Subfloor Preparation Services in London

Subfloor Preparation

Levelling, repairs and screeding to get your subfloor ready, carried out across London. Free survey and fixed quote.

EXCELLENT 4.9 · 38 reviews Google

15+ Years Experience

Established London flooring contractor

276+ Projects Completed

Across residential & commercial

5-Star Rated

Google & Checkatrade reviews

Fully Insured

Public liability covered

Subfloor Preparation

For Best Long Term Results

Subfloor preparation is the most important step before installing your floor. We create a smooth and dry base so your new flooring lasts longer.

At ROI Flooring, we serve homes and businesses across London with expert subfloor services.

Bad subfloors cause cracked tiles, squeaky boards, and poor results. Our team uses tools like self leveling compound, DPM sealers, and plywood boards to fix that.

We prepare your surface the right way before any floor goes in.

What We Include

- DPM sealing to block moisture
- Self leveling concrete over concrete
- Plywood and chipboard overlays
- Soundproof mats for busy areas
- Hardwood floor subfloor prep
- Karndean subfloor preparation
- LVP subfloor prep
- Preparing subfloor for laminate flooring

Floor Types We Support

We adjust based on your flooring.

Preparing subfloor for laminate flooring means flat, dry, and clean surfaces.
LVP subfloor prep must be smooth so planks stay in place.
Karndean subfloor preparation needs high detail and approved layers.

Whether it’s concrete subfloor prep or wood, we match the right method to your space.

You’ll get a clean, ready surface — no guesswork.

DIY vs Professional Subfloor Preparation?

DIY Subfloor Prep

Professional Prep (ROI Flooring)

Our Subfloor Preparation Procedure

Step 1: Subfloor Assessment
We inspect your subfloor for cracks, dips, moisture, or uneven surfaces before starting. This ensures the correct subfloor preparation method is used.
Step 2: Moisture Testing & DPM Application
If required, we apply a damp-proof membrane (DPM) to protect your new flooring from moisture. This is critical in concrete subfloor prep.
Step 3: Surface Leveling
We apply high-quality self leveling compound over concrete or wooden bases to eliminate bumps and low spots.
Step 4: Overlay with Plywood or Chipboards
For wood floors or floating installations, we install plywood sheets or acoustic chipboards to create a stable base.
Step 5: Soundproofing (Optional)
For flats or upper floors, we can add acoustic underlay or soundproof mats as part of the subfloor prep.
Step 6: Final Prep for Floor Type
We finalize the surface depending on your flooring choice — whether it’s LVP, laminate, Karndean, or engineered wood.

Fully Insured. Guaranteed Work.

Every flooring project is covered by our public liability insurance. We offer full guarantees on materials and workmanship. Clients trust ROI Flooring because we don’t just deliver quality — we stand behind it.

Testimonials

Trusted Across London

      EXCELLENT  
   Based on 38 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Amanda 
 
 
 
 Trustindex verifies that the original source of the review is Google. I have had so many trades people in my house over the past of renovating. These guys are heads and shoulders above all the other. From helping my elderly dad, offering to transport things in there van. All that aside, the standard of work is exceptional, they are timely and tidy. Even my dad was impressed, they arrive they work, they finish and you pay. Absolutely delightful
  
 
      Posted on Google  
   
   Kathalina Taylor 
 
 
 
 Trustindex verifies that the original source of the review is Google. Today was in dire straits as my grandson accodemtly got locked out of his bedroom and could not get it open
Thankfully asked this young gentleman for his help and with the aid of his colleague got the door open
Mine you theywere not meant to be working today.
I am so ever grateful
  
 
      Posted on Google  
   
   sandeep kaur 
 
 
 
 Trustindex verifies that the original source of the review is Google. Really glad I went with Granit and his team to do quite a complex floating floor and staircase installation. They did a beautiful job and they were really easy to work with. They really helped take the stress out of the renovation by being solution oriented at all times. I’d recommend them to anyone!
  
 
      Posted on Google  
   
   Andy Margesson 
 
 
 
 Trustindex verifies that the original source of the review is Google. I’m really impressed with the work done on our new floors. They handled four rooms and the hallway seamlessly. What stood out most was the team's efficiency and courtesy; they were helpful at every turn and worked with impressive speed amd professionalism. The flooring look stunnin and we are thrilled with the transformation
  
 
      Posted on Google  
   
   Alex Dyer 
 
 
 
 Trustindex verifies that the original source of the review is Google. Unbelievable service and quality of finish. The guys finished the job quickly, professionally and exactly how I wanted. I needed a few extra things done and the guys done it without hesitation. Will always be the first people I go to for flooring thank you so much!
  
 
      Posted on Google  
   
   Carol 
 
 
 
 Trustindex verifies that the original source of the review is Google. I am very happy with the work completed. Granit and his team was helpful in finding me suitable wood flooring for my bedrooms and worked quickly to complete the job
This is the second time that I have contacted the company to complete work in my house and love their polite and professional approach and attention to detail.
I would recommend them to others
  
 
      Posted on Google  
   
   Fane Mensah 
 
 
 
 Trustindex verifies that the original source of the review is Google. Super happy with our new floors, great experience, very quick turnaround, great and very efficient team. The end result is amazing! Would definitely recommend.
  
 
      Posted on Google  
   
   Elio Zuk 
 
 
 
 Trustindex verifies that the original source of the review is Google. We went with ROI as it was a local business and were really happy with the results. We booked tony to match a few holes in our floor and it's turned out seamless.
  
 
      Posted on Google  
   
   Ferhat Turjaka 
 
 
 
 Trustindex verifies that the original source of the review is Google. I am very impressed
Excellent work .
Granit was very professional helping me with all information , and his team did excellent work .l am very impressed with the service and work. I will definitely recommend Roi Flooring.
  
 
      Posted on Google  
   
   Sivan Einstein 
 
 
 
 Trustindex verifies that the original source of the review is Google. Professional and trust worthy! Superb service!

Free Subfloor Check

Your new floor needs a solid base.
We’ll check your subfloor for free and tell you what’s needed.
Our subfloor preparation services are fast, clean, and done right.