canterburyglassandglazing.co.ukEmergency Glaziers Canterbury

Canterbury How To Measure A Double Glazed Unit

How to measure a double glazed Window

           HTMG     

Most double glazed sealed units in PVCu frames are either 24mm or 28mm thick and wooden frames can be any thickness from 14mm upto 28mm thick. You should be able to check with your supplier for these dimensions. If you purchased the windows/doors a long time ago the information should be on your receipt or warranty.

If you do not have this information to hand then you will have to calculate the measurement yourself. This is tricky but it can be done and you will need a tape measure and a straight edge such as a piece of wood.

Firstly measure how thick the PVCu frame/opener is and then place a straight edge against one side of the frame and let it protrude into the area of the glass (as the picture above).

As the straight edge will be flat against the PVCu, it should be floating away from the glass. Measure the gap (A to B) from the glass to the inside of the straight edge and write this down. Do the same with the other side of the frame and note the measurement again.

To calculate the thickness of your double glazed sealed unit you would need to deduct these 2 measurements from the thickness of the PVCu frame and you should have a measurement of either 24mm or 28mm.

As an example, the frame that holds the glass is 62mm thick, the A to B gap (as the photo above) of one side is 17mm and the A to B gap of the other side is also 17mm. This gives us a measurement to deduct of 34mm. 34mm deducted from the frame thickness of 62mm is 28mm and this figure is the thickness of the sealed unit in this frame.

Emergency Double Glazed Safety Glass

Disclaimer
The tips and advice on this page are just a helpful insight into measuring and installing of glass panels. canterburyglassandglazing.co.uk does not accept any responsibility if you are injured or suffer loss - financial or otherwise by following our tips and advice from this page. These tasks should only be undertaken by a competent person that is skilled in DIY and should not be attempted by DIY novices.

If you are not a competent person in DIY we advise that you hire a tradesman to undertake your glass measuring and installations. canterburyglassandglazing.co.uk do not accept responsibility for the incorrect measuring of your glass. The only guaranteed way to get accurate glass sizes is to obtain the sizes from the window/door manufacturer at time of purchase.

Double glazed units

Double glazed units

Offering a professional replacement double-glazed unit service throughout Canterbury & surrounding areas.

If your looking for replacement double glazed units without the massive extra cost of new frames then look no further.

Replacement double glazed units only

Has your double glazing got condensation in side the glass, misted up or been broken, then give us a call. 

Same day double glazed units

For a non toughened safety glass units, we can make for you a same day or next day service which we can either deliver for a small additional charge or you can collect direct from our factory. For toughened safety glass units, these can be typically re maunuactred within 3-5 working days from point of ordering.

Free over the phone quotation

We offer you an immediate quotation over the phone subject to view, we will ask a few very back questions, approx size, single or double glazed, window or door for the example and from this can offer you a price immediately.

See more
Emergency glazing

Emergency glazing

24 hour emergency glazing, glass replacement, window repair in Canterbury. We operate in Canterbury. Emergency glazing, call any time of the day or night. Double glazed units, patio door glass, accident or break in, we are here to help.

Learn more

Frequently asked questions

This type of glass adds additional strength to your windows. To gain entry, a burglar would have to strike the glass repeatedly in the same spot in order to make a small opening. Most burglars are reluctant to create this type of noise for fear of being detected.

Look closely at the glass edge: tempered glass will have a smooth, slightly rounded edge without sharp corners. Untempered glass has a sharp, unfinished edge. You may also notice small nicks or divots in the glass edge. Tempered glass has undergone intense heating and rapid cooling, so its surface is more durable.

Annealed Glass      Less expensive, Good visibility
Laminated Glass    Strong material, shatter-resistant glass
Low-E Glass          Energy-efficient, thermal coating that lasts 10 to 15 years
Tinted Glass          Promotes greater privacy, heat transfer resistant

These glass sheets are held together permanently by an interlayer such as polyvinyl butyral (PVB). Laminated glass is about two times stronger than standard float glass of the same thickness, with the advantage that in case of breakage, it generally holds together by breaking into a spider-web pattern.

Laminated glass products make float glass suitable for today's demanding architectural applications such as: noise reduction, hurricane impact-resistance, blast mitigation, forced entry, protection from broken glass – or a combination of these.

Float glass: This is the most budget-friendly and has no natural tint. It is a single piece of glass that breaks into sharp shards when hit with force. Float glass can, however, undergo a lot of chemical processes to be strengthened. It can be used in single-pane and even double-pane windows once it's been enhanced.

The cost factor is a significant consideration, as it tends to be more expensive than standard glass options.

