NDI

What NDI does

NDI is a UK-based construction materials distributor headquartered in Maidstone, Kent, specialising in drywall, insulation, partitions, renders and ceiling materials. The company operates seven physical branch locations across England and Wales — Birmingham, London (Sutton), Maidstone, Milton Keynes, Newport (South Wales), Newton-Le-Willows and Poole — serving self-builders, trade professionals and contractors. NDI positions itself as one of the largest Siniat stockists in the UK and stocks products from more than 30 manufacturers including British Gypsum, Knauf, Rockwool, Kingspan, Celotex, Rockfon, CEMEX, Isover, and Superglass.

The business model is traditional specialty distribution: NDI aggregates products from multiple manufacturers, holds inventory at branch level, and fulfils orders via a modern delivery fleet that includes mechanical offload at no extra charge. Revenue is generated through transactional sales of construction materials, supported by a trade account programme that offers tailored pricing and trading terms to professional buyers. Its value proposition rests on product breadth, in-stock availability, technical advisory from experienced sales staff, and delivery capability — rather than any proprietary technology platform. The product portfolio spans commodity insulation and plasterboard through to proprietary Truline partition systems (System 2000/3000/4000/9000/9000FR), XP window/door frames, acoustic glass doors, timber doors, and Centurion Interiors partitioning.

NDI is a wholly-owned trading division of Huws Gray Group, a diversified UK building materials conglomerate (company number 2506633) that also encompasses Buildbase, Hirebase, Electricbase, Qualplas, The Timber Group and other brands. As a sub-scale specialist within a larger group, NDI benefits from group-level procurement, shared supply chain infrastructure and cross-entity relationships, while maintaining a focused dry-lining and ceiling-systems proposition. All operations are domestic within the United Kingdom.

Name

NDI

Legal name

NDI

Website

https://ndi.co.uk

Company type

Private

Operating status

Operating

Headcount range

51–100 employees

Short description

NDI is a UK-based construction materials distributor operating seven branches across England and Wales, supplying drywall, insulation, partitions, renders and ceiling materials to self-builders, trade professionals and contractors as a division of Huws Gray Group.

Ownership category

akta.pro rank

Headquarters

HQ city

Maidstone

HQ country

United Kingdom

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Construction Materials Distribution: NDI generates revenue through the sale of construction materials including drywall, insulation, partitions, renders, and ceiling materials. They act as a distributor/stockist offering products from multiple manufacturers to the construction industry, with pricing and trading terms available to suit different business types.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

NDI distributes drywall, insulation, partition systems, renders, and suspended ceiling materials to the UK construction industry. The company stocks products from market-leading manufacturers (including Siniat, British Gypsum, Knauf, Rockwool, Kingspan, Celotex, Rockfon, and others) and serves both trade professionals and self-builders through seven UK branch locations, a delivery fleet with mechanical offload, and trade account programs.

Product overview

NDI is a construction materials distributor specializing in drywall, insulation, partitions, renders, and ceiling materials for the UK construction industry. The company operates as a single unified distribution offering with multiple product categories: Insulation (roofing, cladding, acoustic), Drywall (Siniat and British Gypsum products), Renders (scratch and thin-coat systems), Suspended Ceilings, and Partition Systems. The partition systems portfolio includes the Truline brand product lines (System 2000, System 3000, System 4000, System 9000, System 9000 FR) plus XP windows and door frames, alongside Centurion Interiors partitions, acoustic glass doors, and timber doors. NDI is part of the Huws Gray Group and stocks products from market-leading manufacturers including CEMEX, Rockwool, British Gypsum, Actis, Celotex, Kingspan, Knauf, and Isover.

Differentiator

Problem solved

Functional benefit

Products and services

• Insulation Products A wide range of insulation products for roofing, cladding, acoustic insulation, loft, inverted roof, and rainscreen insulation applications, stocked from manufacturers including Knauf, Rockwool, Kingspan, Celotex, Isover, Superglass, Xtratherm, Actis, Jablite, Cellecta, and Thermal. Targeted at trade professionals and self-builders across the UK construction industry.
• Drywall Products Drywall products and solutions including systems from Siniat (NDI is one of the largest stockists of Siniat products in the UK) and British Gypsum. Targeted at trade professionals and self-builders requiring drywall for UK construction projects.
• Render Products Extensive portfolio of render products and accessories including scratch render and thin-coat systems with a wide variety of colours available from stock. Supported by experienced sales teams offering expert advice for render enquiries. Targeted at trade professionals and self-builders.
• Suspended Ceiling Products Suspended ceiling products and systems including ceiling systems and accessories, with technical advice available on installation and performance. Stocked from manufacturers including Rockfon, SAS, and others. Targeted at trade professionals working on UK construction projects.
• Partition Systems (Truline range) Partitioning solutions including the Truline brand product lines: System 2000, System 3000, System 4000, System 9000 (single and double glazed), and System 9000FR (fire-rated 30/0 variants including FR-DG double glazed and FR-SG single glazed). Also features Centurion Interiors partitions, fully glazed partitions, fire doors, ironmongery, bespoke colours and design. Targeted at commercial and residential partitioning applications for trade professionals and self-builders.

