Here at Parsons Joinery we ‘CE’ mark windows, external and patio door sets manufactured and glazed by us. The CE mark is an assurance that our products comply with required European standards and can, therefore, legally be placed on the market.
For each CE marked product there is a corresponding Declaration of Performance (DoP) document, which contains prescribed product data, that allows for clear comparisons to be made between similar products. This also contains information about thermal transmittance or U-values.
These DoP documents are available to download below or can be obtained from us upon request.