Detailing
Good detailing is key in reducing/eliminating thermal bridging and air-tightness issues and improve the EPC rating for the building (as well as occupational usage required for DEC's). Here we outline detailing strategies for the major junction points, supported by thermal modelling and accompanied by autocad files.
Autocad dwg drawing files are available to download. They are contained in zip files for quicker download, and are all saved in Autocad 2000 format.
Key principles of good detailing
To ensure that the overall effect of detailing is positive, there are a few key principles which should be followed, such as:
- Use welted edges on flashings to maintain straight edges.
- All flashings should be fixed to a solid backing structure where possible.
- To ensure air-tightness, the use of fillers and mastics is important at all junctions.
- It is always important to specify details accurately and ensure that reputable, experienced contractors are used.
Overview of the detailing
The details included here have been drawn for generic built-up and composite panel cladding systems. In both cases, a typical trapezoidal profile has been used for illustrative purposes, but if using other profiles the same techniques and strategies can be adopted. Thermal modelling has been carried out on each of the details included here in accordance with BS EN ISO 10211-2:2001 and f and Ψ values are given. The isothermal diagrams show the weakest points of the details from a thermal viewpoint, with heat-flow being greatest where the coloured contours are closest together.
One of the critical areas in which detailing can provide neat, efficient solutions is around openings such as doors or windows. For this reason, typical details are given for head, jamb and cill. The specifics of the interface with the door or window will often depend on the proprietary system used, but the strategies given can readily be modified to accommodate a wide range of door and window systems.
Most of the details shown are finished off with flashings. This is an important area to consider when specifying the detailing. Flashings should always be specified in the same material as the cladding (e.g. Colorcoat HPS200® Ultra) to ensure that they do not weather at a faster rate than the cladding.
Key principles of good detailing
To ensure that the overall effect of detailing is positive, there are a few key principles which should be followed, such as:
- Use welted edges on flashings to maintain straight edges.
- All flashings should be fixed to a solid backing structure where possible.
- To ensure airtightness, the use of fillers and mastics is important at all junctions.
- It is always important to specify details accurately and ensure that reputable, experienced contractors are used.
The details included here have been drawn for generic built-up and composite panel cladding systems. In both cases, a typical trapezoidal profile has been used for illustrative purposes, but if using other profiles the same techniques and strategies can be adopted. Thermal modelling has been carried out on each of the details included here in accordance with BS EN ISO 10211-2:2001 and f and Ψ values are given. The isothermal diagrams show the weakest points of the details from a thermal viewpoint, with heat-flow being greatest where the coloured contours are closest together.
One of the critical areas in which detailing can provide neat, efficient solutions is around openings such as doors or windows. For this reason, typical details are given for head, jamb and cill. The specifics of the interface with the door or window will often depend on the proprietary system used, but the strategies given can readily be modified to accommodate a wide range of door and window systems.
Most of the details shown are finished off with flashings. This is an important area to consider when specifying the detailing. Flashings should always be specified in the same material as the cladding (e.g. Colorcoat HPS200® Ultra) to ensure that they do not weather at a faster rate than the cladding.