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Eight partnerships are on record, tiered core, major and flagship.

• KnaufcoreChannel Partner/ Reseller/ DistributorKnauf is one of the major manufacturers whose products NDI distributes, including Knauf insulation products. NDI offers Knauf products as part of their extensive range of construction materials from market-leading manufacturers.
• British GypsumcoreChannel Partner/ Reseller/ DistributorBritish Gypsum is a key manufacturer partner for NDI's drywall products and solutions. NDI offers British Gypsum systems alongside Siniat products for drywall applications.
• SiniatcoreChannel Partner/ Reseller/ DistributorNDI is one of the largest stockists of Siniat products in the UK, specialising in drywall products and solutions. This is a key partnership that positions NDI as a supplier of choice for drywall needs.
• RockwoolmajorChannel Partner/ Reseller/ DistributorRockwool is one of the manufacturers whose insulation products NDI stocks and distributes, providing insulation solutions for various construction applications.
• KingspanmajorChannel Partner/ Reseller/ DistributorKingspan is a manufacturer partner for NDI, supplying insulation products that NDI distributes to the UK construction industry.
• CelotexmajorChannel Partner/ Reseller/ DistributorCelotex is a manufacturer whose insulation products NDI stocks and supplies to the construction industry.
• RockfonmajorChannel Partner/ Reseller/ DistributorRockfon is a manufacturer partner for NDI's suspended ceiling products, providing ceiling solutions available from NDI's stock.
• Huws Gray GroupflagshipStrategic or Co-development PartnerNDI is part of the Huws Gray Group, a larger building materials group encompassing multiple businesses including Buildbase, Hirebase, @Home, Electricbase, Tool Centre, and others. Huws Gray is the parent company and data controller for NDI.

Scale indicators1 record

Recent moves5 records

Expansion highlights5 records

Direct peers

• Jewson: National UK builders' merchant distributing drywall, insulation, and ceilings with a strong trade account programme. Comparable to NDI on core product categories and trade-focused GTM motion.
• Buildbase: UK builders' merchant within Huws Gray Group distributing construction materials including insulation and drywall. Sister business to NDI with overlapping product range and trade customer base.
• Selco Builders Warehouse: Trade-only builders' merchant with 70+ UK branches stocking drywall, insulation, and ceiling products. Comparable to NDI on trade-focused GTM and product categories, with larger scale.
• Saint-Gobain Distribution: UK arm of Saint-Gobain distributing drywall, insulation, and ceiling products through brands such as Gibbs & Dandy and Graham. Directly overlaps NDI's core product range and trade customer base, with national branch coverage.
• Encon Insulation: UK specialist insulation and drylining distributor supplying contractors and merchants. Comparable to NDI on insulation and drywall categories, though with a more specialist tilt.
• SIG Distribution: UK specialist distributor of insulation, drywall, and ceiling products with a national branch network. Directly competes with NDI in the same product categories and trade customer segment.
• Travis Perkins: UK's largest builders' merchant with 1,000+ branches distributing drywall, insulation, ceilings, and general construction materials to trade and DIY. Overlaps NDI on product categories and serves a similar trade customer profile.
• CCF (Construction Commerce Forum): Specialist distributor of interior building products including drywall, ceilings, and insulation across the UK. Closely matches NDI's category mix and trade-led distribution model.

Broad incumbents

• Wickes: UK home improvement retailer selling drywall, insulation, and ceilings alongside a broader DIY and trade range. Overlaps with NDI on product categories but skews more toward retail/DIY than trade specialists.

Others

• Huws Gray: Parent group of NDI and a diversified UK construction materials conglomerate. Provides group-level capital, supply chain, and strategic direction that directly shapes NDI's competitive position.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/ndi---nationwide-drywall-and-insulation
• Xx.com/hellothere_ndi

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about NDI