The French region of Alsace is famous for its traditional half-timbered houses. But this centuries-old heritage is threatened by the passage of time and urban development. Every year, 400 of these remarkable old houses are demolished. But a few locals are trying to safeguard their heritage. One young couple have embarked on a project to renovate their old house, using ancestral techniques. Meanwhile, a company near Strasbourg specialises in dismantling the half-timbering of abandoned houses, renovating them and reusing them on new structures. We take a closer look.