See exactly what you're paying for.
Hover any layer of the cross-section to learn how it keeps your home warmer, quieter and more secure.
The division halo: the same fibreglass engineering trusted in defence and industry — now at your front door.
Engineering fibreglass since 1993Doors engineered to be lived with.
Eight styles, one four-layer fibreglass construction. Every door carries the same engineering — the look is yours to choose. Figures shown are placeholders for verified data.
The Aldgate
A clean contemporary front door built on GemRock's four-layer fibreglass construction — engineered to stay warm, secure and true for decades. Copy and figures are placeholders.
Panelled heritage looks with a modern fibreglass core.
A characterful stable-style face engineered as one solid, weather-tight unit.
Maximises light with toughened, sealed double glazing.
Engineering breadth you can stand behind.
Doors for the home
Fibreglass front & entrance doors engineered for warmth, security and a 30-year life.
Explore ConsumerIndustrial & commercial
Engineered fibreglass components for demanding industrial and commercial applications.
OverviewDefence & security
Fibreglass solutions engineered to defence-grade standards. Capability enquiries by contact.
EnquireThe outcome you want, backed by the engineering.
Lead with the result; the construction is the proof. Figures shown are placeholders for your verified data.
Energy efficiency
An insulating foam core slows heat loss, so rooms hold warmth and bills stay lower.
U-VALUE · — W/m²KSecurity
Reinforced, impact-resistant construction stands up to force where it matters.
PAS 24 · placeholderDurability
Won't warp, rot, rust or crack like timber or some alternatives — engineered to last.
30-YR · guarantee placeholderLow maintenance
No repainting. Colour-stable finishes wipe clean and stay looking new.
WIPE-CLEAN · no repaintWeather resistance
Performs in heat, cold, damp and coastal conditions without distorting.
−20 → 60°C · placeholderDesign flexibility
A range of styles, colours, finishes and glazing — engineered to fit the home.
18 FINISHES · placeholderThree decades of fibreglass engineering.
From a single foundry in 1993 to three divisions today — the same in-house engineering behind every door. Dated milestones marked placeholder are for the client to confirm.
GemRock is founded
Established to develop and manufacture fibreglass (GRP) components in-house — engineering-led from the very first part.
Defence-grade work
GemRock begins engineering fibreglass solutions to defence-grade standards and tolerances.
Industrial division
The same engineering scales into demanding industrial and commercial applications.
The home, by GemRock
The four-layer fibreglass front door range brings defence- and industry-grade engineering to the front door.
Three divisions, one foundry
Defence, industrial and consumer — all developed and manufactured under one roof.
Engineered here. Trusted across borders.
Homeowners and specifiers from the UK to the Gulf. Placeholder quotes — swap for verified client testimonials before launch.
Three winters in and the hallway finally holds its heat. It still looks the day it went on — no fading, no repainting.
We're on an exposed coast and our old timber door swelled every winter. The GemRock hasn't moved a millimetre.
The fit and finish are on another level. It closes like a car door — solid, sealed, silent.
We specified these across a refurbishment. The thermal figures and the consistency between units won us over.
Engineered for our climate. Minus fifteen outside, warm to the touch inside. Exactly what was promised.
Heat and sun destroy ordinary doors here. Two years on, ours still looks brand new.
Tell us your doorway. We'll engineer the rest.
Request a quote and our team will spec a fibreglass door to your opening, style and finish.