Guidance On The Usage And Specifying Of Secondary Glazing

Guidance On The Usage And Specifying Of Secondary Glazing

This steering supplies useful data on the ideas, disadvantages, supplies and strategies for upgrading the thermal performance of windows with the addition of secondary glazing.

Windows make a major contribution towards the character of historic buildings and each effort must be made to retain them. They may also reveal a good deal in regards to the history of a construction; changing architectural taste and magnificence, social hierarchy, building economics, craft expertise and industrial advances.

Older home windows may well be draughty as ultimately they distort as joints change into stressed. Although adequate ventilation is important in older buildings excessive air leakage by way of windows wastes warmth and is miserable for occupants.

Rigorously planned and put in secondary glazing permits the unique windows to be preserved unchanged, and the place crucial repaired, whilst reducing air leaks and carried out warmth losses. Consequently there isn't a damage to historic material as well as in most cases the set up is well reversible.

Latest study has revealed warmth losses by conduction and radiation via a window generally speaking could be decreased by over 60% by making use of secondary glazing with a low emissivity (low-E) hard coating going through the exterior. The research has also shown that further savings could be made if the magnetic secondary glazing glazing makes use of insulating frames or makes use of double or vacuum glazed units.

In addition to growing the thermal efficiency of windows, secondary glazing can have a number of additional further benefits together with being highly effective at limiting noise transmission.

For listed properties it is important to confer with the Conservation Officer on the native planning authority for steering ahead of the installation of secondary glazing. Listed Building Authorization could also be required in some cases.

What precisely is secondary glazing?

Secondary glazing is just nothing new. Within the 19th century some buildings had been constructed with internal secondary glazing designed as a part of the unique layout. Typically a second double hung sash window or strong panels with counterbalancing weights were fitted in the house beneath the window. Their perform was to chop down the warmth loss and provide some measure of sound insulation to the window aperture.

Secondary glazing is a completely impartial window system applied to the room side of pre-current windows. The original home windows remain in place and in their unique unaltered form.

Secondary glazing is available as open-able, removable or fixed units. The open-able panels might be both casements or sliding sashes. These types permit access to the exterior window for cleaning and the opening of both the secondary glazing and exterior windows for recent air. New secondary glazing is designed to be indifferent in warmer months when its thermal extra benefits are usually not necessary.