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  How to Measure for your Double Glazing Units                                                                   


How to measure for Double Glazing Units



How to measure for Double Glazing Units in aluminium and pvc windows

The first method is for uPVC and Aluminium frames, the double glazed units are normally secured

by glazing beads. If your frames are glazed like this,

then:- ?this is how to do it?.



cavity wall construction

Take your measurements from the rebate edge to the rebate edge and deduct

10 mm. Do the same for the height and again deduct 10 mm.  Now you have to establish the thickness. You can either, remove the beads and physically measure the thickness or place a straight edge across the frame and measure the space between the straight edge and the glass. Do exactly the same on the other side of the frame. You then need to measure the overall thickness of your frame. You then add the first two measurements together and deduct from the frame thickness, the result should represent the thickness of your double glazed unit. Double glazed units come in even number thickness from 14mm to 28mm there is no in between sizes. It is easier to straight edge method is easier to do on the opening sash.


?The Reason for the 10mm deduction in the height & width? is:- it allows for manufacturing tolerances and for the minor expansion that may occur in hot weather, it also allows for minor deviations in brickwork and makes for easier fitting. If you find for any reason that your new frame is tight, you may plane down the frame up to the depth of the ribs, this will give you some tolerance and can get you out of trouble but is no substitute for careful measuring in the first place.


Take note of the plaster thickness inside, are there any tiles fitted to the reveals etc.  if you can?t see much of the existing timber frame and the surrounding internal structure is almost obscuring the frame then you may need to consider allowing for reducing the frame size. Sometimes the tiling or plasterwork is so close to obscuring the frame that you may have to request add-on frame extenders to both sides and sometimes top and bottom, especially if the internal cill has been built up.

This situation most commonly occurs in bathrooms & kitchens. If you need to order add-ons, just quote the overall window dimensions and state where you require the add-ons to go, we will automatically reduce the frame size to suit the add-ons.

Overcoming tiling and plaster problems when measuring

It is ?Particularly important? to check for plaster thickness for doors and Tilt & Turn windows, because the hinges are fitted close to the inside edge of the frame and if your plaster is anything other than the normal 15/20 mm thickness you need to take this into consideration to prevent hinge fouling.

Doors often have to have frame add-ons to ensure the door hinges are not fouled by the internal plasterwork or to clear decorative fitments such as skirting boards and dado rails.


?If in doubt?.. Do not hesitate to call us on 0161 486 6049 we are here to help?

Older properties and most terraced houses have there original frames fitted behind the outer skin of brickwork, this requires a different approach and you may decide to fit the frames between the outer brickwork and make good inside, in this case take the measurements as for ?Typical Cavity Wall Construction?.


Method 2

The second method in which your existing windows may have been fitted is behind the outer skin of

brickwork and this will often neccesitate a box sash replacement, this applies to all frames

that are fitted behind the outer skin of brickwork. If your property is of this type of

construction then:-      

?this is how to do it?.


Behind outer brickwork

Measuring from the outside, take three different width measurements of the outer brickwork from top middle and bottom of the existing brickwork opening. From the narrowest reading, add 10 mm. If measuring to fit frames in stonework that has irregular shapes, make suitable allowances so that any openers will pass any irregularity of the stonework.

?The Reason for adding the extra 10mm width to the frames? is that the frames are fitted from the inside and the extra width allows the frame to fit up behind the outer skin of brickwork.

You would not normally require external cills for this type of installation, the frames would sit onto the original stone cills, remember to state ?No Cills? when ordering.

If you are removing the original box sash windows, this type of installation is quite time consuming and  can be a very dirty job that involves considerable making good. The good bit is??????.. you will  save a small fortune by doing it yourself??..as window installation companies charge a hell of a lot for this type of work, a typical price from a self employed fitter would be between ?200 & ?250 per window for the fitting alone, heaven knows what a National Installation Company would charge,

These instructions also apply to doors, patio doors and French doors.





?If in doubt?.. Do not hesitate to call us on 0161 486 6049 we are here to help?


PVCu Windows XL Doors Glazing Units Technical Information Instruction Manuals Information

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Tilt and Turn

Secondary Glazing

Cottage Windows (Georgian windows)

Sliding Sash Windows

Caravan Windows

Economy Shed & Garage Windows

French Windows


Roof Lights

BiFold Doors

Composite Doors

French Doors

Residential uPVC Doors

Sliding Patio Doors

uPVC Doors

Double Glazed Units

Triple Glazed Units

Security Units

Acoustic Units

Reinforcement for uPVC Windows and Doors

How to control condensation on house Windows

How to get value for your money

FAQ - uPVC Windows, uPVC and composite doors

Save money by diy windows and doors

How to Measure for your uPVC windows

How to fit uPVC and Composite Doors and uPVC windows

How to fit uPVC Conservatories

How to fit double and triple glazed units

Liniar Window Installation Manual

BiFold doors installation Manual

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