Average Labour Cost/Price to Fit/Replace a Pane of Glass

To clarify the following prices it is recommended that you read the article in the INFORMATION box below the PRICES…

(These prices are based on a tradesman’s rate of £150.00 per day and a labourer if required at £100.00 per day. This includes the cost of buying and collecting any materials, dumping any waste if necessary and any incidental materials they will need. The minimum price will usually be for a half day)

How Much Does It Cost To Fit a Pane of Glass?

cost to put fit a pane of glass

(Lets assume a glass size of about 18” x 30” - 450mm x 600mm)

Job 1
To turn up (twice), supply and replace a single glazed pane of glass and clean up
after himself………………

Job 2
To undertake the above, plus sort out a sash window’s counterweight problem by dismantling it and fitting a bit more lead……………….£200.00

Job 3
To replace a double glazed unit in a PVCu window……………..£115.00

If he needs to have a scaffold tower erected for any of the above, consider an additional……………………£175.00

For your must-see guide to Tradesmen's Rates please click on the map…


A Price Guide and Information Sheet on Fitting and Installing Glass


Whether it’s single or double glazed, he will have to make two trips. One to measure up, then a return trip to fit the glass.

Single glazing

If the window is a single glazed casement window, which is hinged at the side (not a Victorian style “sliding sash” window which slides up and down), then there’s not much of a problem. He needs to knock out all the remaining broken glass, “putty up”, fit the new glass, putty up the outside, bevel it all, cut off on the inside and clear off. He may need a ladder of course if it’s a bedroom window.

Simple? Well it would be if he was a girl! But he’s not, he’s a bloke and by definition therefore, not given to cleaning up after himself. This all leaves a mess and a dangerous mess at that if there are kids or animals about.

Who clears up the tiny bits of glass that are lying everywhere both inside and out? Who cleans up all the bits of horrible stinking putty off the carpet? Who cleans all his fingerprints off the glass without ruining his nice straight putty line? Sort this out when you call him in, if it’s going to be
him, make sure you are happy with the result before you fork out!

Then there’s the
painting. Putty takes a month to harden, if it’s painted before that, it never will! Don’t be hasty, you never get anywhere in this world if you are too hasty.

(If you are at least 50 odd years old, you will know where this line comes from, and by way of diversion, there’s a prize for the first sad “so and so” to email in and tell us what part of which day the gas man
did come to call)!

If the window is a
sliding sash type, there may be a problem with the thickness of the new pane of glass. The original pane could well be only 2mm thick, it is now illegal to glaze anything but a greenhouse with glass this thin. So, he will have to use 4mm glass (or possibly have a new 2mm sheet tempered, to create toughened glass). Thicker glass is twice as heavy and this will affect the balance of the sash. The result may be, that when slid open, it proceeds to slide back to the closed position again, as the counterweights which are concealed within the frame are now just a bit too light.

Solving this will mean either repositioning the timber mouldings to “pinch” the window as it is opened or removing some of the beads to expose the access hatches and adding a little bit more lead to the weights. Either way this will require a certain amount of repainting and considerably more filthy lucre!

Double Glazing

Double glazed “units” comprise two sheets of glass with an air gap in between. They are sealed all round but contrary to popular belief, the space between the two panes is not a vacuum.

If the frames are PVCu then the job requires no putty. He simply dismantles the internal bead to expose the glass, measures up, then puts it back together again until he returns with a new double glazed

, complete new windows have to meet quite stringent standards regarding “U” values and type of glass and the fitter has to be “FENSA” registered. (Like “Gas Safe" - formerly CORGI - for gas fitters). However, if you are replacing an existing unit because it’s “misted” or broken, none of these requirements are necessary, so if the windows are old with thin units, you are allowed to replace like for like. If the unit you are replacing is relatively new however, (post 2002), make sure the replacement unit meets all the latest regs.

If you are replacing a damaged
unit in a wooden framed window, don’t let him use standard linseed oil putty. Over time this will leach through the seal and discolour the space between the two panes of glass so make sure he uses the correct type.

A-Z of Job Pricing