Palladio vs Solidor Composite Doors: Which is Better in 2026?

Palladio and Solidor are the two most widely specified composite door brands in the UK premium market. Both have 48mm solid timber cores, both carry Secured by Design accreditation, and both quote 12-year manufacturer warranties. On paper they look identical. In practice there are meaningful differences — in construction, colour longevity, warranty coverage and installer support — that push different homeowners toward one or the other.

This guide walks through both brands head-to-head and explains which is the right choice for different property types and priorities.

Quick Summary

• Palladio — Irish-made, monocoque fibreglass construction (a single moulded shell with no joins), strongest position on colour longevity, more limited design range but tighter quality control. Vitrum Solutions installs Palladio exclusively.

• Solidor — Stoke-manufactured, traditional composite construction (GRP skin bonded to timber frame), widest design range in the UK market, broader dealer network, historically some colour-fade issues on specific shades.

Both are premium products at the £1,500 – £3,000 installed range. Cheaper composite doors (Rockdoor, Hurst, Endurance at lower trim levels) compete below this.

Construction Differences

Palladio: Monocoque Fibreglass

Palladio doors are built as a single moulded fibreglass slab around a 48mm solid timber core. Think of it like a one-piece car door panel — no weak points, no joins where moisture can ingress, no separate skins bonded to a frame.

Key construction features: - 48mm solid timber core (the thickest in the UK composite market) - Full fibreglass wrap — both faces and all four edges in one continuous shell - Triple-glazed glass units as standard - U-value: 1.0 W/m²K (among the best-insulated composite doors available) - Irish manufacture with tight QA process

Solidor: Bonded GRP Skin

Solidor uses a traditional composite door construction: - 48mm solid timber core - Glass-reinforced polymer (GRP) outer skins bonded to the timber core on front and back - Separate edge strips around the perimeter - Triple or double glazing options - U-value: 1.2 W/m²K - Stoke-on-Trent manufacture with established production scale

The difference matters because bonded skins can (in rare cases) delaminate at the edges over 20+ year lifespans, particularly in wet exposed positions. Palladio's monocoque construction eliminates this failure mode entirely.

On construction, Palladio has the edge for long-term durability — but both are well-engineered premium products.

Security Comparison

Both doors are Secured by Design accredited and PAS 24:2022 certified. Standard specifications are very similar:

Palladio

• 3-star TS007 cylinder (anti-snap, anti-drill, anti-bump)
• Multi-point hook-bolt locking (5 points)
• Laminated inner glass pane
• Reinforced hinge jamb
• Integrated peephole and security chain optional
• PAS 24:2022 certified

Solidor

• 3-star TS007 cylinder (anti-snap, anti-drill, anti-bump)
• Multi-point hook-bolt locking (5 points, Yale lock standard)
• Laminated inner glass pane
• Reinforced hinge side
• Integrated smart lock options (Yale Keyless Connected) available
• PAS 24:2022 certified
• Optional fire rating (FD30)

Security: broadly equivalent. Solidor has a slight edge on smart-lock integration and fire-rated options. Palladio is marginally more secure at the edges due to monocoque construction.

Colour and Finish

This is where the two brands diverge most visibly.

Palladio colours

Palladio offers 18 standard colours plus limited custom options. The range covers: - Classic whites and creams - Anthracite greys (RAL 7016, 7040) - Black (RAL 9005) - Heritage greens (hunter green, racing green) - Heritage blues (Oxford blue, navy) - Rosewood and oak woodgrain foils - Chartwell green (on request)

Colour longevity: Palladio's fibreglass outer surface is UV-stable and has shown minimal fade over 10+ year installations in UK conditions. The manufacturer guarantees the colour for 12 years.

Solidor colours

Solidor offers 24+ colours — the broadest range in the market — including: - All major greys (French grey, Schiefer, anthracite, Agate grey) - Black, jet black, traditional black - Reds (chili red, ruby, traditional red) - Greens (hunter, Cotswold, chartwell) - Blues (Duck egg, Oxford, Peacock) - Purples (heather, deep purple) - 30+ RAL colour options on request

Colour longevity: Solidor's GRP skin carries a 10-year colour guarantee. Historically, deep reds and some purples have shown visible fade after 6-8 years in south-facing installations — Solidor's current production has addressed this with improved pigment stability, but the legacy issue is worth knowing about if you are buying a Solidor door in a vibrant colour for a west or south-facing aspect.

On colour: Solidor wins on range, Palladio wins on longevity. If you want a bold or unusual colour, Solidor has more options. If you want guaranteed fade-free performance, Palladio is the safer choice.

Warranty Coverage

Palladio

• 12-year manufacturer warranty covering:

• Installer warranty typically adds 10-year workmanship cover
• 10-year CPA insurance-backed guarantee (via Vitrum Solutions)

Solidor

• 10-year manufacturer warranty covering:
• Glass unit covered for 10 years separately
• Installer warranty adds workmanship cover
• Most Solidor installers offer insurance-backed guarantees separately

On warranty: Palladio's 12-year coverage is longer and slightly more comprehensive than Solidor's 10-year. In practice, both manufacturers honour claims professionally.

