Frequently Asked Questions
1. WHY SHOULD I BUY INTERNALLY GLAZED WINDOWS AND NOT EXTERNALLY GLAZED?
3. WHAT IS THE BEST OPTION FOR SAFETY GLASS – TOUGHENED OR LAMINATED?
4. AM I REQUIRED BY LAW TO FIT TOUGHENED OR SAFETY GLASS?
7. ARE MY NEW FRAMES MAINTENANCE FREE?
8. WILL I NEED PLANNING PERMISSION?
9. DO I NEED BUILDING REGULATIONS FOR INSTALLING DOORS AND WINDOWS?
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1. Why should I buy internally glazed windows and not externally glazed?
Most companies and installers favour internally beaded systems simply because the glazing beads are on the inside of the property, where as an externally glazed window the glazing beads are on the outside. Having an internally glazed window eliminates the possibility of an intruder forcing the beads to gain entry. From a health and saftey point of view an internally glazed window is far superior as the glazing is done from the inside, not from a ladder or scaffold. (Top)
2. I live in an old style terrace house with box sashes that need replacing. Shall I 'fit into box' or remove the whole box?
Every installation is unique and the majority of cases we would recommend the complete removal of the box. However, on some instances if the original box is 'sound' and cost is a factor then installing within the existing box sash should be acceptable. (Top)
3. What is the best option for safety glass - toughened or laminated?
Both toughened and laminated glass are forms of safety glass but vary in amounts of cost and performance. People assume toughened glass is some kind of extra strong glass but we like to think of it as 'break safely glass'. Yes, toughened glass is quite difficult to break but not impossible. When it does break it will break into very small sections, which should eliminate scracthes or minor cuts and will not pose the dangers created by large shards when standard float glass breaks. Toughened glass is the most widely used and comes in thickness of 4mm. Laminated glass is the more expensive option and at 6.4mm it's also thicker and offer's better insulation values. However, this thickness also means a heavier product, which in turn increase's the 'wear and tear' on your opening windows and doors. (Top)
4. Am I required by law to fit toughened or safety glass?
Yes. Toughened or laminated has to be installed in all doors or windows that are directly next to a door. Any glazing or part of that glazing, which is between the finished floor level and a height of 800mm above the floor level requires safety glass. (Top)
5. Tell me about Argon gas.
Argon gas improves the u value of a window or door and combined with low-e is an excellent addition in terms of thermal insulation. At OnTime Windows we can supply Argon gas glass units as an optional extra. (Top)
6. What is low e glass?
Low e stands for low emissivity. The double glazed unit has one of its inside faces lined with a special coating that lets heat and sunlight filter through but reflects any heat trying to escape back into the room. The benefits of low e glazing are: reduced heat loss and eliminates cold spots. Low e glass is available in normal float, toughened and laminated glass. (Top)
7. Are my new frames maintenance free?
Whilst pvcu frames are virtually maintenance free it should be noted that the hinges and mechanical parts such as locks will need regular lubrication. The frames will also benefit from an occasional 'wipe down'. Special pvcu frame cleaners are available from our trade counter. We do provide a "How to Care For Your Frames" guide.(Top)
8. Will I need Planning Permission?
In England and Wales you will not usually require planning permission, provided you do not exceed the permitted development limit for your property (which is usually 50-70 cubic metres, depending on where you live). Notable exceptions to the above are listed buildings and conservation areas. Please note that if your property has been extended in the past you will have used up some or perhaps all of your 'permitted development' area and may need permission. It's also worth noting that occasionally 'permitted development' rights may be withdrawn from a property and any extension however small needs planning. If in doubt, check with your local authority. (Top)
9. Do I need Building Regulations for installing doors and windows?
Yes. If you are installing yourself or not using a FENSA or CERTASS registered contractor then you will need to arrange building regulation approval yourself. We would recommend you contact your local building authority before any work has been carried out. A breakdown of the costs must be shown. Check with your local council for charges for installations. (Top)
10. What is FENSA?
Fensa stands for the fenestration self-assessment scheme. It has been set up by the Glass and Glazing Federation (GGF), and other industry bodies with government approval, in response to new building regulations. For more information visit www.fensa.co.uk. (Top)
