{"id":7130,"date":"2022-04-13T11:26:05","date_gmt":"2022-04-13T11:26:05","guid":{"rendered":"https:\/\/quantumprofilesystems.com\/dacatie\/?post_type=blog_post&#038;p=7130"},"modified":"2026-09-28T14:56:39","modified_gmt":"2026-09-28T13:56:39","slug":"how-do-i-specify-a-cavity-closer-or-cavity-barrier","status":"publish","type":"blog_post","link":"https:\/\/quantumprofilesystems.com\/dacatie\/blog-post\/how-do-i-specify-a-cavity-closer-or-cavity-barrier\/","title":{"rendered":"How do I specify a cavity closer?"},"content":{"rendered":"<p><strong>Saving energy,<\/strong> <strong>protecting life, health and property<\/strong><\/p>\n<p><strong>An architect and specifier <\/strong><strong>essential <\/strong><strong>guide to <\/strong><strong>cavity closers and fire cavity barriers<\/strong><\/p>\n<p><strong>Choosing and specifying the correct product for your projects<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7138 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/1.dacatie.2022-269x300.jpg\" alt=\"\" width=\"269\" height=\"300\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/1.dacatie.2022-269x300.jpg 269w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/1.dacatie.2022.jpg 379w\" sizes=\"auto, (max-width: 269px) 100vw, 269px\" \/><\/p>\n<p><strong>Background<\/strong><\/p>\n<p>The primary function of cavity closers and fire cavity barriers is to save energy, protect life, health and property. They both operate based on the simplest ideas but are an essential component in the construction of homes, places of work, indeed, anywhere we build. \u00a0So, where should a cavity closer or cavity fire barrier go? In principle anywhere with a cavity that needs to be closed.<\/p>\n<p>This can be around door and window reveals, or internally at party wall junctions, they all need to be close with some form of barrier.<\/p>\n<p><strong>There are two types of cavity barriers outlined in this guide:<\/strong><\/p>\n<ul>\n<li><strong>Cavity Closers<\/strong> \u2013 used anywhere where there is a cavity that can allow heat loss or spread of fire. They are used in traditional brick\/block, timber frame, rainscreen cladding in new and refurbishment projects. It is comprised of an insulated profile, closing off the cavity at reveals, acting as a DPC.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7139 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/2.dacatie.2022-300x146.jpg\" alt=\"\" width=\"300\" height=\"146\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/2.dacatie.2022-300x146.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/2.dacatie.2022.jpg 459w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<ul>\n<li><strong>Fire Cavity Barriers<\/strong><strong> &#8211; <\/strong>Approved document B of the building regulations, Fire Safety, defines a cavity barrier as: <em>\u201c<strong>A construction, other than a smoke curtain, provided to close a concealed space against penetration of smoke or flame, or provided to restrict the movement of smoke or flame within such a space<\/strong>\u201d<\/em><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7140 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/3.dacatie.2022-300x107.jpg\" alt=\"\" width=\"300\" height=\"107\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/3.dacatie.2022-300x107.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/3.dacatie.2022.jpg 508w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>Relevant cavities include party wall junctions, wall plate junctions, at the eaves, between fire compartments both horizontally and vertically.<\/p>\n<p>with a fire rating, to stop fire spreading into different areas of a building \u2013 these can be installed retroactively or in new builds.<\/p>\n<p><strong>Functions of Cavity Closers and Fire Cavity Barriers<\/strong><\/p>\n<ul>\n<li><strong>Prevent water penetration<\/strong>\u2013in compliance with\u00a0<strong><em>Building Regulations Part C<\/em><\/strong>. It is critical to set back the frame of a window a minimum of 30mm into the cavity and use a recognised sealant around the frame. Also, a cavity closer with ridges on will further help prevent water penetration.<\/li>\n<li><strong>Prevent heat loss and cold penetration<\/strong>\u2013 Cold bridging is when an area of a building has significantly higher heat transfer than the surrounding materials resulting in an overall reduction in thermal insulation of the building. The problems of cold bridging are recognised in the\u00a0<strong><em>Building Regulation Part L<\/em><\/strong>. Insulated Cavity Closers are used to overcome thermal loss that occurs around unprotected cavities and reveals. Thermal loss can result in problems of condensation, staining and mould growth at the reveals of these openings. Prolonged exposure to such factors will lead to a deterioration of the internal plaster and paint work. The use of cavity closers will help to prevent the occurrence of such factors.