Design Range

Palladio design options

• Traditional panel designs: 24 main styles including stepped, raised-moulding, 4-panel, 6-panel
• Contemporary flat designs: 8 minimal-line options
• Glazed options: side panels, fanlights, sidelights in matching or contrasting styles
• Hardware: 8 handle colours (including rose gold, brushed nickel, black, chrome)
• Glass choices: 20+ patterns from clear to obscure

Solidor design options

• Traditional and contemporary: 30+ main designs
• Most design flexibility in the UK market
• Glazed options: full range of sidelights, fanlights, French door pairs
• Hardware: 12+ handle finishes including copper, antique brass, chrome, black
• Glass choices: 40+ patterns

On design: Solidor has roughly 50% more options. If you have a very specific design in mind — particularly a heritage or traditional pattern — Solidor is more likely to have the exact match off the shelf.

Price Comparison (2026, fully installed)

Typical pricing for a standard front door, 900mm x 2100mm, no sidelights, in a standard colour, fully installed by a FENSA-registered installer with a 10-year insurance-backed guarantee:

Palladio

• Classic traditional panel door: £1,800 – £2,200
• Contemporary flat-panel design: £2,000 – £2,400
• Door plus single sidelight: £2,500 – £3,000
• Door plus two sidelights: £2,800 – £3,500

Solidor

• Classic traditional panel door: £1,700 – £2,100
• Contemporary flat-panel design: £1,900 – £2,300
• Door plus single sidelight: £2,400 – £2,900
• Door plus two sidelights: £2,700 – £3,300

Price: Solidor typically £100 – £200 cheaper than Palladio at equivalent specifications, reflecting the larger production volume and established dealer network.

Installation Considerations

Both doors install on similar schedules (4-6 hours for a single door swap). Slight differences:

• Palladio: ships as a complete pre-hung unit. Installers must be Palladio-approved. Vitrum Solutions is a Palladio approved installer.
• Solidor: also ships pre-hung. Dealer network is much broader — any competent composite door installer can fit a Solidor.

For both, FENSA registration is essential for the certificate. Both are typically delivered 4-6 weeks from order.

Which Should You Choose?

Choose Palladio if:

• You want the longest-lasting composite door on the market
• You live in a coastal or exposed location where colour fade is a concern
• You are buying a heritage colour (traditional black, Cotswold, heritage green, rosewood) and want guaranteed 12-year colour stability
• You want the strongest warranty available
• You are in the Vitrum Solutions service area (Buckinghamshire, Berkshire, Oxfordshire, Surrey, Hampshire, Hertfordshire, West London) — we install Palladio exclusively

Choose Solidor if:

• You want a specific design or colour not offered by Palladio
• You want a smart-lock integration (Yale Keyless Connected)
• You need a fire-rated entrance door (FD30)
• You are working with a local installer who only offers Solidor

Why Vitrum Solutions Fits Palladio Exclusively

We made the decision to fit Palladio exclusively across our composite door range because, across 200+ installations, Palladio has shown:

• Zero delamination issues over 10+ year service life
• Minimal colour fade even on south-facing installations
• Consistent manufacturing quality (low QA rejection rate at survey)
• Fewer hardware failures in year 5-10 (critical warranty window)
• Irish manufacture — shorter supply chain than some competitors

This is based on our field experience, not a commercial relationship. Solidor remains a strong product and homeowners in other service areas will find competent Solidor installers easily. For our coverage area and with our QA standards, Palladio is the product we stand behind.

Frequently Asked Questions

Can I see both doors before choosing?

Both manufacturers have display samples available through dealers. Contact Vitrum Solutions for a Palladio showroom appointment or use Solidor's Find a Dealer service on their website for local Solidor samples.

What about Rockdoor?

Rockdoor is a separate composite door brand at a slightly lower price point (£1,200 – £1,800 installed). Construction is different: GRP skin over a timber core with polymer edge strips. Quality is reasonable but warranties are shorter (8 years typical) and colour longevity is more variable. Rockdoor sits below Palladio and Solidor in the premium stack.

How long before I see an issue with either brand?

Realistic expectations for both brands at 48mm core specification: - Years 1-5: essentially maintenance-free - Years 5-10: occasional hinge adjustment, possibly one seal replacement - Years 10-15: likely cylinder/lock replacement - Years 15-25: possibly a frame reseal, hinges may need replacement - Years 25-30: typical end-of-life for budget composite doors; premium doors (Palladio, Solidor) can reach 30+ years

What's the U-value difference really worth?

Palladio's 1.0 W/m²K vs Solidor's 1.2 W/m²K is a ~17% heat loss difference on the door itself. In practice, this is £5-£10 per year on heating costs for an average UK home — meaningful over 30 years but not a decisive factor.

Getting a Quote

Vitrum Solutions installs Palladio composite doors across Buckinghamshire, Berkshire, Oxfordshire, Surrey, Hampshire, Hertfordshire and West London. Request a quote and we'll provide a written itemised price for your preferred style, colour and glazing configuration.

For more detail on Palladio specifically, see our Palladio Review and Best Composite Doors UK guides.