Wooden floors naturally expand and contract over time, leading to gaps between boards that can affect both appearance and performance. Changes in temperature, seasonal humidity, and years of foot traffic can cause these gaps to widen—creating draughts, trapping dust, and reducing the structural stability of your floor.
At Sanding.uk, we offer expert wood floor gap filling services in London for homes and commercial properties. Whether you are restoring an older pine floor or enhancing the insulation of a high-traffic hardwood surface, our team uses high-quality materials and precise techniques to fill gaps efficiently and cleanly.
Our approach helps eliminate cold air drafts, improves sound insulation, and enhances the overall finish of your floor. For a full restoration, gap filling is often combined with floorboard sanding and sealing, delivering smooth, long-lasting results you will see and feel immediately.
Why Choose Wood Gap Filling?
Gap filling is a critical part of wood floor maintenance—not just for appearance, but for overall performance and protection. Whether your floors are solid wood, pine, or engineered, professional gap filling helps maintain comfort, cleanliness, and long-term durability.
- Prevents draughts and improves insulation – Gaps between floorboards allow cold air to rise from below, making rooms feel colder and increasing heating costs. Gap filling helps seal these spaces, improving energy efficiency and indoor comfort—especially in older London properties.
- Enhances the appearance of your floors – Gaps can make even a well-maintained floor appear aged and uneven. Filling them creates a seamless, smooth surface that improves the visual consistency of your flooring and prepares it for optional recoating.
- Extends floor lifespan and reduces maintenance – Left untreated, gaps can lead to shifting boards, cracking, and dirt buildup. Proper filling stabilises the floorboards, reducing the risk of future damage and cutting down on repair costs.
- Protects against moisture, dust, and pests – Gaps create entry points for moisture and a home for dust, allergens, or insects. Gap filling seals off these vulnerabilities, keeping your floors cleaner, healthier, and structurally sound.
By investing in professional wood gap filling, you not only improve how your floor looks—you also strengthen how it performs and how long it lasts.
Our Wood Gap Filling Process
Our professional wood floor gap filling process is designed to deliver long-lasting, seamless results. We tailor each step based on the condition of your floors, the size of the gaps, and the type of wood. From preparation to final inspection, our team ensures a flawless finish that restores the comfort and visual appeal of your space.
Step 1: Inspection and Assessment
We begin with a detailed floor inspection to identify the size, number, and nature of the gaps. We also check for movement or underlying structural concerns to determine the most suitable gap filling method for your floor type.
Step 2: Selecting the Right Filling Method
Not all gaps require the same treatment. Based on your floor’s condition, we select one or a combination of the following professional techniques:
- Resin & sawdust mix – Ideal for fine to medium gaps, this method uses dust collected during sanding to blend perfectly with your floor’s colour and grain.
- Wood slivers – Recommended for larger gaps, these thin strips of matching timber are glued into place for a durable, natural-looking result.
- Flexible fillers – Used in areas with minor movement, these allow for subtle expansion and contraction without cracking.
Step 3: Application and Surface Finishing
Once the appropriate method is chosen, we fill each gap with care and precision. After drying, we sand the entire floor to smooth out the surface and ensure an even texture. To complete the process, we apply a protective finish—such as oil or lacquer—that seals and enhances the floor’s durability.
Step 4: Final Quality Check
Before we finish, our team performs a detailed quality inspection. We ensure that all gaps are properly filled, the floor is smooth, and the finish meets our high standards. The result is a beautifully restored wooden floor that looks flawless and performs exceptionally.
Types of Gap Filling Materials We Use
Choosing the right material is essential to ensure a durable and visually seamless result. At Sanding.uk, we select gap filling materials based on the type of wood, the width of the gaps, and the condition of your flooring. Each method is designed to preserve the integrity of your floor while improving its finish and performance.
Resin & Sawdust Mix – For Small to Medium Gaps
This method combines fine sawdust from your floor (collected during sanding) with a professional-grade resin. The result is a filler that closely matches the natural colour and grain of your existing wood. It’s ideal for filling hairline to moderate gaps, offering a smooth, discreet finish that enhances the floor’s overall appearance.
Wood Slivers – For Larger Gaps
For wider gaps, we use thin wooden strips known as slivers, cut to size from matching timber. These are glued into place, then sanded flush to create a tight, natural join that blends with surrounding boards. This method is particularly effective in restoring older or reclaimed floors where standard fillers may fall short.
Flexible Fillers – For Areas with Slight Movement
In areas where your floor experiences slight movement due to humidity or seasonal shifts, flexible gap fillers are the best choice. These high-performance compounds adapt with the wood, preventing cracks and maintaining a clean, secure appearance over time. Ideal for rooms with fluctuating temperatures or underfloor heating systems.
Why Choose Us for Wood Gap Filling in London?
We’re trusted by homeowners and businesses across London for delivering flawless, long-lasting wood floor gap filling solutions. Whether you’re restoring a period home or maintaining high-traffic commercial flooring, our attention to detail, materials, and customer care sets us apart.
- Experienced & skilled flooring specialists – Our team brings years of experience in restoring all types of wooden floors, including pine, hardwood, and engineered boards. We apply tailored techniques that ensure consistent, smooth results across every project.
- High-quality materials & advanced methods – From resin and sawdust to wood slivers and flexible fillers, we use only premium-grade materials suited to your floor’s movement, gap width, and wood type.
- Competitive pricing & clear quotes – We offer fair, transparent pricing with no hidden costs. Our quotes are detailed and upfront, ensuring you receive excellent value from the start.
- Customer satisfaction guaranteed – Our process is built around clear communication, respect for your space, and professional results. From consultation to completion, we make the entire experience smooth, efficient, and rewarding.
If you are looking for expert wood gap filling in London that restores warmth, beauty, and functionality to your floors, we are ready to help.
Contact Us for a Free Gap Filling Quote
Ready to restore your wooden floors with professional wood gap filling? Our expert team is here to help with tailored advice and seamless results. Whether you are dealing with draughty gaps, dust buildup, or movement in your boards, we’ll assess your needs and recommend the best solution for long-lasting beauty and comfort.
Call us today on 020 88309782, book your free site visit, or reach out via our contact form. Combine this service with wood floor recoating for a fully refreshed finish.
Frequently Asked Questions About Wood Gap Filling
Is gap filling necessary for all wood floors?
Not always. Some small gaps are natural and harmless, especially in older floors. However, larger or persistent gaps can lead to draughts, dirt build-up, and instability. Our team can assess your floor and recommend whether gap filling is needed.
Which method is best—resin or wood slivers?
It depends on the gap size and your floor type. Resin and sawdust are ideal for fine to medium gaps, while wood slivers are used for wider spaces. We’ll recommend the right solution after inspection.
Will the filler match my existing wood?
Yes. Resin is mixed with dust from your floor during sanding, providing a near-perfect colour match. Wood slivers are cut from similar timber to ensure consistency in grain and tone after finishing.
Does gap filling help with insulation?
Absolutely. Filling gaps reduces cold air draughts, especially in ground floor rooms, improving energy efficiency and comfort—particularly during the winter months.
Can gap filling be done without sanding?
Technically yes, but sanding is highly recommended. It smooths the filled areas and ensures a consistent surface. Most clients choose to pair gap filling with floorboard sanding for the best finish.