composite entrance doors

Buy now pay nothing until 2020
only £99 deposit

3 years interest free credit

Buy now pay nothing until 2020
only £99 deposit

3 years interest free credit View finance options

Double glazing installations in Northamptonshire, Milton Keynes, Oxfordshire and beyond

Operating out of Wellingborough since 1979 as a leading home improvement company, T&K has proudly served Northamptonshire, Buckinghamshire, Leicestershire, Bedfordshire and surrounding areas for over 40 years . We’ve manufactured and installed replacement windows, doors, conservatories and much more for over 60,000 homes during this time. Founded by Kevin Johnson, the bespoke home improvement company remains proudly run by the Johnson family today, retaining a family ethos that ensures for an astounding and personal service.

Whether you’re looking for replacement windows in Northampton, double glazing in Wellingborough or conservatories in Aylesbury from a local window company, we have the expert experience and local Northamptonshire knowledge to serve you with an excellent installation or repair, including conservatory refurbishments. If you’re looking for uPVC windows and doors near me or a conservatory showroom in the Northamptonshire area, take a visit to our Wellingborough double glazing showroom to see our range of attractive home-improvements for yourself, including verandas for Oxfordshire, Aylesbury windows and double glazing in Northampton!

40 years as a local window company installing double glazing in Northampton


40 years’ experience

With over 40 years’ home improvement trading experience, T&K has built up an unparalleled level of product, security and installation expertise, offering glass in Northampton and double glazing in Rugby and Milton Keynes.

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Double Glazing Finance

With buy now pay later and interest free credit finance options available, improving your Northamptonshire home couldn’t be easier with T&K, including an interest-free conservatory and excellent double glazing finance.


Fully accredited

T&K is now fully accredited by all relevant regulatory bodies, including Secured by Design. and DGCOS. We've also been awarded top Trusted Trader status as a member of Which?'s Trusted Traders scheme.

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10 year guarantee

Any home improvement installation work performed by us comes with a 10 year guarantee, as standard.


Servicing & aftercare

T&K provides a devoted aftercare service for our home improvement installations. Once your double glazing installation is complete, our expert team will remain on hand to ensure it keeps functioning as it should. We've also got a range of great guides for homeowners looking to keep their products at their optimal performance.


Highly recommended

We’ve built up quite a reputation as a leading home improvement company in Northamptonshire since we started trading with double glazing in Wellingborough, resulting in many of our customers recommending our home improvement installations to others.


Every uPVC product we install at T&K has been exclusively fabricated by our sister company Emplas, who have over 35 years of experience in uPVC manufacture. This means we have direct influence on quality control and we’re able to offer ultra-quick lead times on our uPVC products.

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Fabulous from start to finish

Fabulous from start to finish. I would have no hesitation recommending your organisation. Thank you […] for their professionalism.



couldn’t have asked for more

Throughout the process, he couldn’t have asked for more. All the staff have been helpful and friendly, and the finished installation is fantastic.



Competitive quote

Competitive quote – installed within two weeks. Excellent product professionally installed. Well done!



I would recommend T&K to anyone!

I would recommend T&K to anyone! They have done a fabulous job installing a new front door and canopy. First class job!



Job well done

Job well done. Really pleased with the quality of the workmanship and a great bunch of guys. Left the place spotless.



excellent company

We have had all our doors & windows replaced by T & K, excellent company.



Fantastic company

Fantastic company that designed the perfect conservatory for my home and at a very cheap price, I would recommend them to anyone.



Thank you for my recent installation

Thank you for my recent installation. I am delighted with the result, and would recommend your organisation without hesitation.


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Fully accredited, award-winning company

With full accreditation from the appropriate regulating bodies and a number of glazing awards to our name, you can feel assured of the quality that’s on offer.

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Which? Trusted Trader
Secured by Design
G16 Winner
G15 Winner
G14 Winner
G12 Winner

Serving homeowners across Northamptonshire

During our tenure as traders, we’ve provided bespoke home improvement solutions across the Northamptonshire area and beyond. This includes Corby, Northampton, Bedford, Kettering, Milton Keynes, Cambridge, Aylesbury, Oxford, Rugby, Bicester & Luton.

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