Will Polyurethane Fill Gaps In A Wood Floor?

If you’ve got a wooden floor with gaps that seem to invite every breeze, dust particle, and creepy crawlies into your home, you’re probably wondering if there’s a fix that doesn’t involve a full floor replacement! At Spray Foam Australia, we get this question a lot: Will polyurethane fill gaps in a wood floor? 

The short answer is yes—and it’s a game-changer, especially if your house is raised on stumps or has a crawl space.

Polyurethane spray foam is a versatile, expanding insulation material that’s perfect for sealing gaps, cracks, and imperfections. When applied to the gaps in your wood floor, it flows into those spaces, expands, and hardens to create a tight, durable seal. Whether it’s a tiny crack or a more noticeable gap between boards, polyurethane can fill it effectively, leaving you with a smoother, more airtight surface.

But the benefits don’t stop at just filling gaps. If your home is raised—common in many Australian properties to combat heat, moisture, or uneven terrain—those gaps in your wood floor can let in drafts that make your space feel chilly and drive up your energy bills. Polyurethane spray foam stops those drafts in their tracks. By sealing the underside of your floor or the gaps between boards, it acts as a barrier against unwanted airflow, keeping your home more comfortable year-round.

Plus, it’s not just about comfort. Sealing those gaps with polyurethane can also help keep out pests, reduce noise from creaking boards, and even improve your home’s energy efficiency. At Spray Foam Australia, we’ve seen firsthand how this simple solution can transform a draughty, raised home into a cosy, well-insulated sanctuary.

So, if you’re tired of feeling that breeze underfoot or hearing the whistle of wind through your floorboards, polyurethane spray foam might just be the answer. It’s quick to apply, long-lasting, and tailored to tackle the unique challenges of Australian homes—raised or not. Ready to say goodbye to gaps and drafts? Contact Spray Foam Australia today, and let’s get your wood floor sealed tight!