It is very important that all new timber windows meet certain standards of insulation or thermal performance.
These values are specific and insure that you are getting a product that meets a minimum set of energy efficiency standards. It is the timber windows manufacturers and the fitters joint responsibility to ensure your new windows meet or exceed these standards that have been set by the Government.
If you choose to use a sash window company that is not able to self certify then this is not nesersarily wrong but it will mean that you, as director of the works, will be taking on the sole responsibility to ensure the work meets the required values etc’
This could be quite difficult if you are not “in the trade” so to speak.
Basically in layman’s terms any replacement windows must ventilate your home the same as the old ones. It is best if they provide improved ventilation by use of trickle vents, however, as long as ventilation stays the same, it should be fine.
The glazed area should let in plenty of daylight. It must be an improvement or at least the same as the original installation.
Safety is an important issue with the new rules!
No matter what kind of glass is used in past timber windows, safety glass must be employed in certain situations. For instance, any glass that can be reached or contacted eight hundred millimetres from the floor has to be safety glass. This insures that you, your family, or visitors, are less likely to become injured from broken glass. For doors, the minimum is 1500 millimetres.
UK building regulations regarding timber window replacement also take emergency escape very seriously.
If your home currently has windows that provide an emergency escape, you cannot replace them with standard glass products. This rule is meant to save lives in the event of an emergency such as fires. Your windows can be made from wood or metal. UPVC is also acceptable. However, all products must meet minimum thermal performance standards.
We would always advise on wooden windows, but then again we may be a little bias! jokes aside, timber is most definitely best for longevity and it does not conduct heat/cold at anywhere near the amount that metal frames will.
Timber windows are also far better for the environment as trees are a natural product, cutting them down and replacing them actually helps the planet due to the natural process of trees effectively breathing in CO2 and exhaling pure oxygen! UPVC on the other hand is an oil based product and, simply put, just uses up yet more of our dwindling global resources. I dread to think of how much CO2 is pumped out each year manufacturing UPVC windows!
We ONLY use fully qualified surveyors NOT sales people. As a result of this long standing policy there are no commissions involved, this not only keeps our prices low but also guarantees that none of our products are miss sold and you will only ever get straight forward honest advice from a trusted and independent surveyor!