380 390 or email info@srgillbuilders.co.uk with any enquiry.
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