Proprietary perpend ventilators are available. Design should be in accordance with relevant Building Regulations and other statutory requirements. A high performance, multi-coat render system, incorporating glassfibre meshcloth, Click Compare to help you choose the right product for your project, if you need further assistance please email technical@netweber.co.uk. ... 3.13 Timber Frame – Separating wall (junction with external wall) 3.14 Timber Frame – Timber … Service outlets should not impair the fire resistance of floors and walls. The cavity should be vented to allow some limited, but not necessarily through, movement of air. Wall panels should be securely fixed together and fixed to floor and roof framing where appropriate. Dwellings with a timber frame superstructure require certification indicating that the design has been checked by an NHBC timber frame certifier. Copies of the fixing schedule should be given to the person doing the job. The drawing below shows a typical standard wall frame. The House Construction-The Frame post explains the background to frame construction. the timber frame, including any roof construction supported by the timber frame. Fix suitable sheathing board spaced off to create drained/ventilated cavity and finish with weberend MT. Design that follows the guidance below will be acceptable for external walls of timber framed dwellings, substantially timber framed dwellings and wall panels. This diagram shows a masonry external wall tied back to a timber frame structure using cavity wall ties. The design should detail the position and materials for cavity barriers in accordance with relevant Building Regulations. Timber framing should be treated in accordance with the guidance in Chapter 2.3 'Timber preservation (natural solid timber)', to which reference should be made. Even treated timber needs to be kept in a dry environment. Details on Plan 1. Additional studs may be required at openings for fixing wall ties where masonry cladding is used. Finish with weberend MT system with choice of finishes. Wall panels should be adequately fixed to the sole plate which in turn should be anchored to the substructure to resist all the lateral and vertical forces acting at these junctions. The extent of the differential movement increases with the number of storeys. This Chapter applies to timber framed walls up to seven storeys high. Building with timber framed construction can offer a number of advantages and benefits over building with a more traditional form of construction… This Chapter applies to timber framed walls up to seven storeys high. Multiple studs should be included to support multiple joists and other point loads unless otherwise specified by the designer. Minimum timber size will be 95mm x 35mm although this may increase for the following reasons: ... Normal spacing is at 450mm centers for external walls and 600mm for internal walls … A lintel and cripple studs should be provided to any opening in load-bearing panels except when the opening does not affect the stud spacing or where the supported loads are carried by a rim beam or perimeter joist. However, although timber is treated, it's vulnerable to rot and needs to be kept in a warm, dry environment. Interstitial condensation may form within the structure when insulation is not placed in the correct position. Wall insulation should be of a type which 'breathes' eg, mineral wool (rock or glass). In areas of Very Severe exposure to wind driven rain (as defined in Appendix 6.1-A) a high performance breather membrane should be used (unless the alternatives given in Clause D4(c) below are adopted). Dpcs should be installed below the sole plates of all ground floor walls, including internal partitions, to protect timber from rising damp and residual construction moisture. They are however, readily available from our technical team. Timber frame methods of building offer many benefits in the way of fast-track and off-site construction. Timber constructions often rely on a vapour barrier on the warm internal face. See Appendix 6.2-A. For guidance on the prevention of fire during construction see 'Fire prevention on construction sites' jointly published by the Construction Confederation and the Fire Protection Association (www.thefpa.co.uk). These openings can also provide drainage of the cavity. I-studs manufactured from timber of durability class 'moderately durable' or lower should be preservative treated in accordance with Chapter 2.3 'Timber preservation (natural solid timber)'. Partial fill cavity insulation, with a 50mm residual cavity, between it and any cladding may be needed but should be assessed in accordance with Technical Requirement R3 as an integral part of the wall system and installed in accordance with the assessment. This information should also be made available for reference on site so that work can be carried out satisfactorily in accordance with the design and specification. Individual studs should be not less than 37mm wide, at maximum 600mm centres, unless other adequate support is provided for wall boards and fixings. The design should take into account: Sheathing and its associated fixings should be structurally adequate to resist racking due to wind and other forces. These are usually nailed into the frame, and bedded into the mortar layer. Vapour control layers should be of 500 gauge (120 micron) polyethylene or vapour control plasterboard. Service mains should not pass through separating wall cavities. The anticipated amount of shrinkage of the timber frame is given in Appendix 6.2-C. Movement between the timber frame and other parts of the construction will occur at: Appendix 6.2-C provides guidance on the anticipated amount of shrinkage of the timber frame and where it will occur between other parts of the structure. Open brick perpends should be provided where necessary to prevent water build up in the cavity. Horizontal cavity barriers (except under eaves) should be protected with a dpc tray. These openings can also provide cavity venting. equivalent to open brick perpends every 1.2m, of a type which complies with BS EN 845 and fully permits differential movement between the timber frame and the cladding - see Clause D6(c) below, spaced at a maximum of 600mm horizontally and 450mm vertically, spaced at jambs of openings and at movement joints in masonry a maximum of 300mm vertically within 225mm of the masonry reveal or movement joint. Design shall meet the Technical Requirements, Design shall comply with all relevant statutory requirements, Loadbearing timber framed walls shall be designed to support and transfer loads to foundations safely and without undue movement, The design shall ensure that the structure is adequately protected from the effects of moisture, Timber and timber products shall either be naturally durable or where necessary be treated with preservative to give adequate resistance against decay and insect attack, Exterior cladding shall be compatible with the timber frame. The design should avoid narrow, inaccessible gaps between studs which are difficult to insulate. External corner 1.2. The fixing schedule should allow for every structural connection made on site including fixing details for framing, wall ties, breather membrane, sheathing and vapour control layers, and should show as appropriate: Where the wall design relies on plasterboard to take racking forces those walls should be clearly defined and the type and centres of the fixings stated. In Australia, platform framing is by far the most common. See Appendix 6.2-C. Masonry claddings should not be supported by the timber frame. The external wall construction is based on a structural timber frame comprising factory-produced timber … This Chapter gives guidance on meeting the Technical Requirements and recommendations for external walls of timber framed dwellings, substantially timber framed dwellings and wall panels (including relevant certification procedures). Or vapour control layers should be of 500 gauge ( 120 micron ) polyethylene or vapour control layers should protected. 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