Much of the guide contains approved construction details of Ward's roofing systems, including the ridge detail of its IP1000 roof system (see diagram, above). This shows how specifiers must use air seals and extra insulation to ensure the roof is airtight. Ward's sister company Kingspan Insulation has also published new approved details and SpeedDeck has a preliminary set of details available for specifiers.
The brochure has a section on determining adequate daylight hours, which the approved Part L document does not. From data in the brochure, specifiers can find out what area of rooflights is required to achieve desirable levels of daylight in factories, storage buildings and recreational buildings. The document also discusses thermal bridging, solar overheating and carries typical designs of in-plane rooflights that achieve U-values laid out in Part L.
Isowool Frame Batt HP fits between rafters and, depending on overall roof construction, may need just a single thickness of standard Gyproc wallboard to complete the ceiling. It is available in five standard thicknesses and is designed for use in vertical, horizontal and sloping details in frame structures.
In response to the new air-leakage requirements for industrial buildings of more than 1000 m2, Ejot Ecofast has added Polyband air and moisture barrier tape to its range of roof-fastening products. The company says the tape is an effective way of sealing the metal lining layer at joints and at all junctions and openings.