Benefits of replacement windows:

There are many benefits to replacing your home's windows, some of which are more obvious than others. For advice in choosing the right window installer for you and avoiding the cowboys check out our handy guide to choosing a window installer. Below are the three core benefits of replacing your windows with Thetford Home Improvement Services:

  • Reduce the amount of energy your home uses and save £1000's on your energy bills.

  • Enhance the aesthetic of your home with great looking replacement windows.

  • Improve the security of your home - receive £5000 if an intruder breaks in via your windows.

PVCu Eco-Energy Windows


Liniar Eco-Energy Double Glazing

Fantastic Thermal Efficiency, Superior Security, Beautiful Finish.

All of our windows are installed and finished to the highest standard, we pride ourselves on our workmanship and attention to detail across our entire range of products. As company policy we only purchase and install the highest quality products, our double glazing and replacement windows are no different. 
As standard we install the superior Liniar Eco-Energy window system, its unique 6 chamber design and patented bubble gasket technology are designed to maximise the thermal efficiency of the windows by preventing the warm air of your home escaping while simultaneously preventing the warm air of the outside getting in. Because of the profiles unique design there is no need for any steel reinforcement which therefor eliminates any thermal breaks.
Our Liniar Eco-Energy Double Glazed windows are fitted with an ERA locking system which is fully covered by ERA, should someone break into your property via your windows you will receive a payment of £5,000 and have the window replaced FREE of charge. 


Flush Casement Windows (Residence Collection)

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Flush Casement Windows

Looks Great, Perfect for Conservation Areas, Traditional and Contemporary.

As the name suggests the casement of our flush fitting window sits flush against the frame, this is less obtrusive than our standard PVCu windows and provides a cleaner finish. Designed for use in conservation areas to replicate timber windows without the same expense or levels of regular maintenance required.  
Despite this our flush fitting windows look equally at home in more contemporary homes because of its simple, minimalist architectural lines , especially in a smooth finish. 
At Thetford Home Improvement Services, we're proud to supply and install the residence collection of flush fitted windows, available in both double and triple glazed options. We offer both the R9 and R7 system, the former is defined by its mechanically fixed joints, 100mm, 9 chamber profile; designed to replicate the thicker timber window frames of years gone by, and the latter by its slimmer 70mm profile and is available both mechanically jointed and welded. 


Aluminium Windows 

Aluminium Windows

Strong, Architectural Look, Slimmer Frames.

A former household favourite, aluminium had fallen out of fashion not too long ago, but has started to make a steady comeback recently, spearheaded by advancements in technology and a rejuvenated interest from architects and the new build sector. Aluminium is becoming ever popular with homeowners looking for replacement windows. 
As a material aluminium is much stronger than PVCu and therefore our aluminium windows can be made with much slimmer frames and more glass offering more natural light into a property. Also because, as we've already covered, aluminium is growing in popularity in the new build sector it also helps to give existing properties an architectural ultra modern look. 

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Triple Glazed Windows

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Triple Glazed Windows

Minimise Noise, Thermally Superior, Economical.

All of our replacement window options are available triple glazed, triple glazing adds a third pane of glass to your windows sealed unit and comes with a number of benefits over standard double glazing, including better thermal performance helping to further reduce your energy bills, saving you money. Triple glazing is also better for keeping out sound and is very popular with homeowners who live next to busy roads, or noisy neighbours. 



At Thetford Home Improvement Services we offer our customers three separate guarantees on their replacement windows:

  • Our own company 10 year guarantee.

  • Our manufacturer's 10 year guarantee.

  • An insurance backed 10 year guarantee, meaning should anything happen to us as a business your guarantee will still be honoured.


Three 10 year guarantees


Everybody is different and everybody has different ideas about the perfect home, and new windows are no different. Over the past 4 decades we have worked closely with hundreds of thousands of customer, to help them choose the perfect windows for their homes. Our team of dedicated design experts work closely with you to help you choose the perfect design for you and your home. With 10,000's combinations of style, colour, glass and finish options available, we're confident that we can provide the perfect windows for everyone. 


Dedicated Design Experts


Your home is your castle, we understand how important security is to our customers and we strive to offer the most secure products we can. Our windows are no different, as standard we sue the ERA multi-point window locking system. ERA are internationally renowned lock experts and have used their decades of experience to develop and produce the highest standard of locking system. In fact ERA are so confident in their window locking system that they are willing to give you £5000 cash and replace your window for free should somebody break in via your window lock.


£5000 cash if there's a break in.


Never stop being such a friendly, family run business! 10/10
— Mr & Mrs Brown - Watton - 2018
Everyone we have dealt with have been very friendly and knowledgeable. This is the second product we have bought and are very happy to use again
— Mrs Boome - Northwold - 2018

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