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Offset ventilators for level access
5.16NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
If floor levels need to be nearer to the ground to provide level access, subfloor ventilation can be provided through offset (periscope) ventilators.
accessaccessibilitydrainageDoor thresholds in external walls - weather protection guidance
6.33NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Guidance on weather protection of accessible thresholds is given in – (a) BRE Good Building Guide 47 Level external thresholds: reducing moisture penetration and thermal bridging; and (b) The Statione
dwellingnon-domesticaccessaccessibilitymoistureBritish Standards Referenced in Technical Booklet C
Appendix Publications referred toNI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
British Standards (BS) BS EN 998-2: 2003 Specification for mortar for masonry. Masonry mortar. BS EN 13914-1:2005 Design, preparation and application of external rendering and internal plastering. Ext
drainagemoisturesite-planningaccessibility