A private consulting and research firm practicing preservation design, conditions assessments, materials science, and historic building documentation. Projects are in the northeastern United States

Strengthens existing fragile plaster in ceilings and walls in historic buildings.

Consulting engineers who specialise in the sensitive repair and conservation of historic buildings and structures. Portfolio includes projects throughout the United Kingdom.

Stained glass consultants advice on stained glass conservation issues.

A firm documenting and researching historical monuments in the Austrian Tyrol, as well as advising on and supervising restoration. Team, projects. In English, German and Italian.

Non-profit membership organization dedicated to education, networking and outreach for the traditional building trades and allied disciplines. Includes information on trade shows and events.