https://www.pilkington.com/en-gb/uk/news-insights/blogConservatories, Doors, Replacement Conservatory Roofs, Rooflights, Windows, Householder, Trade. Blog Post. 04 February 2020. Daylighting and Part L. As expected, energy savings and carbon emissions reductions have dominated the discussions on the current Part L 2020 proposals, as well as debates about 'fabric first' vs renewable technologies. Read More . Tags: Thermal Insulation, Windows ...