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Tel: 02844832973

Mob: 07912217692

Email: improve@completehi.co.uk

Complete Window Systems

14 Rademon Avenue


BT30 9NX

© 2023 by IWD. Proudly created with Complete Windows NI

Northern Irelands Leading PVCu and aluminium supplier and installer.

Supplying and installing PVCU, Aluminium and composite windows, doors and roof systems to home owners in Belfast, Downpatrick, Bangor and County Down.

Who we are

Complete NI are a proud, family run business, who are here to help make your home improvements run smoothly. Our aim is to guide you through every step, whether it be replacing windows, doors or roofline in your home, adding a conservatory, sunroom to your property, changing a conservatory roof, or repairing that leaking flat roof, we provide a personal and reliable service, paying attention to every detail. We are specialists in uPVC, aluminium, timber and composite systems, we will tailor-make a bespoke solution to suit your requirements.Why not find out what makes Complete tick – who we are, the range of products that we offer, We would be delighted to hear from you so why not contact us today.

What we do

Planning that dream home improvement or that new extension can be a problem - we're here to help make it a lot more simpilar and stress free for you when it comes to choosing your new PVCu windows or that aluminium Bi-fold door. Due to our glazing experience gained working with PVCu, aluminium and composite we will assist you or your contractor from initial design stage to completion. Doors, windows, conservatories, sunrooms, - we can plan it all and help create your desired living space.

What Products We Offer


Our PVCu

Our PVC windows offer optimal thermal and acoustic insulation, with a wide range of colours.

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Create a lasting first impression with an Everest composite entrance door. From traditional to contemporary designs, our bespoke front and back composite doors are handcrafted in Ireland and the UK.

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origin bifold

High quality aluminium windows and doors.

Virtually maintenance-free and energy efficient, our premium grade aluminium combines strength and robustness with a lightweight structure - extremely strong yet weighs 67% less than steel.

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A roof system for all.

Here at Complete we can supply and install roof windows and lanterns, flat roof installation or repairs, conservatory roof conversions and roofline fascia, soffit and guttering.

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epdm flat roof

Customer Payment

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