Taking a look internally you will also notice that the double glazed unit is hidden. Once the double glazing process is completed we will then refit the sash with the draught proofing system.
The housing committee at this block were very pleased with the result and will be suggesting this upgrade to all properties in the near future. Typically the largest unit we can install in an original existing sash window is 16mm in depth.
We use Argon cavity filled, Low E, double glazed units. A picture is going to help understand the unit much more clearly:. This unit is of exceptional quality and has not been bettered by Pilkington in around 8 years.
In the event your sashes are thick enough to carry this unit the value for money is incredible. Thinner sashes may require a double glazed unit as slim as 4mm Low E — 4mm Air Gap Argon Filled — 4mm Clear Float 4mm-4mm-4mm , which is not as effective for sound proofing or heat retention as a larger unit 4mm-8mm-4mm , however that said, a normal person will not be able to tell the difference in noise or heating between the two.
If we were to use a fancy dB meter for volume then, the 4mm-4mm-4mm would not be as technically effective as the larger unit 4mm-8mm-4mm , and although the difference would be noted on a U-Value meter for sure — the real heat loss would be unnoticeable on your gas bill.
Double glazing is double glazing after all. This depth will allow a 4mm-6mm-4mm or 4mm-8mm-4mm double glazed unit. To install the double glazed unit neatly, we need to make the sash rebate deeper to hold the glass properly. Because we do not rebate the internal decorative profile, we do not disturb the mortice and tenon and therefore the structure of the sash remains good.
By reducing the external glazing bead to a minimum depth we can minimise the impact structurally on the sash. The end result of double glazing the original existing sash windows is exactly the same as manufacturing sashes of equal depth, only with considerable saving your end and the luxury of retaining your original joinery.
Here is a look at the cross section of the original sash:. To allow for the double glazed unit we must rebate the glazing profile more deeply using a specialised router cutter on a work bench.
We then install the double glazed unit into the deeper rebate and rebuild the window with a draught proofing system. Here is a look at the sash close up after being installed.
It clearly needs a little tidying decoration wise but certainly no worse for wear. To have any idea the sash window is double glazed we need to look inside the sash to see the white space edge of the double glazed unit. Looking at the sash window straight on you would not know this sash window has been double glazed. Pictured below is a 40mm sash with a Argon filled unit. Similarly this technique can be applied to a more traditional Lambs Tongue profile.
Some might argue the finish looks better but please feel free to take a look at the image below and decide for yourself. Please note that this sash window has not been decorated as the client wished to decorate the sashes themselves.
This represents an excellent saving if you are DIY capable.. We will happily spend some time going through with you on the best technique to do so. I have also written a DIY sash window painting article to help our clients that wish to make this saving.
Replacement double glazed sashes making use of the original frame is the second most best solution in terms of cost, and being sympathetic to your period property. We will measure sashes and take note of the original profiles as well as external horns. We will then manufacture wooden double glazed sash windows to match the originals. The service is almost identical to double glazing original existing sash windows with the exception we supply a new sash instead of making use of the original joinery.
There are some added benefits of replacement to note. We can tinker with profile sizes and this allows a much larger sealed unit to be installed. If we were to manufacture a standard 22mm they would of looked chunky and unattractive. The durability really depends on how well you maintain your windows.
If a sash window is well maintained and looked after, it could easily last in excess of 25 years. Our Sash Windows are made of the highest quality materials that are designed to last and we are happy to advise on the correct maintenance procedures. In terms of visual appearance, there will be very little change with the new Sliding Sash Windows — this is unless you opt for a different look! The frames of your windows will be the same thickness as they were original although there will be small differences in the molding on the outside and the inside bead.
We will ensure that your new purchase is the perfect fit for your home, retaining the features and designs that make your windows double glazed beautiful. But if you look for a new sash window with secondary glazing we recommend replacing the existing sash in order to obtain a better performance and lasting durability.
Double glazing itself is known for being energy efficient and minimize heat loss a but the overall energy efficiency rating of your home will also be dependent upon a number of factors including wall and loft insulation, the installed heating systems, and the roofing material.
The windows, however, are a key factor in a house's overall energy cost-effectiveness rating, as they keep the cold and the wind outside as well as they are draught proofing, thus offering incredible performance.
Installing windows sash could help you save on your energy and heating bills. Double glazed sash windows will also help the environment as you will have less need for heating systems when you have double glazing, so these new windows will reduce your energy consumption, due to their overall performance. Reduces Energy Usage.
These sash windows are well known for being highly energy-efficient because they seal very well due to their double-glazed.
The sash window presses directly against all four sides of the frame of the window, forming an airtight seal that prevents air and cold spots from entering your house, providing incredible efficiency and guaranteeing draught-proofing. Reduces Condensation. Double glazed windows limit air intrusion into your home and due to their incredible performance reduces condensation.
Reduces Noise. Since the glass of this type of window has two glazed units, noise reduction is just one of the many advantages of secondary glazing.
Increases Security. All of our sliding sash windows were proved to resist physical attack by a burglar by being sufficiently robust. Moreover, the glazed units are harder to break, thus improving the security. Improves kerb appeal to enhance property value. Nowadays, more and more people are looking for inspiration in the past, and the sliding sash windows represent the perfect choice as it adds extra beauty and value to the house.
How much does a double glazed sash window cost? The only difference being that we manufactured and installed them with a double glazed unit rather than just single pane. It was an excellent opportunity to take advantage of the fact that the windows need replacing and upgrade them at the same time, this was quite similar our our double glazed sash install in North London , except that the original sashes were in place and the customer merely wished to upgrade to double glazing rather than the nasty aluminium inserts.
This is definitely added value for money, not to forget the home benefits from a far more comfortable ambience as well now. The first stage of having new double glazed sash windows installed is a site visit and quote. We will always pop round and take a good look at your windows prior to any confirmation of costs when double glazing is concerned.
Once one of our carpenters makes a site inspection and satisfied that we can work with the original frames, we will then email you an entire quote that is it a fixed price or would have options for worst case scenarios if we are unable to access or see the sill. It could even be an entire sill section needs replacing. Once the quotes been accepted and deposit paid, we will pop round and take detailed measures of the windows.
At this point we will remove some of the trims to give you a more accurate idea of any of the costs that might be involved. We manufacture all our windows in house and custom hand make our windows, in our own workshop. On the day that we install your double glazed sash windows, it is highly appreciated if personal belongings have been removed from the local vicinity of the windows, especially electrical equipment. This helps us to concentrate on the install and make sure that we give you the right job.
Our timber window draught proofing and overhaul service will not only help remove the cold draughts from your home, but we can also make minor repairs to any damaged timber or glazing, and fit new ironmongery and locks on your timber windows.
At The Sash Window Workshop, we are specialists in repairing and replacing sliding sash windows in a range of period properties and listed buildings, including Georgian, Edwardian and Victorian homes. To obtain a free, no obligation quotation, contact a member of our team on: Tuesday 28 June Replacing Single Glazed Windows with Double Glazed Windows A lot of period properties will suffer from cold rooms alongside high heating bills.
Installing Secondary Glazing If you live in a listed property, you may not be allowed to replace your single glazed windows with double glazing.
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