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Let’s Learn How To Measure For Replacement Windows

There is a time when it may become necessary to change out your current windows. Quite likely this need may come about from having windows that are damaged from consistent exposure to the elements. However, there are other times where this seems essential because of a need to change your homes aesthetics. There are many types of windows that may be used in the existing space. You may choose sliding windows, louvred windows, hooper windows, traditional French windows, double hung windows et al. In addition you may choose a variety of materials that may add durability and or a more traditional look to your windows.

The main materials you may use are inclusive of: aluminium, fibreglass, vinyl, wood and fibrex. While aluminium will be relatively affordable, it is best suited for warmer climates where heat loss is not a problem, vinyl is a better option if you reside in a colder climate as is wood except that wood windows need more maintenance in the form of periodic paintings. Fibreglass is an expensive option but still very durable and the best choice for colder climates. Fibrex is also a wonderful choice as it gives you the durability of wood combined with the lowered maintenance requirements of vinyl and superb energy efficiency. If the windows you will be installing are highly energy efficient you may be eligible for rebates from your electric provider. Determining these measurements yourself is not that hard to accomplish, however, you will need to maintain accuracy throughout to make sure your windows will fit.

Required Materials

Paper (to jot down each measurement)

Required Tools

Measuring Tape



Your windows will have to be measured for height width, level and square. If you are performing your measurements as a means of getting an estimate, then height and width dimensions are enough. To do this get your measuring tape and measure the two sides of your window’s length, (just in case there is a slight change) and also measure the mid section of your window. Then write down the three measurements, if they are exact, (which they should be, may only off by a centimetre at most), only one height measurement will be needed, if they are off then use the shortest height measurement for an approximation. Then take your measuring tape and measure the width of your window at being sure to maintain accuracy by placing the measuring tape from end to end of your window. Obtain some assistance if the windows are big or if you would like a second opinion. This type of measurement will be perfect for vinyl, aluminium and steel windows, but solely for estimate purposes as stated before.

It should be mentioned that you will need to write your measurements with the width measurement first, then the height the measurement in relation to the custom that most businesses will follow. If you do it the reverse way without labelling appropriately height and width measurements your newly created windows will not fit. If you are measuring for wooden windows, your correctness may be off by a couple centimetres and still fit because these windows may be adjusted to fit the section by sanding.


It is important that you measure the window sections acurately, especially if you are getting vinyl replacements that are entirely made to fit the measurements that you give the supplier. Aim to be exact and you will have very few problems.

Think about measuring your windows more than one time, do the same area no less than three times at separate periods to increase accuracy, try to make it accurate right down to the smallest marking on your measuring tape. Hence even if you get a decimal in your final measurement at least you will know your windows will fit.

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