Technical Extra Issue 22 - April 2017. Our technical downloads library provides you with all your requirements for your next project, from our comprehensive datasheets to our thorough range of standard details. It is supplied in 20m length rolls. Figure 14 (Threshold levels – relative to decks) addresses threshold levels rather than floor levels as being critical for weathertightness. This website makes use of cookies to enhance … Each module also offers members of professional institutions an opportunity to earn between 30 and 90 minutes of credits towards their annual CPD requirement. Plenty of you guys must have level thresholds, so is you wall OK? At the accessible entrance, the landing will be less than 150mm from the dpc. A level external landing (maximum gradient 1:60 and/or maximum crossfall 1:40 for effective drainage) should be provided at all main entrances*. Visqueen Zedex CPT High Performance Damp Proof Course (DPC) is a black, flexible 0.8mm co-polymer thermoplastic (CPT) damp proof course and cavity tray system. LABC Registered Construction Details are available at no cost to customers of the local authority building control network. RESISTANCE TO FIRE SPREAD. For example a standard a upvc, composite, or french door would have a upvc threshold and this would typically be a step of around 70mm. Comments. How to take this module. Visqueen are the market leaders in the manufacture, design and supply of structural waterproofing and gas protection systems. 4.1.6 Detailed Investigation (sites where hazards are identified or suspected) 4.1.7 Managing the risks (sites where hazards are found) ... if excavated below the level of the surrounding ground. Other acceptable solutions are described in ‘Accessible thresholds in new housing – Guidance for house builders and developers, The Stationery Office Ltd. 1999. The channel collects water that has managed to by-pass the rubber blade seals and, through pre-drilled weep holes, this drains to the outside of the building, ensuring a high level of performance. The NHBC provides insurance on buildings that may have podiums, balconies and/or terraces. External Wall 1.1. 4.1.6 Detailed Investigation (sites where hazards are identified or suspected) 4.1.7 Managing the risks (sites where hazards are found) 4.1.8 Unforeseen hazards; 4.1.9 Documentation and verification; 4.1.10 Guidance for investigations; 4.1.11 Further information; 4.2 Building near trees. NHBC inspection staff have noted, and are concerned, that the well-established best practice of the finished ground level being 150mm below the dpc is being ignored on an increasing number of sites. ^Back to top . Clearly the requirement for level thresholds means that cant be achieved Ive been looking at the various detail drawings for the thresholds, but whatever system is used, does the wall ABOVE the DPC not get wet? ACO Threshold Drain comes complete with either a silver or black aluminium Heelguard grating suitable for pedestrian traffic. Climatic conditions, especially wind speed, together with the required level of window performance (eg in relation to air tightness), may govern the size of glass panes and opening lights in exposed locations. finished ground level DPM/radon barrier by main contractor V.231i.DGU.01.A.C.001 1:2 approx. NHBC Standards 2021 come into force for new homes where the foundations are started on or after 1 January 2021. I thought the 2 brick idea was to counteract rain bouncing / splashing the wall? Further research is also needed on how thresholds should take account of a changing outdoor climate, human adaptation and the effect of minimum night-time temperatures and diurnal variation. The DIfference is Visqueen. The NHBC Technical Extra (issue 04-2011) draws attention for the need to maintain exterior wall dpc levels 150mm above ground level. DOWNLOAD PDF. View NHBC Standards 2021 . This is simply the bottom piece of a four sided frame, so the frame would be exactly the same on the bottom as it is on the top and sides. 6.7 - D4. Ground level and dpc. Technical Extra Issue 23 - January 2018. 9.1 - D6. Threshold Drain Slimline domestic level threshold door drainage. SECURITY. The minimum dimensions for this at an entrance to an individual dwelling should be 1200mm x 1200mm. Where proprietary floor systems are used, adequate moisture-resistant membranes should be installed in accordance with the manufacturer’s recommendations. LABC Assured Compliance Raise industry confidence in your product as well as the profile of your company with our one-off certification process. Check out what’s new and see the new version of NHBC Standards Plus which contains supplementary guidance and 3D visuals to help you interpret and apply the Standards. NHBC Technical Extra – Level Thresholds and DPC Integration. UBM’s CPD distance-learning programme is open to anyone seeking to develop their knowledge and skills. LABC Assured. [] Related articles on Designing Buildings Wik Details on Plan 1. NHBC NHBC Key Points. Technical Manual Section 11.1.6: Example construction details for level thresholds to dwellings. If you are building a new aperture for your bifolding doors, this is something that can be established with your builder. To develop their knowledge and skills supplementary guidance for the need to maintain exterior wall dpc levels above... 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