# Wood floor installers

> Start with a recognised certification or trade body, then check what the installer measures before laying: subfloor moisture, flatness, conditions on site and expansion space. A written quote should name each of those steps.

Source page: https://www.misterendgrain.com/installers/
Updated: 2026-11-03

A good wood floor installer is someone who can show relevant training, tests the building before laying and puts those steps in writing. Certification schemes exist in several countries, but none replaces checking the work and references for yourself. This guide explains what to look for and what to ask. For definitions, see our [glossary](https://www.misterendgrain.com/glossary/).

## Which certifications and trade bodies exist?

**United States.** The National Wood Flooring Association (NWFA) runs a Certified Professional program. Its certifications are Certified Sales Advisor, Certified Installer, Certified Sand & Finisher, Certified Wood Flooring Inspector, Certified Craftsman and Certified Master Craftsman, and candidates must pass online and hands-on testing. The NWFA also provides a "Find a Professional" search and a route for filing a complaint [1].

**United Kingdom.** The BWFA, which presents itself as the trade association solely representing the UK wood flooring industry, lists installers in a "Find a Member" search [2]. Its installer page says membership is granted to individuals and companies on successful application demonstrating competence [3]. Members work to a published code of conduct covering honesty with customers and compliance with regulations [5]. Training is delivered by FloorSkills, the approved BWFA training provider, up to NVQ level [4].

**Europe.** FEP, the European Parquet Federation, describes itself as the main body representing and defending the interests of the European parquet industry [6]. The pages we reviewed describe standards, legislation and market work rather than a register of fitters, so use your national federation or a local qualification instead.

**France.** QUALIBAT is a certification and qualification body for building trades, and says a qualification confirms a company's professional skills [7]. Its 2026 nomenclature has a parquet speciality (434) covering substrate preparation, restoration and finishing, with three levels: 4341 for glued and floating parquet, 4342 for large-area parquet such as public buildings and sports halls, and 4343 for traditional parquet, including end-grain block floors [8]. QUALIBAT also offers a directory to find a qualified company [7].

## What should you ask before you hire?

- Which certification or membership do you hold, and can I verify it in the public directory?
- Which flooring types and patterns have you laid recently, and can I see or contact those projects?
- How will you test the subfloor, and what readings will you give me?
- What conditions must the building meet before delivery?
- Who is responsible for the floor if the building's humidity falls outside the manufacturer's range?

## What should a quote include?

**Subfloor assessment and moisture tests.** The NWFA says wood subfloors must be flat, clean, dry, structurally sound, free of squeaks and free of protruding fasteners, and sets tolerances on moisture content difference between flooring and subfloor of no more than 4% for solid strip flooring under 3 in. wide and 2% for wider solid planks [9]. The NWFA's Moisture and Wood publication lists calcium chloride and relative humidity probe tests as methods for concrete [10]. The BWFA's training lists reading moisture in concrete and wooden subfloors and applying surface damp-proof membranes among its subfloor modules [4].

**Flatness work.** Flatness limits depend on the fixing method [9], and for herringbone the NWFA says flatness is especially critical, typically within ⅛ in. over 10 feet [12]. Ask whether levelling is priced separately.

**Acclimatisation and site conditions.** The NWFA says the building should be enclosed with wet work complete, and held at expected living conditions of temperature and humidity for at least five days before installation. For solid wood it advises moisture readings on a minimum of 40 boards per 1,000 sq ft of flooring [10]. Our [guide to moisture and acclimatisation](https://www.misterendgrain.com/guides/moisture-and-acclimatisation/) explains why.

**Expansion gaps.** The NWFA guidelines specify minimum perimeter expansion space by flooring type, and refer engineered flooring to the manufacturer's recommendation [11]. Ask the installer to state the gap and how it will be covered.

**Method and finish.** The quote should name the installation method, such as glue-down or floating (see [installation methods](https://www.misterendgrain.com/guides/installation-methods/)), and the finish system, oiled or lacquered (see [wood floor finishes](https://www.misterendgrain.com/guides/wood-floor-finishes/)). If you expect to sand later, see [sanding and refinishing](https://www.misterendgrain.com/guides/sanding-and-refinishing/).

## Installer listings by city

- [London](https://www.misterendgrain.com/installers/london/): verified flooring fitters and restoration specialists across Greater London, plus BS 8201:2011 code of practice and period joist guidance.
- [Paris](https://www.misterendgrain.com/installers/paris/): verified parqueteurs across the capital, plus local NF DTU 51.1 and 51.2 rules for Haussmannian and modern apartments.

Listings for other major cities are being added to this section. Businesses that would like to be considered for a listing can request one through our [contact page](https://www.misterendgrain.com/contact/).

## Sources

1. [NWFA Certified Professional program](https://nwfa.org/cp-about/), National Wood Flooring Association, accessed 2026-11-03
2. [The BwfA: Wood Flooring Association](https://www.bwfa.co.uk/), BWFA, accessed 2026-11-03
3. [BwfA installers](https://www.bwfa.co.uk/installers), BWFA, accessed 2026-11-03
4. [Technical training](https://www.bwfa.co.uk/technical_training), BWFA, accessed 2026-11-03
5. [Standards of Professional Conduct](https://www.bwfa.co.uk/conduct), BWFA, accessed 2026-11-03
6. [About FEP](https://www.parquet.net/p/about-us.html), FEP, the European Parquet Federation, accessed 2026-11-03
7. [QUALIBAT home page](https://www.qualibat.com/), QUALIBAT, accessed 2026-11-03
8. [Nomenclature 2026, version 1: qualifications et certifications](https://www.qualibat.com/pdf/get-nomenclature-full), QUALIBAT, accessed 2026-11-03
9. [NWFA Guide 3: Subfloor Guidelines (revised 02.2016)](https://cdn.shopify.com/s/files/1/2953/2504/files/NWFA_GUIDE_3_-_Subfloor_Guidelines.pdf), National Wood Flooring Association, accessed 2026-11-03
10. [Moisture and Wood, Technical Publication No. A100 (2017)](https://cdn.shopify.com/s/files/1/2953/2504/files/Moisture_and_Wood.pdf), National Wood Flooring Association, accessed 2026-11-03
11. [NWFA Guide 4: Installation Guidelines (revised 02.2016)](https://cdn.shopify.com/s/files/1/2953/2504/files/NWFA_Guide_4_-_Installation_Guidelines.pdf), National Wood Flooring Association, accessed 2026-11-03
12. [Ornamental Floors: Design and Installation, Technical Publication No. B300 (2015)](https://cdn.shopify.com/s/files/1/2953/2504/files/Ornamental_Floors.pdf), National Wood Flooring Association, accessed 2026-11-03