Pronto Joinery Ltd
Pronto Joinery Ltd

Glass and Glazing

We can supply the glass with your windows and doors. All our glass is either supply only or factory fitted. We do not fit glass on site.

All glazing to be in accordance with GGF requirements.

Applied Georgian Bars

Your joinery can be manufactured to take single or double glazing depending on your requirements or regulations. Double glazing has improved over recent years which now includes low e soft coat glass, Low Iron and slimlite double glazing for applications where glazing rebates are too small for standard double glazing. Gases including Argon and Krypton gases are added to increase the thermal efficiency of the units. 
All glazing rebates and beads must be painted before glazing. This includes the ends which are normally sealed with end grain sealer before painting. Use glazing packers to centralise the glass in the opening. When fixing glazing beads use a waterproof sealant on all mitres and end joints. Fill all pin holes and repaint. Following this method will stop the ingress of water into the joints and prevent any issues with paint and glass.
When using silicone make sure it is compatible with double glazing units. We recommend Silfix U9. Failure to do this will result in damage to the unit and loss of glass guarantee. Glass failure is noticeable by black runs inside the units.


Glazing can be done by various methods.


1 Generally for single glazing putty would be used with the option of glazing beads if required.


2 Glazing applied bar double glazed windows and doors with black security and bar tape as standard. White tape is available as a special order. And Silfix U9 Silicone.


3 Glazing double glazed windows and doors with black security tape and Silfix U9.


4 Glazing double glazed windows and doors with black or white Butyl Flexistrip tape and silicone. (THIS METHOD IS NOT USED WHERE THERE IS APPLIED BARS).


5 Slimlite / Slimline units must be glazed to manufacturers recommendations. Bedded in with Hodgson Silfix U9 silicone. And faced putty with Hodgson Colourglaze or Repair Care MP - See PDF download


6 Glazing with just silicone in certain circumstances.





(Please read the small print if using another manufacturer)




We hold a small stock of security glazing tape, georgian bar tape, butyl tape, silicone and packers. Subject to availability. Please order with your glass.

Applied glazing bars are used  to keep site lines to a minimum which is 22mm as standard.

Moulded timber is applied to both sides of the glass with a dummy bar grid inbetween the glass.

Glazing by 12mm x 2mm black security glazing, 22mm x 2mm georgian bar tape and Silfix U9 silicone.

Glazing bar options

Click on a photo for more information. 


UA-Sashlite-Glazing-Method 2018.pdf
Adobe Acrobat document [178.4 KB]
Pilkington Decorative Glass Range Novem[...]
Adobe Acrobat document [783.5 KB]
Hodgson B6 Glazing System
Adobe Acrobat document [486.7 KB]
Sealant Usage Calculator
Sealants Usage Calculator.pdf
Adobe Acrobat document [41.6 KB]

Diagram showing areas of glass which should be toughened in any building.

All queries:

Pronto Joinery Ltd
Dog Lane Horsford
Norwich NR10 3DH


Tel: 01603 890239

Fax: 01603 891677


Or contact us directly via our online form.



You can now have your joinery painted at our factory. Don't forget that we can also supply your glass. Come and see us or email for a free quotation.

We are members of the British Woodworking Federation. Click on photo for more information.

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