<\/li>\n<li><strong>Create a fire barrier<\/strong>\u2013 To comply with\u00a0<strong><em>Building Regulation Part B<\/em><\/strong>\u00a0a fire rated cavity closer should be used. A fire rated cavity closer can prevent the spread of fire for up to 1 hour. A purely insulted cavity closer without a fire rating will not actually comply with Part B.<\/li>\n<li><strong>Comply with Part L\u00a0<\/strong>\u2013 Building Regulation Part L compliance is ever more important with sustainability being prioritised and reductions in heat losses. The minimum thermal resistance path through the cavity closer must be at least 0.45m2k\/W (the higher this number the lower the heat loss).<\/li>\n<li><strong>Not all cavities that need closing are at reveals<\/strong>. Other cavities include party wall junctions, wall plate junctions and at eaves. In timber frames and SIP construction, fire sock products are often used. These are fire rated compression fit products that stop fire spreading into adjacent areas of a building (can be installed retroactively or in new builds).<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7141 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/4..dacatie.2022-300x181.jpg\" alt=\"\" width=\"300\" height=\"181\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/4..dacatie.2022-300x181.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/4..dacatie.2022.jpg 540w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><strong>Failures from lack of\/insufficient of Cavity Closers and Fire Cavity Barriers<\/strong><\/p>\n<p><strong> <img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7142 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/5..dacatie.2022-300x167.jpg\" alt=\"\" width=\"300\" height=\"167\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/5..dacatie.2022-300x167.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/5..dacatie.2022.jpg 515w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/strong><\/p>\n<p>Cold bridging occurs where an element of a building has significantly higher heat transfer than surrounding materials, resulting in an overall reduction in thermal insulation of the building.<\/p>\n<p>This leads to excessive heat loss, condensation and mould growth, damaging to human health, property and value.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7143 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/6..dacatie.2022-300x169.png\" alt=\"\" width=\"300\" height=\"169\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/6..dacatie.2022-300x169.png 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/6..dacatie.2022.png 510w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>In the Grenfell Tower catastrophe, one of the findings showed no cavity barriers were installed. Part B requires compartmentation at floors and between apartments with fire cavity barriers. Fire penetrated the cavity and was drawn up the building, with nothing to stop it. The speed of spread of the resulting fire was too rapid to enable effective firefighting and rescue services to act, resulting in the loss of 71 lives.<\/p>\n<p><strong>Types of Cavity Closers and Fire Cavity Barriers<\/strong><\/p>\n<p>There are two types of cavity closers in use:<\/p>\n<p><strong>Bar length cavity closers<\/strong><\/p>\n<p><strong><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7144 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/7.dacatie.2022-300x89.jpg\" alt=\"\" width=\"300\" height=\"89\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/7.dacatie.2022-300x89.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/7.dacatie.2022.jpg 576w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>\u00a0<\/strong><\/p>\n<p><strong>Bar length cavity closers are available in two forms:<\/strong><\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<ol>\n<li><strong>\u2018Check reveal\u2019<\/strong> &#8211; External structural opening is smaller than the window frame<\/li>\n<\/ol>\n<ul>\n<li><em>External face of the window frame butts against back of external skin<\/em>.<\/li>\n<li>Weather seal is formed between front face of the window and opening.<\/li>\n<li>Used in areas of severe exposure to driving rain \u2013 e.g., Wales, Scotland and Northern Ireland<\/li>\n<\/ul>\n<ol start=\"2\">\n<li><strong>\u2018Standard\u2019<\/strong> &#8211; Weather seal is formed by outer perimeter of window in a \u2018flush\u2019 reveal.