Give Exceptional Service

Topline Windows and Conservatories is based in Waterlooville in Hampshire where we have been manufacturing in-house doors, windows and conservatories since 1980. We use our own experienced fitters and part of our remit is a full after sales service when we supply and fit all products.

We also offer several types of Conservatory Roof Replacement and Flat Roof Glass Lanterns for new builds and refurbished flat roofs.

Come to Topline for your double glazed Windows, Doors, Conservatories.


Topline Windows manufacture and assemble conservatories for clients in the counties of Hampshire, West Sussex and the cities of Portsmouth and Chichester. From this website you can choose the type of conservatory you would like, its size and additional options, and a guide price will be calculated for you.
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Flat Roof Refurb

Fitting included, standard colours both sides, Anthracite Grey/Black Semi-Gloss/White.

If your current roof is of a flat roof nature it should be possible to fit a lantern to your existing roof subject to site survey and existing building regulation certificate.
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Home Extension

Our home extension range with glass roof lantern would be of a brick built nature on exterior walls, with a plaster finish to all inside walls and ceiling. The floor would be self-levelled complete with skirting boards; a choice of white uPVC patio or French or Bi-fold doors; and double glazed windows to suit with inside window boards.
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For your peace of mind we
do not take deposits
We manufacture windows
in-house for quality control

380 Tiled Roof

Great looking, fast fitted, thermally efficient replacement tiled roof that can incorporate full rectangular glass panels. This is a simple lightweight tiled roof perfect for replacing an old tired conservatory roof in one day. There are 3 simple components, making it extremely light and easy to install, faster than any other solid roof onto existing frames.
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UPVC Windows

When you buy your double glazed doors and windows from Topline Windows you can be sure that you are buying the highest grade materials with the best insulation available – and all backed by our 10 year guarantee plus without charge, an independent insurance for the whole of the 10 yrs (For your peace of mind) In association with GGF.
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Panelled Doors

white upvc front door

Top quality exterior uPvc exterior doors manufactured by Topline. Each door has hook locking and keeps which are favoured by insurance companies. Your door will be installed by a Topline installer working to our exacting standards.
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Please view Our Window, Door & Conservatory Brochure

Click to Download

Our Company

Our Company Topline Windows & Conservatories Southern LTD, Draw your attention to complying with the following guidelines:

  • Information Act Compliance – Sent out with each invoice
  • Complaints procedure in place – Sent out with each invoice
  • A 7 day cooling off period from order date, compliant (Seen on contract)
  • Alternative dispute resolution, details sent out with each invoice
  • Any report about Topline can be registered at website – located on information page
  • Customers to read Terms & Conditions from order/contract prior to signature
  • For GGF customer charter, and protection for the consumer Click Here or contact Topline for a copy

Call us today for a free quotation

No representative will call unless specifically requested
No pressure sales techniques, we are a family-run business


Some of our recent installations (click to projects to learn more)

Latest Projects

Edwardian conservatory

Edwardian conservatory Havant

Conservatory / glass lantern roof
Chartwell Green

Replacement windows Waterlooville

Bungalow Extension

conservatory near portsmouth

Double Glazing Installation
Butser Hill, Waterlooville

Double glazing installation Butser Hill

Roof Lantern Conversion
Waterlooville, Hampshire, PO8

Glass roof lantern conversion Waterlooville PO8

Quality is Our Passion

Manufacturing in-house

TopLine have been manufacturing in-house doors, windows and conservatories since 1980

Experienced fitters

We use our own experienced fitters and part of our remit

After sales service

Full after sales service when we supply and fit all products.

We strive to make the installation process for doors, windows and conservatories as smooth and trouble free as possible and from time to time we get nice comments from our customers:

Topline Windows: Comments from our Customers