Harkness Glass
True Windows
Have Now Merged.

True Window & Glass Centre

The Wise Choice for uPVC and Aluminium
Windows, Doors, Bi-folding Doors and Conservatories.

Covering Lincolnshire, Nottinghamshire and the Midlands.

Click or Tap Image for Required Product

Link to upvc and aluminium windows page
uPVC & Aluminium Windows
Repair and Maintenance for upvc, Timber and Aluminium
Repair and Care Service
Button through to upvc conservatories page
uPVC Conservatories
Link button to painted splashbacks page
Painted Glass Splashbacks
carports, porches and canopies fully installed.
Carports, Porches & Canopies
Link to Trade Counter page
Glass Shop and Trade Counter
Bi-Folding Doors fully installed available in Aluminium or uPVC
Bi Fold Doors
24/7 hour emergency glazing and boarding-up services
24/7 Glass Repair and Boarding-up Services
A Full Range of Quality Composite Doors
Composite Doors
Information and examples of French Door installations by TWG.
French & Patio
Link button to stylish uPVC doors by True Window and Glass.
UPVC Doors
True Window and Glass Centre provide a range of glazing services to the trade and public across Lincolnshire, Nottinghamshire, Norfolk, Cambridgeshire and the Midlands. Including the repair and installation of energy efficient window systems and secondary glazing, conservatories, bi-folding doors, French and Patio doors in uPVC or Aluminium for Housing, Flats, Schools and Commercial Buildings. We also supply and install bespoke glass items such as painted glass splashbacks and glass shelving. Our Trade and Sales Counter can supply double glazed window units manufactured here at our Lincoln HQ including slim-line Heritage units along with a range of products and sundries.

True Window and Glass Centre are renowned for their specialist maintenance, repair and upgrade service for upvc, timber and aluminium windows, doors or conservatories.

We also stock spare and replacement window and door parts available to Trade and DIY via our Sales Counter.

Open Monday to Friday
7.30am – 4.30pm
Closed Saturday and Sunday.

24/7 Emergency Call-Out
Glass Repair and Boarding-up service:

07823 341559

Please note our mobile number is for the
24 Hour call-out only.
For general enquiries please use
01522 500892

We Are Hiring!

Experienced Window Fitters
Fitters Mates
Trainee Fitters

Must be 25+ years of age with full clean driving licence.

Why Choose Us …


  •  Family Run Business with over 40 years trade experience.


  •  Qualified Tradesmen: no subcontractors


  •  All work is guaranteed


  •  Open and honest pricing with quotes that are good for weeks – not hours.


  •  We do not knowingly put pressure on our customers to sign-up for any of our products.


  • Our customer focused service, flexible approach and quality products mean that we enjoy a long-term relationship with our customers.


  •  FREE, no-obligation estimate service so you know ‘how much’ before we start any work.
TWG General Coverage Area

Whilst based in Lincoln True Window and Glass Centre service the general areas of:

TWG Repair and Installation Area


We also cover parts of:

We live off the recommendations of others, along with customers who return again and again.

The excellent end result has benefitted from close and careful attention by many of your staff – Mr & Mrs Hockley