Can You Put Self-Levelling Compound on Wood Floors?

Get The Definitive Answer on Levelling Wood Floors

Can you put self-levelling compound on wood floors? If you’ve been looking into this, you’ve probably found more questions than answers. Some say it’s fine with the right product, while others warn it’s like screeding a trampoline.

Getting all this conflicting advice can be frustrating and leave you concerned about making a costly mistake. No more! You’re in the right place. This guide is designed to cut through all the confusion and give you a clear, pro steer on exactly what’s possible.

You need advice you can rely on, and that’s what Buxton Flow Screeds is here to provide. As one of the UK’s most established installers of flow screeds and levelling compounds for more than two decades, we’ve built our business on getting it right. We understand the properties of wood and the science behind the compounds, allowing us to give you clear, no-nonsense guidance that works in the real world.

Standard, cement-based levellers dry into a rigid, crystalline structure with very little give. So, applying this inflexible layer to a flexible base creates stress and leads to cracks, delamination, and failure.

You have the option, though, of using a fibre-reinforced and polymer-modified compound. The fibres act like a web of reinforcement, distributing stress across the floor, while the polymer additives offer flexibility. This means that the compound can move in harmony with the wood, removing the stress, and ensuring a tough, durable, and crack-free surface.

When to Use Self-Leveller on Wood – And When It’s Not Wise To

Even though the right type of product exists, we still need to look at the practical side. A fibre-reinforced leveller is a great solution in some circumstances – it’s not a magic fix for every floor.

It’s a great solution for:

• Levelling solid but uneven timber floorboards to create a smooth surface for carpet, LVT, or vinyl.
• Smoothing over structurally sound chipboard or plywood subfloors that have joints or minor imperfections.
• Correcting minor slopes or dips in an otherwise stable wooden floor before tiling (when used with a flexible tile adhesive).

You should avoid it if:

• The floor is bouncy – If it feels like a trampoline now, the leveller will crack. The underlying joists need strengthening first.
• There are signs of rot or damp – Covering wet or rotten wood will trap moisture and lead to bigger problems. Fix the source of the damp first.
• The floorboards are loose or unstable – The leveller needs a solid, secure base. Any movement will cause it to fail.

5 Pro-Tips for a Flawless Finish – Getting it Right First Time

The difference between a DIY job and a professional finish is all in the detail. Having installed thousands of floors over the last 20 years, we know these five steps are the way to achieve a perfect result on wood.

1. Eliminate Movement – Your first job is to create a totally stable substrate. Get down on your hands and knees and screw down any board that has even a hint of give. A few extra screws now will prevent cracks later.
2. Create a Watertight Tank – Think of your room as if it were a swimming pool. The liquid leveller will pour into any gaps it can find. To avoid this, seal the perimeter and any significant gaps between boards in order to keep the compound where you want it.
3. Don’t Skip the Primer – This is the most common mistake we see. Applying a suitable primer stops the timber from absorbing the compound’s moisture. This gives the leveller time to cure properly and gives you a much stronger bond.
4. Get the Self-Levelling Compound Mix Right – Too little water and it won’t flow; too much and it will be weak. Follow the manufacturer’s instructions to the letter, using a paddle mixer to make sure every granule is properly blended.
5. Let the Compound Do the Work – Pour the mixture evenly across the floor, starting at the furthest point from the door. Use a simple smoothing trowel or spiked roller to break the surface tension, then step back and let it find its own level.

So, What’s the Verdict?

With the right specialist compound and a structurally sound wooden subfloor, you can certainly get a beautifully level, long-lasting result. The confusion online comes from not separating the old methods from the new. Now you can confidently identify if your floor is suitable and follow a professional process.

For a professional installation that guarantees peace of mind, or to order the right products for your DIY project, speak to our experts – 020 3369 3396 or 07590 625100

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