As the most common type of affordable glass, float glass will often be used for low-cost windows and smaller display cabinet-style doors, as well as being the base material for almost every other application.

Annealed Glass -- This is the most commonly used glass type today and is used in most home windows. It is manufactured using the float method

Toughened is around 5 times stronger than laminated. It, therefore, needs to be hit a lot harder for the glass to break. When toughened is hit with enough force, it will break up into lots of small, blunt pieces rather than long sharp shards.

Areas we cover

1 hour service   24 hr boarding service   Cat & dog flaps fitted   Cat flaps   DGU   Double glazed units   Emergency glass repair   Emergency glazing   Get in touch   Glass cut to size   Glass manifestation   Glass samples   Glazing home   Greenhouse Glass   How To Measure A Double Glazed Unit   Jobs   Laminated safety glass   Mirror glass   Quote   Replacement window glass   Schools   Services   Shop front   Shower screen   Table tops   Toughened safety glass   What glass should I Have
Services   Emergency Glazier   Emergency Glass   Emergency glaziers near me   Emergency Glazing   Glass   Emergency Boarding   Window Repair   Replacement Double Glazing   Misted Double Glazing   Mirrors   Commercial Glazing   Shop Fronts   Glaziers   Double glazed windows   Glass Supply   Fire Rated Glass   Commercial Glaziers   Safety Glass   Glazier   Laminated safety glass double glazed units   Shower Glass   Boarding Up   Bespoke table top glass   Double Glazing Units   Misted Double Glazed Units   Toughened Glass   patterned double glazed units   Door Glass   Table Tops toughened glass   Double Glazed Units   toughned safety glass double glazed units   window glass   Double Glazing   Glaziers Near Me   Double Glazing   Cat Flaps   Glazing   Supply & Fit double glazed units   Glass Repair   Double Glazed   Table Top Glass   Georgian Wire Cast cut to size   Shopfront Glass
Postcodes   CT15   CT19   CT3   CT7   CT21   CT8   CT18   CT10   CT2   CT17   CT12   CT5   CT6   CT20   CT11   CT1   CT9   CT13   CT16   CT14   CT4
Towns   Calcott   Ripple   Crundale   Knowlton   Shepherdswell or Sibertswold   East Studdal   Littlebourne   West Hythe   Seasalter   East Langdon   Bladbean   East Stourmouth   Swingfield Minnis   Pean Hill   Selstead   Kingsdown   Acol   Ramsgate   Worth   Beltinge   Sutton   Manston   Breach   Hythe   Elmstone   Barham   Lyminge   West Cliffe   Lower Hardres   Newbarn   Thanington   Hoaden   Great Mongeham   Hales Place   Herne Bay   Whitfield   Cliftonville   Monkton   Tilmanstone   Sandgate   Birchington   Ash,Canterbury   Hersden   Chartham Hatch   Elham   Reculver   Paddlesworth   Hillborough   Eastry   St Peter's   Bramling   Broadoak   Alkham   Ashley   Ickham   Newington   Drellingore   Court-at-Street   Broomfield   Ham   Goodnestone   St Nicholas at Wade   Etchinghill   Broadstairs   Harbledown   Yorkletts   Northbourne   Buckland   Sholden   Rough Common   Herne   Densole   Westgate on Sea   Grove   Maxton   Adisham   Folkestone   Cheriton   Temple Ewell   Godmersham   Stonar Cut   Kingsgate   Nackington   Postling   Honey Hill   Farthingloe   Deal   Herne Common   Bishopsbourne   Gore Street   Hoath   Cliffs End   Hacklinge   Lympne   Coldred   Westbere   Molash   Bekesbourne   Beachborough   Canterbury   Woodnesborough   Bridge   Margate   Sturry   Whitstable   Capel le Ferne   Bossingham   Chestfield   Lydden   Betteshanger   Aylesham   Barfreston   Kingston   Chilham   Marshborough   Walmer   Dover   Easole Street   West End   Highstead   Finglesham   Ewell Minnis   Denton   Cop Street   Acrise Place   Sarre   Clapham Hill   Nonington   Chartham   Hunters Forstal   Fordwich   St Margaret's at Cliffe   Old Wives Lees   Hawkinge   Ringwould   Guston   Boyden Gate   Tyler Hill   Minster   Derringstone   Saltwood   Great Stonar   Sandwich   Chislet   Blean   Swalecliffe   Elvington   Eythorne   Chillenden
Counties   Kent
© 2026 canterburyglassandglazing.co.uk
Chat on WhatsApp