© R&D Roofing Ltd 2019. Walkways. Valley detail. Sealants. In case of warm roofs they have an insulation above the roof deck, in this way it keeps the deck ‘WARM’. Warm roofs are a type of roof construction that can include loft conversions, a ‘room in the roof’ scenario, often created with dormer windows, or simply a roof space that has been designed for habitation. If you are undergoing a domestic or a commercial rebuild, it must comply with part L of the building regulations document. Our roof conversions can be completed in just 2-3 days. Save my name, email, and website in this browser for the next time I comment. Part 1 – A Guide To Roof Construction: covers an overview of flat and pitched roofs. endobj It is the most acceptable type of construction for domestic possessions and belongings, as it avoids the need for aeration of the roof construction. PDF DWG. If your roof insulation doesn’t meet the minimum standards, it has to be upgraded! WARM ROOF This type of construction has the insulation above the roof deck, thus keeping the deck ‘WARM’. If your current insulation is poor, then you trigger part L of the building regulations document. In a warm roof construction the principal thermal insulation layer is located above the structural decking, resulting in the structural deck and support structure being at a temperature close to that of the interior of the building. The insulation is immediately below the waterproofing layer. <> A typical warm roof is shown in the sketch below. A vapour barrier will then need to be installed to reduce condensation in the roof structure. This will give additional stability to the roof structure. The object being to design out the possibility of warm moisture laden air coming into contact with a cold surface and condensing. We have been established for over 27 years in the Hampshire, Sussex and Surrey area and operate on a day to day basis providing top quality, honest roofing services. Tyvek® and AirGuard® in Warm Roof Applications. stream Having a manual for warm flat roof construction with details and a summary of rules to follow helps. PDF DWG. You need to agree with the terms to proceed, 15 Yew Tree Road, Hayling Island, PO11 0QE. Warm Roofs. Temperature Control. Verge. In a warm roof construction the Sarnafil membrane and SarnaTherm thermal insulation is installed above the structural decking. Sika Sarnafil. In a warm flat roof construction, the insulation is positioned above the structural deck and no ventilation is required. To eliminate all condensation risks and making it a true warm roof construction. Warm Roof Construction – requires that the entire roof construction is encapsulated within the insulation envelope of the building to be kept ‘warm’. Part 3 – Pitched Roof Detail: covers pitched roof detail: roof ridges and ridge tiles, roof hips and hip tiles, roof valleys, roof verges and lead flashings. I don’t want to remove part of the ceiling and work from below, as the room is in use as our kitchen-dining room, and also sealing with expanding foam is more difficult working from below. Steve from London Flat Roofing explains how warm flat roof construction works in this excellent short video: A warm roof construction allows heat to be conserved within a property – without the need for a ventilation system. Rooflights. 4 0 obj 2 0 obj In an earlier video you showed how to seal and insulate behind the fascia of a warm roof, so that you avoid condensation on the fascia, and even more importantly avoid cold air circulating between a warm roof and the ceiling below, which can completely defeat the aim of a warm roof. The insulation can be adhered, mechanically fixed or loose laid. Your email address will not be published. For a pitch lower than 14º the joints must be taped, between 14º - 22° there must be an overlap of 200mm, just steeper than 22° or unless it changes above 40º there must be an overlap of 150mm. Your roof deck – be it concrete or screed – will need to be waterproofed. The insulation is tapered to provide a fall to the roof to enable water to run to the water outlets. Primers and Cleaners. Our replacement roofs are so energy efficient that they can reduce heating bills. 9 mars 2017 - Explorez le tableau « Détails techniques architecture » de Caroline Nail, auquel 153 utilisateurs de Pinterest sont abonnés. Mechanical Attachment. The position of the Insulation can be wholly above or partially between and above the rafter; alternatively it can be positioned between the rafters or partially between and below the rafter. MY QUESTION therefore concerns the detail at the solid parapet walls. The following steps apply to extensive green roof construction. x����o�6�� ��� ��oE��i���&���A��["u��`�����ȵ�� �LK���_E��oW˫l�"/_��W�l�u>#��I���h�߷��C�X��jY䣋�/+��� �(����JN�$������'��`��o�\ �lF�XG6�P�� �vva����IGe�m�� ����T%���3��^c���8 �*��y�h?�����0�R���H$¿���R����+�@�*�Q��l��H&�o. The Roof Lantern Upstand in Detail; Darren Collins | 4th September 2017. If you strip the covering of an old flat roof, you automatically trigger part L of the building regulations document. endobj A warm deck/roof is where the insulation is placed on top of the rafters/joists and the roof covering is then placed over the insulation. A warm flat roof is formed by placing a layer of insulation over the top of the roof structure. R&D Roofing Contractors Ltd is a flat roof company who specialise in modern flat roofing systems. Warm roof build ups can be installed on most modern construction material types such as concrete, timber and timber based sheets. Vapour Control Layers. A warm roof construction has many benefits over a traditional ‘cold roof’, essentially it is a ‘breathable roof construction’, which allows moisture to escape which in turn prevents damp and any associated decay problems. They can be built up from profiled metal decks as the insulation selected would provide enough rigidity to span the open