Barley Studio adheres to the guidelines for the conservation and restoration of stained glass set out by the Council for the Care of Churches and the international Corpus Vitrearum Medii Aevi. These guidelines follow best practice relating to the care, reversible treatment, documenting and preservation all periods of historic glazing.

Keith Barley pioneered the system of Isothermal Glazing which preserves stained glass in as near museum conditions as can be achieved within the architectural setting. This system has been acknowledged as environmentally sound and has been adopted by the majority of stained glass conservators in Great Britain.

Barley Studio's team of expertly trained conservators has been responsible for the conservation and protection of windows throughout the UK.

Examples  of Barley Studio's protective glazing can be seen in :

York , Southwell  and Howden Minster and the cathedrals of  Durham, Lichfield, Ely and Chester; the houses and halls of Longleat, Blicking, Chastleton and Fountains; and the churches of Stanford-on-Avon, St. Neot (Cornwall), and St. Mary's (Fairford).

Keith Barley's 20-year restoration of St. Mary's in Fairford was the subject of a BBC2 documentary, "A Passion for Churches".

Keith Barley FMGP ACR is internationally renowned in the field of stained glass conservation. He founded Barley Studio in 1973 having completed an apprenticeship at York Minster with the York Glaziers' Trust.

Keith is a UKIC / ICON accredited conservator (ACR),  conservation adviser to the Corpus Vitrearum Medii Aevi (CVMA), a Liveryman of the Worshipful Company of Glaziers and Painters of Glass, a Fellow of the British Society of Master Glass Painters and the Winston Churchill Memorial Trust.

He is Master Glazier for Ely Cathedral and has acted as consultant to the Metropolitan Museum of Art in New York , the Museum of Fine Art, Boston and the Cathedral of Sienna in Italy. He has made many contributions to literature relating to the study and conservation of stained glass and has given many lectures and talks throughout the UK.

• The chapter on the Care and Maintenance of Stained Glass in "Treasures on Earth".
• An entry on conservation of stained glass for the Dictionary of Art.
• The chapter on the history of repair and conservation in "Life, Death and Art: Medieval Stained Glass of Fairford Parish Church".