It is recommended that any sarking be classified as a Water Barrier in accordance with AS/NZS 4200.1, to provide protection against wind driven rain and water ingress. Homes are often missing out on much needed insulation when undergoing renovations or during construction, creating cold, draughty and uncomfortable spaces. Sorry, you need to enable JavaScript to visit this website. For further details, please review our. Ask your contractor for a guaranteed settled R value. Bushfire Roofing Systems Design Care must be taken to manage condensation risks consult the manufacturers technical information and installation guide to prevent pest entry, and ensure that all termite barriers remain fully visible. Tape up holes and the entire lengths of joins in reflective insulation using a high-quality tape with a warranty life corresponding to the insulation product lifespan. If a sarking material is perforated or considered a Non-Water Barrier in accordance with AS4200.1, it may not be able to provide weather protection. Make sure the ends of multicell and concertina foils are well sealed with tape or other material specified by the manufacturer, and ensure that corners of walls, ceilings and floors are properly insulated as these are areas where heat leaks most often occur. Thermal bridges are pathways for heat transfer through components of the floor, walls or roof. All insulation should be installed carefully following the product specifications, to minimise the risk of condensation or fire. This ensures that condensation does not present a risk to building occupants. Windows and doors can also be thermal bridges, particularly aluminium frames that are not thermally broken. The top of an opening need not be flashed where it is adequately protected by an eave of a width more than 3 times the height of the cladding above the opening (See Figure 3.5.4.5). Timber cladding must be installed as follows: Splayed timber weatherboards must be fixed in accordance with Figure 3.5.3.1 and with a lap not less than, 30 mm for hardwood, Cypress and treated pine; and, fixed in a horizontal, vertical or diagonal direction with the overlap and groove closely fitted, where provided; and, with tongue and groove profile, fixed tongue edge up, where they are fixed in a horizontal or diagonal direction; and. 3.5.4.2 covers the following types of timber cladding profiles: Table 3.5.4.1 applies to both machine and hand driven nails. The best type and location of insulation will depend on your local climate, and whether the insulation is mainly needed to keep heat out or in (or both). be fixed in accordance with Table 3.5.3.1 and Figure 3.5.3.1. Because it only works by radiation and non-emittance, contact with any other building element will reduce its insulative properties to zero. The R value of the insulation will vary according to design and climate zone. Insulate internal walls between the home and uninsulated spaces to the same standard as other external walls. Total R values for walls are expressed as a single figure, without up and down distinctions. Suspended slab with rigid foam board installed to the underside. Good insulation that works effectively for your home requires the selection of the correct product for your climate. Clause C1.9 (e) (vi) states that sarking-type materials, which do not exceed 1mm in thickness and have a Flammability Index not greater than 5, may be used where a non-combustible material is required in Type A and B construction. Fasteners must penetrate not less than 30 mm into timber frames and not less than two full screw threads through steel frames. A gap should be provided between the sarking and the parapet capping to help control condensation. Sheets not more than 9 mm thick must be fixed using 2.8 or 3.530 mm long galvanised clouts or flat head nails spaced at. Just like you, we believe in using high-quality building materials which are compliant, safe and cost-effective. Recommended for warmer climates where lower insulation values are used, Recommended for hot to humid climates where lower insulation values are used, Recommended for cooler climate where higher insulation values are used. Thermal modelling suggests that slab edges are likely to leak heat into and out of houses in all but Climate zone 1 and some sites near the northern extremity of Climate zone 2. overlap by not less than 50 mm in the direction of flow; and. The first step towards getting a good result from your insulation is to understand how your climate will affect the building. This means a different approach to pitched roofs is needed. AS 4040.1-1992 Rec:2016. The method of flashing must be suitable for the framing and cladding used and any reveal for the window or door system or any architrave or finishing trims that may be installed. View the datasheet for Thermoseal Firespec here. View the datasheet for Enviroseal RW here. Suitable bulk insulation may include polyester or fibreglass batts, or rigid foam boards such as PIR or XPS boards. The orientation of the foil needs careful consideration to ensure it is most effective and does not add to condensation risk. Methods of testing sheet roof and wall cladding, Method 2: Resistance to wind pressures for non-cyclone regions. Suitable and climate appropriate materials include rigid foam boards, bulk batts between battens, and foil-faced foam boards with an air gap of at least 15mm with the foil facing inwards (these products could be vapour impermeable or vapour permeable). However, it is essential that the insulation R value is climate appropriate to prevent the slab temperature from falling below the dew point, or else condensation will form on the ceiling inside. Notes to Wall sarking is a flexible, pliable membrane, which acts as a wall wrap to help protect the building against the elements and provide greater insulation. Cavity fill insulation is mainly used to insulate existing cavity brick walls. Download the Enviroseal Wall Wrap brochure for more information. As of the 1st of May 2019, all Construction Certificates approved in accordance with the NCC 2019, now have new exclusions for sarking-type materials. The use of non-combustible components in high-rise external facades is critical in preventing the vertical spread of fire, this includes insulation. There must be an appropriately specified vapour-permeable moisture barrier (sarking) below the roof to carry away any condensation. Original authors: Max Mosher, Caitlin McGee, Updated: Max Mosher 2013, Dick Clarke 2020, Find out more about the new edition and order your copy, Typical heat losses and gains without insulation in a temperate climate, Bulk insulation traps air in still layers, A pitched roof with a flat ceiling, showing 2 options for using reflective foil on the inside of bulk insulation; this is useful in all but warm tropical climates. Lead cappings must not be used with prepainted steel or zinc/aluminium steel or on any roof if the roof is part of a potable (drinking) water