sections of such decks. NHBC recommend that this type of roof be considered as the standard form of construction. - Earn over 80% - Upload any CAD models including; - 3ds max , AutoCAD , Rhino , Vector works , Sketchup , Revit and more; Upload 3 0 obj In my case I have a cold roof which needs re-roofing, and also several boards need replacing.One side has a fascia, one meets the house wall, and the other two have parapet walls in 9″ solid brick. Between the ZINC PLUS and the insulation, the VMZINC Breather Membrane (link to 8.1 VMZINC Membrane) is fixed with an overlap depending on the pitch. However, this does not apply if you are repairing your flat roof by overlaying with a new waterproof layer. The recommended roof insulation for this method of warm roof construction is Mannok Therm Roof / MR insulation, which are lightweight and thermally efficient rigid PIR roof insulation boards. The insulation can be laid above, between or below rafter level, or in a combination of all these positions. hi Steve. VMZ-SN-CO-KN-b1-mansard. All our roof lanterns shown on this website are designed to be fixed onto a kerb-like detail which rises proud of the supporting flat roof assembly, precisely at the open edge of the lantern aperture. This usually keeps the deck ‘WARM’. Due to the insulation being over the top of the roof, the timber structure beneath is warm, which is why the term ‘Warm Roof’ is formed. Throughout the course of the year the roof deck and all below it is kept at a temperature close to that of the inside of the building, therefore the roof structure is protected from extremes of hot and cold, lessening the potential for damage caused by thermal movement. And finally fit new roof board to close the remaining strip of removed board. Ride / Hip. A warm roof construction allows heat to be conserved within a property – without the need for a ventilation system. Some roofs will already have a waterproof layer. In new flat roofs it’s becoming more and more common to undergo warm flat roof construction to abide by building regulations and save lots of money on your insulation costs. Warm Deck – this is where the insulation is placed on top of the rafters/joists and the roof covering is then placed over the insulation. A hybrid system comprising 120mm of IKO enertherm ALU insulation above the roof deck and VCL, and 100mm of the same product below will provide a U-value of around 0.11 W/m²K. Warm roof systems benefit from the insulation sitting above the deck. These factors can trigger part L of the building regulations document: 1. A warm flat roof or a built-up roof (BUR) is one where all the insulation is above the joists/deck, making them part of the warm fabric of the building. No ventilation is required for these types of roofs. VMZ-SN-CO-NO-b1-ridge. No ventilation is required for these types of roofs. Voir plus d'idées sur le thème architecture, detail architecture, façade détail. In a warm pitched roof construction the thermal Insulation is placed in the rafter line. PDF DWG. A warm flat roof is formed by placing a layer of insulation over the top of the roof structure. The boards are easy to handle and install and can help achieve excellent U-Values with just a single layer of insulation in the roof construction. For additional stability, you can also use steel joists that are built into one or both of the walls. Junctions skylight. Energy Efficient. The membrane is then attached to the insulation. This is usually the most satisfactory construction for domestic properties as it avoids the need for ventilation of the roof structure. %���� 3. Rainwater Outlets. Domestic roof construction is the framing and roof covering which is found on most detached houses in cold and temperate climates. Here, insulation is installed at rafter level, using rigid and/or semi-rigid insulation. You can find a link to the building regulations document here. Learn how your comment data is processed. This makes new conservatory roofs even more affordable. In pitched roof construction thermal insulation can be placed horizontally at ceiling level (cold roof); inclined along the line of rafters (warm roof) or positioned within the roof structure to form an insulated void (room-in-roof) which can result in warm and cold roof areas. Ideally, the insulation is positioned in a continuous layer above the rafters, so that the roof structure is in a ‘warm’ environment. Required fields are marked *. PDF DWG. VMZ-SN-CO … ... Roofs are also designated as warm or cold roof depending on how they are designed and built with regard to thermal building insulation and ventilation. See also: Part 2 – Pitched Roof Construction: covers pitched roof materials, basic pitched roof designs, cold and warm pitched roofs and pitched roof construction. Cold Deck – this is where the insulation is placed between the joists/rafters … This website uses cookies to improve your experience. By comparison, a warm roof would require 180mm of IKO enertherm ALU insulation to achieve the same U-value – raising the overall roof height by 60mm. 1 0 obj So far, so good. The basic construction of a flat roof starts with roofing timber that is laid across two upright items, usually two walls. <>/ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.32 842.04] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Designed for the trade - Open to the public. In a warm deck roof the insulation is positioned above the structural deck and no ventilation is required. %PDF-1.7 We provide our high quality service to domestic and commercial customers. Head verge wall abutment. Structural roof - warm construction; Verge abutment of a wall. The new goals of the document were to reduce CO2 emissions by 20% on new build dwellings and 27% on buildings other than dwellings, these reductions were taken from the baseline of 1990 and are thought to be achievable by 2010. 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