ASD Servicing

Emergency Composite Window & Door Repairs – Fast, Reliable, Experts

Approved Specialists for Velfac & Rationel.

Urgent Help for Lockouts, Repairs, and Maintenance.

Approved partners of

Trusted Specialists

in Premium Window & Door Care

As industry veterans, ASD Servicing has become the trusted name in composite window and door maintenance. We specialise exclusively in Velfac and Rationel systems, delivering expert repairs and servicing that maintain the premium quality these brands are known for.

Our team of certified technicians brings decades of combined experience to every job, whether it’s an emergency lockout or scheduled maintenance. Being approved partners for both Velfac and Rationel means we work to manufacturer standards, using genuine parts and approved techniques to ensure your windows and doors perform exactly as designed.

What Sets Us Apart:

Years of Experience

Windows Replaced

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Doors Repaired

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Happy Clients

Velfac and Rationel Specialists

From emergency lock repairs to full door replacements, ASD Servicing handles every job with precision and care. No project is too big or too small – whether you’re locked out, need a modern upgrade, or want to protect your investment with routine care, we’re here for you.

Repair

Broken handles, faulty hinges, or sudden lockouts? Our emergency repair service restores functionality swiftly. As approved Velfac and Rationel specialists, we use genuine parts and proven techniques to resolve issues without delay.

Replace

Replace cracked glass, damaged doors, or outdated fixed windows with modern, compliant opening units. We install genuine Velfac/Rational components to ensure performance matches the original design.

Maintain

Avoid costly repairs with routine inspections, lubrication, and AOV testing. Our maintenance plans keep your composite systems safe, compliant, and operating smoothly for years to come.

Our projects

Your Composite Window & Door Specialists

Composite windows and doors are engineered for premium performance – but when they fail, you need expert care. ASD Servicing is an approved service partner for both Velfac and Rationel systems, providing specialized repair and maintenance across the UK.

Emergency Repairs

Broken handles, faulty hinges, damaged seals, or lock failures? We’re here 24/7.

Locked Out Assistance

Regain access swiftly and safely, without damaging your door.

Routine Maintenance

Prevent issues with expert inspections and servicing.

Composite Expertise

We work ONLY on Velfac and Rationel systems – no guesswork, just proven solutions.

What our customers say

At ASD Servicing, we measure success by the satisfaction of our customers. Homeowners and businesses across England and Wales trust us to resolve urgent issues, deliver lasting repairs, and protect their investment in premium Velfac and Rationel systems.

Don’t just take our word for it – here’s what our clients say:

I was locked out of my patio door late on a Sunday night. ASD responded within an hour, fixed the mechanism without damaging the frame, and even tested the AOV compliance. Their expertise saved me time and stress – I’d recommend them to anyone!

Seb Parker

Home Owner

ASD Servicing

Expertise You Can Trust

ASD Servicing has been the go-to specialist for Velfac and Rationel composite window and door solutions.

As an approved partner, we combine technical mastery with a commitment to urgent, customer-first service. Every repair, replacement, and maintenance job is handled with the precision these high-performance systems demand.