Stronghold Solid Core Composite Doors – Glasgow’s Strongest & Most Stylish Entrance Doors

Looking for the best composite doors in Glasgow?

At Williams Windows & Doors, we proudly supply and install the Stronghold Solid Core Composite Door — one of the UK’s most secure, stylish, and durable entrance doors on the market.

Whether you’re upgrading your home’s kerb appeal or boosting security, our Stronghold range is engineered for life in Scotland — combining cutting-edge lock technology, beautiful design, and rugged performance that stands up to the infamous Glasgow climate.

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🔒 Maximum Security with a Solid Timber Core

At the heart of every Stronghold Solid Core Door is a high-density solid timber core, available in 50mm and 44mm thicknesses. Unlike foam-filled alternatives, this delivers unbeatable strength, impact resistance and thermal stability.

Each door features:

 

• BSI Kitemark accreditation

• TS007 3-star and SS312 Diamond grade locking

• Secured by Design (Police approved)

• Anti-drill, anti-pick, anti-bump, anti-snap Euro cylinders as standard

This is not just a composite door — it’s a fortress in your front frame.

“Homeowners in Glasgow want peace of mind,” says Fraser Sinclair, CEO of Williams Windows & Doors. “With Stronghold doors, you’re not just choosing style — you’re investing in serious security, backed by a 5 year guarantee.”

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🎨 Classic Style Meets Modern Design

With over 20 unique door styles, from traditional to contemporary, and an unrivalled range of decorative glazing options, there’s a Stronghold design for every home.

Available in a variety of finishes:

• Woodgrains like Oak, Irish Oak, and Rosewood

• Popular colours including Anthracite Grey, Chartwell Green, Red, Blue, and Black

• Custom RAL, BS or Farrow & Ball colours via our expert paint service – your door can be literally any colour you like. The outside and inside of the door can be different colours.

Every door features a textured outer skin for timber realism and a smooth white interior skin for a bright, clean look inside (although this can be changed, if preferred).

Pair your door with chrome, black, graphite, white, champagne gold or stainless steel hardware — including bar handles up to 1500mm for a modern entrance feel.

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🪟 Stunning Glazing & Designer Touches

Stronghold doors are designed to stand out. Choose from 32mm

 triple-glazed units (on 50mm doors) and over 30 decorative glass patterns including:

• Murano, Zinc Prairie, Reflections, Simplicity, Aurora, New Orleans, and Fusion Ellipse

• Optional Fusion tiles in rich colours for a hand-crafted touch

• Contemporary etched or sandblasted glass for privacy without sacrificing style

These doors aren’t just secure — they’re a statement piece.

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🛠️ Built for Glasgow. Built to Last.

From rain and wind to freezing temperatures, Glasgow weather can be harsh. That’s why the Stronghold Solid Core Door is designed with performance in mind:

• Thermal efficiency: solid timber cores, quality seals and triple glazing keep the cold out

• Low maintenance skins: no warping, no flaking, no fading

• 10-year mechanical guarantee on all moving parts

And thanks to ProGlide nickel silver keys, you get smooth, long-life lock performance — no more struggling with stiff keys or jamming locks.

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🚪 A Door for Every Home

 

Whether you live in a sandstone terrace, a modern build, or a suburban semi, Williams Windows can supply and fit the perfect Stronghold door for you. Popular models include:

• Belsay – ideal for adding a modern look to traditional Glasgow homes

• Windsor & Alnwick – for elegant kerb appeal

• Durham & Etal – minimal, modern styles with bold impact

• Bowes, Dover & Carlisle – flexible designs with strong symmetry

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🧠 Why Choose Williams Windows?

✔ Local experts with decades of installation experience
✔ Factory in Clydebank – supporting Scottish manufacturing
✔ Fast turnaround and professional fitting
✔ Excellent customer reviews and aftercare
✔ Trade and public welcome

“We’re not just selling doors — we’re helping customers feel secure, proud of their homes, and confident in their investment,” says Fraser Sinclair.

 

 

📍 Composite Doors in Glasgow

 – Get a Free Quote Today

We install Stronghold Solid Core Composite Doors across Glasgow, West Dunbartonshire, Renfrewshire, East Dunbartonshire, and beyond.

📞 Call us today to speak with our expert team
📍 Visit our showroom in Clydebank
🖥️ Or request a free no-obligation quote online

👉 www.williamswindows.co.uk

 

 

❓ Frequently Asked Questions – Composite Doors Glasgow

What is a composite door?

A composite door is a high-performance front or back door made from a combination of materials — typically including a timber core, insulating foam, and a durable GRP (glass-reinforced plastic) outer skin. This blend delivers superior strength, security, and thermal efficiency compared to traditional timber or uPVC doors.

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What is the difference between a foam-filled and solid core composite door?

Solid core composite doors, like our Stronghold Solid Core range, have a thick timber core (up to 50mm), offering significantly better security, weight, and durability than foam-filled versions. Foam-core doors are lighter and cheaper, but less resistant to impact or forced entry.

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Are composite doors secure?

Yes — especially the Stronghold Solid Core range, which includes:

• Secured by Design accreditation (Police preferred)

• TS007 3-star cylinders

• Anti-snap, anti-bump, anti-pick locks

• Reinforced door frames and security-tested hardware

This makes them among the most secure composite doors in Glasgow.

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How energy efficient are composite doors?

Our solid core composite doors are highly energy-efficient, with U-values as low as 1.0 W/m²K (depending on the model and glazing). This helps keep your home warm and reduces heating bills — ideal for cold, wet Scottish winters.

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How long do composite doors last?

Composite doors typically last 25–35 years with minimal maintenance. They won’t warp, crack, or fade like traditional timber doors. Our Stronghold doors come with a 10-year mechanical guarantee for added peace of mind.

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Can I get a composite door in any colour?

Yes! Williams Windows offers:

• A wide range of standard colours

• Woodgrain finishes like Oak, Rosewood, and Anthracite Grey

• Custom RAL or Farrow & Ball colours on request

• Dual colour options (different colour inside and out)

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Do you install composite doors in Glasgow?

Yes — we supply and professionally install composite doors across Glasgow, Clydebank, Bearsden, Milngavie, Paisley, Renfrewshire, and beyond. Both trade and public customers are welcome.

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How much does a composite door cost in Glasgow?

Prices vary depending on the style, glazing, and hardware, but our high-spec Stronghold Solid Core Composite Doors typically start from £1,600 fitted. Contact us for a free, no-obligation quote.