We are a fast reliable 24-hour family run company all glazing repairs are dealt with, quickly and efficiently

Frequently asked questions

What is the average time to arrive in an emergency?

In an emergency, we will be there in 30-60 minutes to resolve your problem swiftly.

Do You Provide Hinge Replacement Services?

Yes, we can provide hinge replacement services, we carry a large renge of window hinge in our vans. Our glaziers can replace your window hinge in first visit so you can save your time and money without any compromise in quality and security.

What is double glazing?

Double-glazed doors and windows are made up of two sealed sheets of glass with an insulating void between them. This gap is either in the form of a vacuum, or more commonly filled with a heavy inert gas such as argon. Together, the panes of glass and the void between them are very effective at preventing heat loss. In fact the U-value for a new double glazed window can be as low as 1.7, while a single glazed window in comparison has a u-value closer to 5. However, over time the effectiveness of the double-glazing can wane, especially if the seal goes around one of the panes of glass, allowing air to replace either the vacuum or the inert gas between the panes. The most common side effect of a seal going is that the window will fog up, as water vapour condenses on the inside surface of the window. If you notice your windows have become foggy, misty or steamy when you try to look through them, it means that the seals have started to fail

Why have my double glazing seals become damaged?

This can happen due to a number of reasons, however the most common tends to be general wear and tear as the double-glazing unit ages. Continuous changes in temperature cause fluctuations in the size of the glazed unit, since they expand in warmth and contract in the cold, and over time this can loosen and damage the seals. Particularly strong cleaning products can also sometimes eat away at the seal, so even though we all like being able to see through really clean windows, it is wise to make sure the cleaning product you are using is not chemically abrasive. Other reasons for your double-glazing unit failing include faulty installations or faulty production methods. However on the whole these should be covered by your window installer. It is therefore key to make sure you keep your FENSA certificate and a receipt of any work carried out. As the perimeter seal goes, moisture will start to enter the double-glazing unit. Normally there is a silica strip within the void that absorbs small amounts of moisture and separates the glazing units; however as soon as this becomes saturated the condensation rapidly increases, leading to it misting up the entire unit.

What is the average time to arrive in an emergency?

In an emergency, we will be there in 30-60 minutes to resolve your problem swiftly.

Is it possible to repair double-glazed units that have mist or condensation formed on the inside?

Double-glazed unit is not repairable from the inside. Once condensation forms, your only option is to get the old unit replaced. It usually takes around 4-7 working days to deliver your new double-glazed unit.

Can you cut holes in double-glazed units?

Cutting holes in existing double-glazed units break their seal. So, if you need a hole in a double-glazed unit, you would have to order a new one. It’s not possible to cut holes in existing ones.

Are broken handles or hinges of old plastic or aluminium windows repairable?

Yes, we have various types and colours in our in-stock hinges and handles, and most of the time, they are replaceable.

Can you fit my plastic or aluminium windows with fire escape hinges?

In most cases, it’s possible to replace existing standard hinges with fire escape hinges, or easy access hinges. Swift Glazing has multiple types available in stock.

Does house insurance cover broken windows too?

Yes, usually your windows come under your household buildings insurance. In case of a broken double-glazed unit, your insurance will call us for making the area secure for which, we usually use temporary fixes, such as covering the broken glass with a safety film, fitting a board temporarily, or a replacing your broken unit with a temporary glass pane. You can then order a new double-glazed unit, which will take 4-7 working days

Do your double-glazed glass windows come with a guarantee?

Yes, all the double-glazed glass windows fitted by Swift Glazing have a 5 years manufacturer’s guarantee.

Do you also deal with mirrors (supplying, fitting)?

Yes, our stock includes 4mm and 6mm mirrors, and we also provide quick mirror fitting service where we cut mirrors on-site and use specialist equipment to fix the sharp edges before fitting. Through this process, your mirrors can be fitted on the same day. For further protection, we will also add a safety film on the back of the mirror. However, if you want extra work done on the edges (polishing, bevelling, and drilling holes), then we may process the request, and it may take 5-7 working days

Where do we need safety glass?

It is required by law to have safety glass fitted in areas such as shops, schools, in roofs and public places, in and around doors and below waist level, etc. In other words, in all the “critical areas.” If you already have a pane of glass, you can have safety film added to it to make the glazed area safer.



City of London




Tower Hamlets





















Waltham Forest


Kensington and Chelsea


Hammersmith and Fulham