Search our range of videos, step by step guides, manuals and FAQs for all you need to install your new roof. Where a cold flat roof does incorporate insulation this is in the form of mineral wool stuffed in between the timber rafters/joists, with a minimum 50mm (2 inch) air gap left clear in between the insulation and the roof deck. However, this also allows cold air to enter. Where the existing roof deck is in satisfactory condition and of a suitable material e.g. Because this design works by conserving heat, no ventilation is required. Despite its name, a cold roof does actually provide some insulation but it is named as such because the insulation is laid between the rafters. The best bit is, you can add all those materials to your basket in just one-click or send the quote to yourself for later! %PDF-1.3 Ventilation is required for these roofs. In the case of a flat roof the roof deck and waterproof membrane are supported on joists, the internal ceiling is attached to the underside of the Good external ventilation should be installed in the form of soffit vents. A vapour barrier or vapour control layer is an essential component of any warm roof. I have been in this exact situation before on several occasions and it is down to the BCO at the time, the old methods of constructing a warm roof were to either insulate over the deck or to completely fill the void, some no longer feel that completely filling the void constitutes a warm roof and that warm air can still get up to the underside of the cold roof deck, (You must log in or sign up to reply here. This gap is necessary to allow air-flow, so that warm, moist air, is allowed to escape rather than coming in to contact with the ‘cold deck’ and condensing. Traditional cold deck flat roof. Furthermore, an Inverted roof is a different type of warm deck roof, where the insulation is installed above the membrane and so no vapour control is needed. It turns out though that it was not done correctly and the Celotex was pushed to the underside of the roof and not the top of the ceiling. Rest assured that it only takes a few minutes to supply the specifics of your roof before the calculator presents your with an accurate quote. Julian and his team provide a great building consultancy service with high quality and thorough reports to quickly to suit…, I’d like to take this opportunity to thank you for the work you have done on this matter, your knowledge…, Thank you for your email of 6 February and for the Dilapidations Assessment. How do I ventilate? 2 0 obj In the case of a flat roof the roof deck and waterproof membrane are supported on joists, the internal ceiling is attached to the underside of the joists and should have a vapour barrier to stop condensation penetrating the internal decor. 2 0 obj stream It's not so much building control officers being stuck in the dark ages. Price up a full ClassicBond or ClassicLiquid kit in just a few simple steps, then save quote for later or add all the materials to your basket in one-click! Our Midlands training centre certifies thousands of professionals each year, offering 20 year membrane guarantees to certified installers. endobj Find out more, © Copyright 2010-2020 Rubber4Roofs Ltd. With discounts available both online and over our trade counter, sign up or login to your account today! EPDM Flat Roofing Systems for the Trade & DIY. In the case of a flat roof the roof deck and waterproof membrane are supported on joists, the internal ceiling is attached to the underside of the joists and should have a vapour barrier to stop condensation penetrating the internal decor. Contrasted with the cold deck roof, this construction has a much lower risk of condensation as the void will be of a comparable temperature to the roof. Our range of material calculators have been developed to take all the hassle out of ordering all the materials required for your new flat roof system. All Rights Reserved. This can lead to rotting timbers, damp ceiling and ineffective insulation. Copyright © 2020 Bradley-Mason LLP. 4 0 obj Complete one of our 1-Day training courses to receive 20-year membrane guarantees and inclusion to our approved installer network. Section 25 Notices – Lease Renewal under the Landlord & Tenant Act 1954. I'm now at the stage to insulate and plasterboard the flat roof and want to minimise any future risk. A cold roof design usually leaves a 50mm gap between the top of the insulation, and the roof deck above. Cold deck. Flat roof cold deck to warm deck EPDM advise. I will get you…, Dominic Hayes – Group property Director – Nuffield Health, I am writing on behalf of Thorntons Plc to thank Bradley Mason for the excellent works carried out to our…, Richard Booth – Building and Services Manager – Thorntons PLC, Just a quick note of genuine thanks for a great piece of work, enabling us to achieve our goal! Our brand NEW Classic Liquid Calculator builds on the success of our EPDM calculator, bringing simplicity to purchasing all your liquid materials effortlessly! Incorporated in England and Wales. J j�^��iw\̒'�� q�,�O� GN2+ nH��o=���TN�����_��Fv��M��F���f����N�W�M�5��i��IU�$=ΞfM�s ��9A�ai=) ����N�Z���G"h]�;oU��K4��?_$����be� Discussion in 'Building' started by ihawk, 21 Jan 2013. The roof structure, above the ceiling, is not insulated at all. It will really help in our negotiations with the landlord. air gap above the insulation for air flow. Call Ashford Building Services today on 01233 626 257. This is known as a cold roof because the roof deck and roof space are close to the external air temperature. A cold deck roof is where the insulation is placed between the joists/rafters or in between the ceiling joists in the case of a pitch roof. Hot deck/cold deck systems are an air handler based solution where the flow for the building is split into two, with one part being heated and one part being cooled. xڭ}]�$Gr�{���=q�C2�?��$r�#n�x\8襧��3˙nn�����]����Sͥa%�tVVf�������O����S=3GWk9�N9�9��������˯�����d�?�ʿ7�������_��iv)'�B�+�z��p���O�������/����dO߿9}�ݧW���wo�N����������}�3�M'/�Tk��}���M�ʧve���9�,���.����T����G��jK=ɟ��._-�x����n��?���髇��q��|C0a��tţ�骋�0k�����~߃�;힌 ��C9e+��_�x/_1ݼ��+[c���� ������z\w����u�9����떤�;�����޹v���p�u'����u�+����?�|���AJ��Se��;���v��O��M5�?��/>�>�^"�����T��Y"�O>�?^�u�s2՗��w�����\\x^__k��v����\��~���,���w�v�押��/���J�\�|�q����1�S{��ؗ��xyc�}�q�s��ݚOv��\������v�\.~���5VϷ�n�����J ?,Ȃ.�[�̍��,�����兞�+��\n��׹�s�c�߹��`7�n-%'o,\v�~��u�Xr"OM����7�o�����eY���J��?�M������e'�E�d�%�.�vwM�u�H�!ѿ����1$%��›Dq��sZ��IŜ�F�ۚaή����"�t�pUl�{�s�Ű�#[�����nN֤L��JBd�T�� �3++��J�Z�]�������Dg_�&�ݿ�,+���ʾQ�d��:�����,9+�\t�u��%՗�_���U�K�p��#��:�$MH�������]>| ���J�h������+�9�Nzy�!�c�*������t����8L/ ��@0]֩�t��מ.�)',�3ٯ)�-��,���$s����`�sVr�h��!��ї邬#�ɍɹ-9j��N� ��ޥ˲��c,�w0�]�{�ػq��_���f��ŒiI`���������A$H`���d�&��# �! In the winter condensation forms on the ceiling and sometimes causes a dripping into the room. Traditionally, flat roofs simply consisted of a structural timber deck with a waterproof covering directly applied to the top of the deck. This can lead to rotting timbers, damp ceiling and ineffective insulation. Unfortunately this means a great deal of heat is also lost in the process. Easy to install one piece roofing, What is the difference between ClassicBond and Firestone EPDM. By moving the insulation to the outside of the structure, the roof deck is effectively brought inside, which results in a ‘warm deck’ (hence the name), this removes the the possibility of condensation forming on the underside of the deck and eliminates damp. <> In the West Midlands? As a result, this type of roof is known as a cold roof. This ensures that your investment in energy efficiency is protected and will continue to pay dividends long in to the future, repaying itself many times over. plywood, the insulation is fixed directly on top, often with the existing felt acting as the vapour barrier. My builder who I have to say was good, fitted a loft conversion with what I now know is a cold deck roof. Warm deck or cold deck flat roof that is the question.