Contemporary single-frame woodwork possess many merits. Nonetheless, its application in old buildings may encounter numerous obstacles. The latter include not only purely aesthetic issues but also technological problems. Conservators should possess thorough technical information in order to be able to formulate their recommendations in a precise manner or to justify their decisions. Commonly held views about contemporary PVC woodwork are often the outcome of conclusions drawn from evident errors committed during their assembly. The article discusses select technical problems of new window woodwork with particular emphasis on problems associated with the excessive tightness of contemporary single- frame windows.
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