Energy efficient windows

Window glass is a common artifact found on many historic archaeological sites. Until now, some researchers have believed that crown window glass was used exclusively during the colonial period and early postcolonial period Tunis ; Pepper ; Louis Berger and Assoc. Broad window glass had been assigned a terminus post quem of , eventually replacing crown window glass by around Louis Berger and Assoc. This paper will examine the production processes for both crown and broad window glass as well as the physical evidence for the use and production of broad window glass alongside crown window glass during the early colonial period. Download to read the full article text. Deldot Archaeology Series , No. Google Scholar.

Stained glass window

The Met Fifth Ave opens August The Met Cloisters opens September Your health is our top priority. The stained glass in this window was assembled by an English dealer early in the twentieth century from at least four different sources. Much of the glass comes from the area of Gloucestershire; additional figures from the apostles and saints series are now in the church of Saint Mary’s in Temple Guiting.

It is hoped that the use of chemical analysis to date historic window glass in this way will be used to What we need is a dating technique for window glass.

Energy efficient glazing covers both double and triple glazing. These are windows with two or more glass panes in a sealed unit. You can also improve the energy efficiency of your home by installing secondary glazing, or even by using heavy curtains. Having energy efficient windows could help to reduce your carbon footprint and your energy bills. Before replacing your windows, check with your local planning office if any of the following apply to your property:.

Most people have double- or triple-glazing fitted by a professional. Competent DIYers can fit some secondary glazing systems, but a professional should carry out removing old windows and installing new ones.

Window Glass Cutters League of America, Papers

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Around 30, small fragments of stained glass dating from between 12 In the modern lower Islip chapel window is placed a 16th century panel History and description of the windows of [St Margaret’s] by J.E. Sinclair,

Historic building window replacement presents a variety of challenges. Each design parameter affects the others. For example, historic requirements may mandate narrow sight lines to replicate original glazed wooden sashes. New insulating glass might impact the muntin profiles or change shadow or sight lines.

A custom finish that eliminates the need for repainting may require thermally separated aluminum framing with deep glazing pockets. Deteriorated building framing may require a custom window rather than an off-the-shelf product. The biggest concern with glazing replacement in an historic building of any kind is not knowing what might be uncovered during demolition. The owner, architect, and glazier cannot know the true condition of the wall until the old windows have been removed and demo is complete.

Often, the historic opening is out of square, either due to primitive early construction methods or building movement over time.

Historic Window Glass: The Use of Chemical Analysis to Date Manufacture

Windows have long been used in buildings for daylighting and ventilation. Many studies have even shown that health , comfort , and productivity are improved due to well-ventilated indoor environments and access to natural light. However, windows also represent a major source of unwanted heat loss, discomfort, and condensation problems. In recent years, windows have undergone a technological revolution. High-performance, energy-efficient window and glazing systems are now available that can dramatically cut energy consumption and pollution sources: they have lower heat loss, less air leakage, and warmer window surfaces that improve comfort and minimize condensation.

Analysing Medieval window glass with Micro-XRF. David Dungworth of Historic England used a Bruker M4 TORNADO micro-XRF to image Identifying the types of paints and pigments also helps to date the fragments.

Craig J Kennedy , K. Robin Murdoch, Susanna Kirk. Characterization of archaeological and in situ Scottish window glass. Robin; Kirk, Susanna. The elemental composition of the glass provides information regarding the materials used and, subsequently, an approximate range of dates of manufacture. The study showed that the production of window glass in Scotland from the 17th century onwards appears to closely parallel that in England.

It also demonstrated the potential of pXRF for in situ studies of window glass in historic buildings. The building in private ownership, Traquair House, had a range of glass types and ages, demonstrating a different maintenance and repair regime. This type of data can be useful in understanding historic buildings in the future, particularly if re-glazing is being considered.

Medieval and Post Medieval window glass in Scotland

Glass as an independent object mostly as beads dates back to about bc. It originated perhaps in Mesopotamia and was brought later to Egypt. Vessels of glass appeared about bc , during the reign of Thutmose III , a pharaoh of the 18th dynasty of Egypt. From Mesopotamia and Egypt, glassmaking using the basic soda-lime-silica composition traveled to Phoenicia, along the coast of present-day Lebanon.

From there the art spread to Cyprus, Greece, and, by the 9th century bc , the Italian peninsula.

Investigations by historical archaeologists (Walker ; Chance and Chance ;. Roenke Ball ; Moir ; Ison ; Rivers ) reveal that.

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. History Stack Exchange is a question and answer site for historians and history buffs. It only takes a minute to sign up. The question is pretty simple. I’m quite curious about since when we are lucky to have windows with glass in them.

And since when is there faint glass that isn’t perfectly see-through? Technically speaking ” flat glass ” was introduced by the Romans as glass for construction of window panes. These were produced as early as the first century CE, and is commonly found in Roman sites in Britain as well. Pieces as large as 30 by 40 inches have also been uncovered at Pompeii. Such early windows were usually quite small, of irregular thickness, and not clear or transparent. These flat panes may have been produced using one of several different processes.

One suggested method is ” cast glass “. This produced glass of uneven thickness, with one side having a polished or “glossy” surface and the other side a matt finish. Although the exact technique is lost, it is suggested that they were produced by pouring molten glass into a mold.

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Window glass is one of our most important sources of medieval imagery, but our understanding of its production is limited relative to other media such as wall-paintings and sculpture. Furthermore, it represents the majority of the glass material used in the medieval period in northwestern Europe. This project aims to determine.

Why is My Window Glass Wavy? historic house, Queen Anne, bungalow house. Before you invest in replacement windows, consider the unique.

The window is so large that the stained glass was re-installed in two stages. In , of the panels were replaced. Then, between August and September , restorationists worked on the remaining panels, returning them to the church between November and January Half of the window depicts the creation of the world from the Book of Genesis. The other half is a tells the story of the Book of Revelations and the events that presage the return of Christ and the end of the world.

It is also home to the five sister windows , which date to the mids. After World War I, that window was restored and was rededicated as a monument to the women of the British Empire who died while serving their country during the war, including Edith Cavell , a nurse who was executed in after helping more than Allied soldiers escape from German-occupied Belgium. It was restored in because of erosion.

These and the rest of the medieval windows throughout the cathedral will also received the UV protective glazing over the next 20 years. In the meantime, workers are beginning the task of carefully removing the massive amount of scaffolding used to work on the great east window. A celebration to mark the return of the piece is scheduled for May. Continue or Give a Gift. Privacy Terms of Use Sign up.

Understanding Different Types of Glass