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To use our design and manufacturing skills to provide quality and value for money in our products, which in turn will give long-term enhancement & maintenance free to your property.

We supply & install our products in both PVC-U, Aluminium, Composite and Timber.

We have therefore built up a loyal customer base to whom we have supplied and fit throughout the south-west.

Fensa Registered

LF Replacement Windows is a Fensa registered Company Fensa works with thousands of double glazing contractors in England and Wales. In choosing a Fensa double glazing registered company the consumer is protected when purchasing double glazing for their home.



Opening Hours


Mon-Fri- 9am to 5pm

Sat- 11am to 3pm

Sun - Closed

Bank Holidays- Closed


About LF Windows and Conservatories

L F Replacement Windows Ltd.
Bumpers Farm Industrial Estate
Wiltshire SN14 6LH

LF Replacement Windows & Doors & Conservatories

L F Replacement Windows was established in 1979 and has built up valuable expertise in windows, doors and conservatory manufacturing and installing during the last thirty two years. We are based on Bumpers Farm Ind Est, Chippenham, Wiltshire in our own manufacturing site.

Today's range of PVC-U windows, doors and conservatories is the most exciting we have ever created. Furthermore, it is unsurpassed in both the design and quality of its PVC-U window products. We manufacture products from the Deceuninck 2500, 2800 and 3000 series profile systems.

Operating as a Deceuninck fabricator since 1986, we now offer the full range of profile systems available from Deceuninck.

We also offer our timber and aluminium window, door and conservatory range profiles which are manufactured in the UK
Please select from any of the above products for additional information.

The Fensa Trustmark Scheme Registered  L F Replacement Windows with there own Energy Effiecient Labels for both and 'A' and 'C' window energy ratings which are now available on UPVC casement window products on all our Deceuninck profile systems.

During this period we have built up extensive experience in the manufacture of windows, doors and conservatories.

We are  FENSA  registered; additionally, all our workmanship is covered by a comprehensive 10 year guarantee. 

L F Replacement Windows is an audited company using a UKAS accredited company. 

The United Kingdom Accreditation Service is the sole national accreditation body recognised by the British government to assess the competence of organisations that provide certification, testing, inspection and calibration services

Our Reputation

 Our fully trained workforce is sourced within the local area.

We are particularly proud of our ongoing training scheme and, through our link with Salisbury College, are able to ensure that we can provide NVQ Level 2, 3 & 4.for our employees.

Many of our installers have now worked for us in excess of 15 years and take a particular pride in their work and in your home.

For your windows, doors and conservatorie home improvements in the Wiltshire county area we are the specialists because we have been making and installing our own products since 1979, we can sell direct to you at affordable prices with first class customer care and service. We're continually developing and improving our range of double glazed windows, windows, doors and conservatories, with security, design and budget in mind, as well as an emphasis on energy efficiency and the environment.


Where we cannot resolve any complaints using our own complaints procedure, as a Which? Trusted trader we use Ombudsman Services Ltd for dispute resolution. In the unlikely event of a complaint arising and you wish to refer the complaint to them please contact Which? Trusted traders in the first instance on 0117 981 2929.

IMPORTANT NOTE TO EXISTING CUSTOMERS In April 2016 LF Replacement Windows was incorporated into LF Replacement Windows and Conservatories Ltd, in the unlikely event that you are experiencing any problems with your installation we are happy to resolve them for you, under the original 10 year warranty

Please download Click Here. our complaints procedure document assisting you on how to achieve a successful result.


which trusted trader

We offer a FREE, no obligation quote service.

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Window & Door Brochure





Our products have a comprehensive 10 Year guarantee, which includes the hardware (handles, hinges, locks)


Example of a Label



We do Offer our Surplus Windows for Sale and if you would like a copy of these please Click on the Red Button and we will email you our list of Surplus Stock Available

Click Here



With effect from the 25th May 2018 the new General Data Protection Regulations come into force

L F Replacement Windows Ltd. is the data controller for your personal information you provide us to carry out any contracted works you instruct us to,  sometimes it is necessary for us to pass your information as permitted by law to our Fenestration Self Assessment Scheme provider, currently we use FENSA and they in turn will automatically pass your personal information to our preferred Insurance Back Guarantee company who is currently HIP Insure other than these we personally only share your information within our own company colleagues. We will not share your information with any other Third Party unless we are permitted to by law or ask for your permission. 

Further information about how L.F Replacement Windows Ltd uses your personal data please call 01249 655077