HL Plastics
- Company typePrivate
- Founded1974
- HeadquartersDenby, United Kingdom
- Headcount251–500
- GTM typeB2B
- OfferingHardware or Manufacturing
What HL Plastics does
HL Plastics, trading as Liniar, is a UK manufacturer of PVCu (uPVC) profile extrusions for the fenestration and broader outdoor-living markets. Founded in 1974 and headquartered in Denby, Derbyshire, the company operates a single extrusion site and employs between 251 and 500 people. Liniar's product portfolio spans the core window, door, and conservatory profile systems that historically defined its business, together with a deliberate diversification into garden rooms, fencing, decking, piling, cladding, soffits and fascias, and more recently aluminium window and door systems. The company holds multiple UK-first product patents and has been recognised with a Queen's Award for Innovation; it is ISO 9001 certified and has operated a 100% operational-waste-recycling model for approximately 30 years.
Liniar is a subsidiary of Quanex Extruded Solutions, itself part of the publicly listed US building-products group Quanex Building Products, which provides the capital base for ongoing product development and capacity maintenance. The business model is a classic upstream-to-channel B2B extrusion operation: Liniar designs, extrudes, and supplies PVCu (and selectively aluminium) profile systems to a network of independent UK fabricators, manufacturers, and resellers, who in turn fabricate and install finished products for end consumers. Revenue is driven by extrusion tonnage, profile specification, and the breadth of the partner network, with no direct-to-consumer exposure and limited visibility into end-market demand.
Strategically, Liniar has signalled forward momentum through a new commercial partnership with Whiteline (May 2026), active investment in its new-build and social housing commercial team (July 2026), and the continued extension of its product range into outdoor-living and aluminium categories. The combination of channel-partner distribution, proprietary profile IP, and a long-tenured extrusion operation forms the basis of its competitive position in the UK PVC systems market.
HL Plastics firmographics
Firmographics- Name
- HL Plastics
- Legal name
- Liniar Limited
- Website
- https://hlplastics.co.uk
- Company type
- Private
- Founded year
- 1974
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Ownership category
- akta.pro rank
HL Plastics industry classification
Industry- Product category
- PVCu Fenestration and Building Products Manufacturing
- NAICS
- Plastics Pipe, Pipe Fitting, and Unlaminated Profile Shape Manufacturing (32612)
- SIC
- Miscellaneous Plastics Products (3080), Plastics Products, Nec (3089)
- akta.pro primary industry
- PVC & Chlorinated Polymers (IMAEANAB)
Keywords
Where HL Plastics is headquartered
LocationHeadquarters
- HQ city
- Denby
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
HL Plastics business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure, Marketing or Sales
Revenue model
- PVCu profile extrusion and distribution: Liniar extrudes PVCu profiles and delivers them to independent specialist manufacturers and resellers. The company also sells finished PVCu building products including windows, doors, conservatories, garden rooms, fencing, decking, and piling to various sectors.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
HL Plastics product offering
Product offeringCore offering
HL Plastics (trading as Liniar) designs, manufactures, and extrudes PVCu (uPVC) profile systems at its state-of-the-art facility in Denby, Derbyshire, and delivers them to a UK-wide network of independent specialist manufacturers and resellers. The company's product range includes PVCu window and door profiles, conservatories, garden rooms, lantern roofs, fencing, decking, piling, soffits and fascias, cladding, and complementary aluminium profile options. Finished products are used in residential, housebuilding, trade, and commercial projects across the UK.
Product overview
Liniar is a manufacturer of PVCu (unplasticised polyvinyl chloride) profile systems for the fenestration and building industries. The product portfolio includes core uPVC window and door profiles engineered from scratch with modern window technology, complemented by finished building products such as garden rooms (with Alumina bi-folds), conservatories, lantern roofs, fencing, decking, piling, soffits/fascias, and cladding. The range serves homeowners, housebuilders, trade professionals, and commercial sectors from residential to industrial projects. Liniar also offers aluminium profile options alongside PVCu.
Differentiator
Problem solved
Functional benefit
Products and services
- Windows
- Doors
- Garden Rooms
- Conservatories
- Lantern Roofs
- Fencing
- Decking
- Piling
- Soffits and Fascias
- Cladding
- Aluminium Options
Quantifiable outcome
- 100% operational waste recycled for almost three decades with zero PVCu scrap sent to landfill
Companies that use HL Plastics
Customer profileNamed customers1 record
Segments4 records
Ideal customer profiles3 records
HL Plastics technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
HL Plastics partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered core.