catchment area. Publication (s) AS 2047-1999. Fixings must be positioned a minimum of 12 mm from the edge of the sheet and not less than 50 mm from the edge of all corners. Steel walers act . Clause C1.9 (e) (vi) states that sarking-type materials which do not exceed 1mm in thickness and have a Flammability Index not greater than 5, may be used where a non-combustible material is required in Type A and B construction. Older-style halogen lighting cannot be covered with insulation as it is a fire risk. it helps to address the requirement within the BCA to protect the building from the entry of external moisture. Face reflective surfaces downwards or keep them vertical (except in Climate zone 1). Ceilings with exposed rafters are generally difficult to insulate without using expensive materials. P2.1.1 (iii) The best orientation for your home is the one that suits your climate zone. As building practices have improved, and houses have become more airtight, roof spaces have also been over sealed and the risk of condensation has been exacerbated. Fixings must be located not less than 50 mm from the edge of all corners. Maximum nail spacing using 2.8 mm galvanised clouts or flat head nails. (ii) Perforated gypsum lath with a normal paper finish Its insulation ability relies on the presence of an air layer of at least 25mm next to the shiny surface. Step by step instructions & how-to video. Insulation is a material that resists or blocks the flow of heat energy. Download the Thermoseal Wall Wrap Brochure for more information. Some current LED lights cannot be covered with insulation, but can be used in combination with a fire safety barrier tested and classified in compliance with Australian Standard AS/NZS 5110, installing thermal breaks between metal frames and cladding. glass wool, batts and rolls (often made from recycled materials), cellulose fibre loose fill (often made from recycled paper fibres), polyester, batts and rolls (often made from recycled materials), polystyrene, expanded (EPS) or extruded (XPS), as rigid boards, ensure sufficient subfloor ventilation as specified in the National Construction Code, where appropriate install underlay and carpet, or lay insulation board under floor finishes, insulate the underside of timber floors or suspended slabs exposed to outside air, insulate the underside and edges of suspended slabs. In the spirit of reconciliation the Australian Building Codes Board acknowledges the Traditional Custodians of country throughout Australia and their connections to land, sea and community. If a sarking material is perforated or considered a Non-Water Barrier in accordance with AS4200.1, it may not be able to provide weather protection. However, slab edge insulation is nearly always advisable, even though it is not mandated in the NCC. Because any foil insulation is electrically conductive, the risk of contact with electrical cables and equipment must be considered with all installations, and measures to eliminate the risk should be followed. Acceptable fixing sizes are (i) for hardwood and Cypress frames (A) 502.8 mm plain shank nails; or (B) 8-1850 mm self embedding head or wafer head screws; and (ii) for softwood frames (A) 503.15 mm annular threaded nails; or (B) 8-1850 mm self embedding head or wafer head screws. fixed so that the fixing does not penetrate the tip or thinner edge of the board beneath, i.e. Table 3.5.3.1 FIXING REQUIREMENTS FOR WALL CLADDING BOARDS, G = Galvanised fibre-cement nail For these requirements, you should check out the Bradford Thermoseal Firespec, which you can order through Network Architectural here. Where the ceiling insulation is loose fill or not fixed in position, or there is the possibility of extraneous combustible material such as leaves and pest debris getting into the roof space, maintain clearances by providing a barrier complying with Australian Standard AS/NZS 5110, or a guard or collar constructed of fire-resistant material. Wall cladding may be fixed through timber or metal battens attached to the wall frame in accordance with AS 1684.2, AS 1684.3, AS 1684.4 or NASH standard as appropriate (see fixing requirements for roof battens) so long as the minimum penetration into the wall frame is achieved. For more personalised assistance about wall sarking, or to place an order, please contact Network Architectural. This Standard applies to all work involved in the internal and external laying of ceramic wall and floor tiles. 3.5.4.6(a)(i) applies 'where practicable' because it is often impractical to extend the flashing 110 mm beyond the reveal; for example, where openings are positioned adjacent to a corner or where two windows are within 110 mm of each other. As a general guide, it is considered good building practice to sark all tiled roofs as For Flame Zone (FZ) areas, sarking is still required but additional precautions Note: Alternatively, a flexible foil-foam sheet can be installed from a roll continuously under the joists. Avoiding gaps when installing insulation in a wall frame. Raked or cathedral ceilings include sloping ceilings, vaulted ceilings, and flat or skillion roofs where there is no accessible roof space. The thermal resistance of slab-on-ground is approximately R.026. the wall must be surfaced with impervious material extending from the floor to not less than 50 mm above the top of the urinal . Insulation is a material that slows or prevents the flow of heat. Pay particular attention to how different types of sarking such as single or double-sided should be installed for maximum efficiency. Notes to Concealed rafters with a hybrid of bulk insulation between rafters and an option of continuous foam/foil sheet below, foil face down; this is useful in all but warm tropical climates. In hot humid climates (for example, Darwin) in air-conditioned buildings, the opposite is a better solution (foil facing outwards). (e)The following materials may be used wherever a, An esky in summer & a thermos in winter - push home comfort to the max without bill shock, Don't sacrifice comfort & safety in your shed or outdoor building, Dark walls, dark roofs take care with this hot industrial style, The weekend job that'll save money all year: DIY ceiling insulation, Learn more about how insulation works in your home, Fire protection for homes in bushfire zones, Acoustic and Thermal Insulation for HVAC Ducts, Access tools and help from Bradford Technical Services, An esky in summer and a thermos in winter - how to push home comfort to the max without bill shock. Bradford Supertel is a high performance insulation thats installed inside HVAC ducts for sound attenuation and thermal resistance. for 7.5 mm (minimum) thick fibre-cement comply with AS/NZS 2908.2 or ISO 8336; and, for 9.5 mm (minimum) thick hardboard comply with AS/NZS 1859.4; and. The performance of any insulation product how well it resists heat flow is know as its R value. The required R value of the batts will depend on your climate zone and site.