Double Glazing


New Double Glazing -Make Your Home Warm,Quiet And Extra Secure With Our New Double Glazed Windows.

In these days of energy cost awareness and high bills, this offers householders cost savings on heating bills 

Saving you money on your energy bills by keeping the heat inside your home.
Up to a staggering 25% of all domestic heat loss escapes through the windows in your home. Simply by installing energy efficient windows, you can save money on your heating bills compared to standard double and triple glazing.

Making your home quieter with increased insulation which means less outside sound can enter – ideal if you live near busy roads or schools.

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  • Less condensation
  • More comfortable rooms
  • Low maintenance. Built with your full days in mind, our products are almost care free.
  • More secure with robust security measures.
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  • Reduces your carbon footprint by improving your energy efficiency.

High Performance Sealed Units

Improve the energy efficiency of your windows and help reduce your heating bills with our advanced soft coat sealed units.

  • Soft coat High efficiency improved thermal insulation – Promotes passive solar heat gain –

Seal Unit Options

Replacement Double Glazing Derry

Although double glazing has been popular in many British households for the past few years, there are still many homes, tolerating the inefficiencies of single glazing that are characterised by poor heat retention and higher energy bills. Replacing single glazing with double glazing has an instant significant impact in your energy expenses at home. You’ll soon notice lower energy bills which is welcome considering energy bills keep rising every year.

We offer a range of glazing services including single panes or double glazed  units, we can supply and fit into all types of windows and doors i.e. timber, aluminium and UPVC. If you fancy yourself as a bit of a handyman we also offer supply only double glazed units or single panes of glass including toughened, leaded units and Georgian bar units. All units are available in a variety of thicknesses and we can match the spacer bar to the unit that is being replaced.

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All Purpose Glazing is a specialist glazing Window and Door company. All our products are custom manufactured on an individual basis to match your own personal requirements. We stock a  fantastic choice of  glass for windows and doors. we are convinced that you will find what you are looking for.

Double Glazing Replacements- Bespoke Glass Sealed Units

All of our double glazed units are manufactured to our customer’s specific double glazing needs. We supply and install new double glazed sealed units made-to-measure in a number of shapes, styles, colours and textures.


Stepped Units
Shaped Units
Georgian Bar and Back to Back Spacer Bars
Swiss / Warm Edge Spacer Bars
Low E & Self Cleaning Glass Units
Decorative Lead Overlay Units

Quality, Service and Price Assured

With more than 30 years industry experience, we pride ourselves on our customer service, technical expertise and comprehensive product range. All purpose glazing- experience you can trust.

All Purpose Glazing offer a professional and reliable glass replacement service within Derry City right across  Northern ireland and the surrounding counties of Donegal, Louth, Cavan, Monaghan, Sligo and Leitrim.

Local Glazing Installer

The company now operates throughout Derry, the north west and surrounding areas installing and replacing broken down Double glazing units. Our strong reputation in the window and door industry has been built upon strong management, excellent customer services, time tested double glazing products and our professional fitting teams.

Double Glazing Supply Fix and Maintenance

Our team of highly skilled fitters all have years of experience in the trade and all have to be trained to high standards with customer care and quality being the top priority. We offer a window maintenance service, so if you are having any difficulty with locks or your window or door is in need or repair then give us a call .

Window Repairs, Is your window suffering from excess condensation or is it steaming up easily?

This is likely the result of a failed glazing unit. Your double glazed glass unit could be quickly remedied by having it resealed or by having your glass unit replaced by our competent engineers at an affordable price.

There is frequently no need to replace your current window frames, only the glazed unit within, therefore work can be completed in 1 day.

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 Double Glazing In Derry Call 02871 357 444

Broken Double Glazing Replacement With New Units

If both sides of the glass are broken we can glaze a board or a single pane of glass into the aperture, or build a sub-frame and board over the window. If just one side of the unit is broken we can use a clear safety film to hold the broken glass together or de-glaze the one broken side, leaving the other intact.

Double Glazing Repairs
We can solve any problems associated with double glazed window repairs. Whether your double glazed unit has misted up, the glass is broken, or the window will not shut properly, we’re here to help with your double glazing repairs. 

Misted Up Double Glazing

Missted failed double glazing because the seal has broken down and moist air has got in between the two pieces of glass. With the change in temperature, the moisture in the air condenses on the inside of the glass. Failed units are not only unattractive but they are less efficient.

If the sealed double glazing units. has misted between the two panes or one of the panes is broken you will need to have a new unit made. This will require a glazier to come to your property and measure. We will normally be able to return with a replacement unit within 7-10 working days.

We also offer an express order service where possible, so that in certain circumstances the unit can be re-made and fitted within 24 hours.

Over 30 years experience supply and installing glass in derry. From standard double glazed units to 5 star energy efficient glass, we can supply units to meet your budget and specifications. We offer a huge number of different types of glass so whatever your needs you can come to us with confidence.To speak to one of our team, please  Call us on 02871 357 444, or leave use a message to request a quote  and we’ll call you back

Why Choose APG as your Double Glazing Installation Company.

Having worked in the glass industry for well over 35 years we have a depth of knowledge that can help you in your home improvement of any size. we specialise in ALL ASPECTS of glass and glazing.

At All Purpose Glazing our ultimate goal is leaving all our customers more than satisfied. We ensure our glass is of the highest quality, meeting and exceeding all relevant Building and Energy rating regulations.

We supply and installs a wide variety of glass and glazing
services right across Northern Ireland. 

Call us

Mon-Friday-8am-4:30pm

+44 (0) 2871 357 555

About us

One of Ireland oldest glaziers, A  family run business with care  for  customers at the  heart of our business. providing a comprehensive range of glass and glazing products, design and installation services; workshop facilities, as well as in-house installation and servicing teams. We are based in Derry City but have supplied and installed glass all over  Ireland. 

Our mission

Involved in all aspects of glazing, we are the region’s leading glazing provider.  Our drive to provide great service is reflected in our work.

Our staff are all time served accredited glaziers with vast experience to ensure that every job is completed to the highest standard. Your staff are here to help with any glass or glazing enquiry you may have.

Our offer

  • Care & Attention To Our Customers
  • Full Range of Glass Stock & Glazing Services
  • Cost Effective Experienced Trade Supplier

We are dedicated to providing a complete range of glazing products, installed by our in-house teams of experienced and qualified fitters.