- WhitelinecoreLiniar and Whiteline collaborated to deliver a smarter flush sash sealing solution. This collaboration represents a product development partnership focused on improving window sealing technology.
- Quanex Extruded SolutionscoreLiniar Limited is a subsidiary of Quanex Extruded Solutions, which is itself a Quanex Building Products Company. Quanex is the parent organization providing corporate structure and ownership.
Scale indicators3 records
Recent moves4 records
Expansion highlights5 records
HL Plastics competitors and assessment
Company assessmentDirect peers
- Eurocell: UK-based manufacturer and distributor of PVCu profiles, windows, doors, and roofline products. Competes head-to-head with Liniar in the UK fenestration extrusion market and also operates a vertically integrated branch network.
- Aluplast UK: European PVCu profile manufacturer with a UK subsidiary serving the same fabricator and installer network. Directly competes with Liniar on window and door profile systems, including energy-efficient and flush-sash variants.
- Deceuninck: Belgian-headquartered global PVCu profile manufacturer with established UK operations. Directly competes with Liniar across residential window and door profile systems, supplied through fabricators and installers.
- VEKA Group: One of the largest global manufacturers of PVCu profile systems for windows and doors, with a major UK presence. Directly competes with Liniar in the same PVCu extrusion category, serving the same fabricator and installer channel.
- Kömmerling (profine UK): International PVCu profile brand with UK operations supplying window and door systems. Directly competes with Liniar in the UK fabrication channel across premium and volume residential segments.
- Profile 22: UK PVCu window and door profile system supplier owned by the Epwin Group. Directly competes with Liniar in the same fabrication channel across the UK, with comparable product positioning in residential and commercial.
- Synseal (Conservatory Outlet Group): UK manufacturer of PVCu profiles and conservatory/extension roof systems. Directly competes with Liniar in conservatory and outdoor building product ranges and shares the same installer/fabricator GTM.
- Rehau UK: German polymer specialist with a UK PVCu window and door profile systems business. Directly competes with Liniar in the UK fenestration extrusion market, with particular strength in commercial and high-end residential.
Broad incumbents
- Epwin Group: UK-listed building products group that owns Profile 22 and other PVCu profile and roofline brands. A broader incumbent in the UK fenestration and outdoor building products market, with comparable product categories to Liniar.
- Quanex Building Products: Parent company of Liniar Limited via Quanex Extruded Solutions. A US-listed broad building products manufacturer offering vinyl window and door profiles, insulating glass, and cabinet components — encompassing Liniar within a wider portfolio.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
HL Plastics social profiles
Digital presenceHL Plastics compliance and trust
Trust signalCompliance1 record
HL Plastics financial estimates
Financial estimateRevenue estimate
Valuation estimate
HL Plastics leadership team
Management profileNumber of profiles
HL Plastics funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
HL Plastics M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about HL Plastics
What does HL Plastics do?
HL Plastics (trading as Liniar) designs, manufactures, and extrudes PVCu (uPVC) profile systems at its state-of-the-art facility in Denby, Derbyshire, and delivers them to a UK-wide network of independent specialist manufacturers and resellers. The company's product range includes PVCu window and door profiles, conservatories, garden rooms, lantern roofs, fencing, decking, piling, soffits and fascias, cladding, and complementary aluminium profile options. Finished products are used in residential, housebuilding, trade, and commercial projects across the UK.
Is HL Plastics a public or private company?
HL Plastics is a private company. It is classified as corporate owned and is currently operating.
When was HL Plastics founded?
HL Plastics was founded in 1974. It employs 251 to 500 people.
Where is HL Plastics based?
HL Plastics is headquartered in Denby, United Kingdom, in the Europe region.
How does HL Plastics make money?
One revenue line is on record: PVCu profile extrusion and distribution.
Who are HL Plastics's main competitors?
Direct peers on record are Eurocell, Aluplast UK, Deceuninck, VEKA Group, Kömmerling (profine UK), Profile 22, Synseal (Conservatory Outlet Group) and Rehau UK. Broad incumbents are Epwin Group and Quanex Building Products.
Does HL Plastics have an API?
No public API is recorded for HL Plastics.
What industry is HL Plastics in?
HL Plastics's product category is PVCu Fenestration and Building Products Manufacturing. Its primary akta.pro industry code is IMAEANAB, PVC & Chlorinated Polymers. Its NAICS code is 32612 and its SIC code is 3080.