Our Clanfield showroom is next to the Co-op and the car park onsite is free. 

Denmead is opposite the co-op offers a free car park.

Clanfield:
14 White Dirt Lane,
Clanfield, Hampshire, PO8 0QL
Google Maps

Tel: 023 9259 1001

Denmead:
The Old Post Office House,
Denmead, Hampshire, PO7 6NN
Google Maps

Tel: 023 9225 1122

Unlike the window and door giants we have a no hard sell policy within our showrooms. We have a strong reputation for our expertise, and our friendly approach. We will never push and there is no obligation to buy. Our quotes and time is free! Why not come in and meet the team.

More Info about us

We offer a 10 year guarantee on all of our supplied and installed windows and doors (not including glass)

Windows: Supply and installation of double and triple glazing solutions (including UPVC, aluminium, hardwood, and Velux systems) aimed at improving energy efficiency and security.

Doors: A wide selection of composite front doors (including Solidor, CompDoor, brands), back doors, stable doors, French doors, patio doors, and aluminium bi-fold doors.

Smart Security: Offering options like HomeGuard+ integrated with Yale SensCheck™ technology for real-time digital monitoring of windows and doors.

Glass Balustrades

For external or internal use. Stair banisters, juliet balconies, and garden partitions. Find out more here

Conservatories & Orangeries

Bespoke design and construction of orangeries and conservatories to expand living spaces.

Options include standard models as well as Residence 9 orangeries, which replicate traditional 19th-century timber designs.

Roofline Products

Supply and installation of home exterior basics, including fascias, soffits, and guttering.

General Building & Home Improvement Services

In addition to glazing, the company coordinates various building works through trusted tradesmen to act as a "one-stop shop." These services include:

• House extensions and loft conversions

• Carpentry, stairs, and flooring

• Plastering, rendering, painting, and decorating

• Electrics, plumbing, heating, and tiling

• Garden/retaining walls and patios

It’s easy to use on a desktop or mobile. Click on the brand you’d like to have a look at, choose frame sizes, colours and features.

If you have trouble: Reach out through our contact form or schedule a call—we’ll walk you through the next steps and answer any questions along the way.

Click here for our doors page

Yes, absolutely. Every single window and door we install is completely bespoke and made-to-measure. Homes on the South Coast come in all shapes and sizes, so we measure your openings down to the millimeter. Beyond custom sizing, you can fully tailor the design—choosing your exact frame style, material, color, glass pattern, and hardware to match your home's character.

Want to know more about:

Windows?

or

Doors?

The best ways to reach us are by telephone, or via the contact form on our website.

Deanmead:

Open times: 8.00am to 5.00pm Monday to Friday. Saturday-Closed

The Old Post Office House, Denmead, Hampshire, PO7 6NN
Tel: 023 9225 112

Clanfield:

Open times: 8.00am to 5.00pm Monday to Friday. Saturday-Closed.

14 White Dirt Lane, Clanfield, Hampshire, PO8 0QL
Tel: 023 9259 1001

We’re on social media too!

you can find us on instagram or facebook.

The primary difference lies in their construction and overall feel. PVC doors are made using a lightweight, durable plastic frame reinforced with steel, offering a clean look and excellent weather resistance. Composite doors are engineered from a blend of premium materials—including a solid timber core wrapped in a glass-reinforced plastic skin—making them thicker, heavier, and able to provide an authentic wood-grain appearance with enhanced structural strength.

Click here for more about our doors

Yes, all of our glazing solutions are designed to optimize thermal performance and improve your home's energy efficiency. By utilizing advanced double or triple glazing alongside multi-chambered frames, our products effectively trap heat inside your home while blocking out cold drafts. This advanced insulation helps maintain a consistent indoor temperature year-round and reduces the energy required to heat your home.

Find more information about our windows here.

Security is at the heart of everything we install. Our doors feature advanced multi-point locking systems, including options like the industry-leading Ultion locks and integrated Yale smart security technology. These mechanisms secure the door at multiple points along the frame rather than just at the handle, offering robust resistance against forced entry and giving you total peace of mind.

Yes, the price we quote you is entirely transparent and fully inclusive. It covers the cost of the premium products, the professional installation by our expert team, and the safe removal and disposal of your old windows or doors. There are no hidden fees or surprise add-ons.

Yes we can! unless requested we can dispose of these for you. Just let us know if you’d like to keep your old windows and doors, some people do and that’s ok.

Our showrooms are located in Denmead and Clanfield (near Portsmouth), and our primary installation service area covers the South Coast.

We regularly work in Hampshire, West Sussex, Southampton, Portsmouth, Fareham, Winchester, Chichester, Petersfield and all the areas surrounding.

If you are unsure whether your property falls within our coverage area, please get in touch with our team, and we will be happy to assist you.

No appointment is needed! You’re welcome to visit either of our showrooms in Clanfield or Denmead during our opening hours (Monday–Friday, 8:00 am – 5:00 pm) to explore sample windows, composite doors, and living space options. If you'd like to discuss a complex project with a specialist, feel free to give us a call beforehand so we can ensure we can provide you with lots of time and share our expertise.

Click her to book.

Or call: Clanfield 023 92591001

or

Denmead 02392 251122

Yes! Our Solidor or Compdoor designer suites are ready for you to use, to explore colours, shapes, hardware and glass.

Why not try it here.

Absolutely. We provide free, no-obligation quotes and design consultations tailored to your home and budget.

We never chase and will never push our customers. 

We require a 40% Deposit when booking an appointment to measure & order.

Contact us here

We partner with industry-leading manufacturers, including Solidor and CompDoor, offering high-security, energy-efficient composite front and back doors in a vast range of colours, styles, and hardware finishes. You can even design your door using our online door designer tools before requesting a quote.

Click here for our doors page

Yes! We offer a wide range of frame finishes—from classic White and Anthracite Grey to Chartwell Green and natural woodgrain effects—along with bespoke glass patterns, handles, and locking options.

find out more on our doors page

Do you offer general building services alongside window/door installation?

Yes. Unlike standard window fitters, Glasstec offers comprehensive building services. Whether your project requires brickwork, plastering, groundworks, or knock-throughs for new doors or extension spaces, our in-house building team handles the job from start to finish.

Click here for more