<\/li>\n<\/ol>\n<p><strong><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7145 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/8..dacatie.2022-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/8..dacatie.2022-300x300.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/8..dacatie.2022-150x150.jpg 150w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/8..dacatie.2022.jpg 315w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/strong><\/p>\n<p><strong>Frame former cavity closers<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7146 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/9..dacatie.2022-300x131.jpg\" alt=\"\" width=\"300\" height=\"131\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/9..dacatie.2022-300x131.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/9..dacatie.2022.jpg 576w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>*Push fit can be retrofitted to existing buildings whereas fixing tie method and frame formers can only be used in new build<\/p>\n<p><strong>Relevant Building Regulations &amp; Standards<\/strong><\/p>\n<p>Legislation and industry standards can be traced back to part L 2013, conservation of fuel and power; Part C2 on resistance to moisture; Part B (updated in 2017)and BS5350 and Robust Detail 262.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7147 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/10.dacatie.2022-300x151.jpg\" alt=\"\" width=\"437\" height=\"220\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/10.dacatie.2022-300x151.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/10.dacatie.2022.jpg 448w\" sizes=\"auto, (max-width: 437px) 100vw, 437px\" \/><\/p>\n<p><strong>Part L \u2013 Conservation of Fuel and Power<\/strong><\/p>\n<ul>\n<li>Cavities should be closed off around window and door reveals with a closer which will: Provide a <strong>Minimum<br \/>\nThermal Resistance Path (MTRP) <\/strong>of at least <strong>45m2K\/W. <\/strong><\/li>\n<li>Specify an insulated closer with this<strong> MTRP<\/strong>. <strong>This will meet the guidelines contained in the Building Regulations <\/strong><br \/>\n(Part L) \u2013 2013 amended \u201cConservation of Fuel and Power\u201d<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7148 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/11..dacatie.2022.jpg\" alt=\"\" width=\"232\" height=\"232\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/11..dacatie.2022.jpg 232w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/11..dacatie.2022-150x150.jpg 150w\" sizes=\"auto, (max-width: 232px) 100vw, 232px\" \/><\/p>\n<p><strong>Part C \u2013 Water Ingress<\/strong><\/p>\n<p>Water Ingress\u00a0 can lead to damp, mold growth &amp; condensation. This is unattractive and can cause health issues.<\/p>\n<ul>\n<li>Specification should ensure the window is set back at least 30mm into the reveal.<\/li>\n<li>A recognised sealant should be used internally and externally.<\/li>\n<li>The cavity closer should have grooved flanges &#8211; when the water comes into contact with the cavity closer it is drawn down the closer and into the cavity<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7149 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/12..dacatie.2022-300x168.jpg\" alt=\"\" width=\"300\" height=\"168\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/12..dacatie.2022-300x168.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/12..dacatie.2022.jpg 385w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><strong>BS 5250 + Robust Detail 262<\/strong><\/p>\n<p>New guidance recommendations:<\/p>\n<ul>\n<li>To reduce condensation risk to floors, walls and roofs reference should be made to <strong>revised BS 5250<\/strong>,<\/li>\n<li>Limiting thermal bridging and air leakage: robust details and <strong>BRE Report BR 262 <\/strong>Thermal insulation &#8211; avoiding risks.<\/li>\n<li><strong>BS 5250 <\/strong>control of condensation in buildings<\/li>\n<li><strong>Robust Details 262 <\/strong>&#8211; thermal insulation avoiding risks<\/li>\n<\/ul>\n<p>* Complying with Parts L and C2, also means meeting BS5250 and Robust Detail 262<\/p>\n<p><!--more--><\/p>\n<p><strong>Fire Safety (Part B)<\/strong><\/p>\n<p>Fire can be undetected in cavities for extended periods. There needs to be sufficient protection<br \/>\nto allow time for occupants to escape.<\/p>\n<ul>\n<li>\u201cWindow and door reveals should be closed off with a fire \u2018barrier\u2019 with an integrity rating of at least 30 minutes\u201d (BR Part B)<\/li>\n<li>Specify a cavity closer with at least 30 minutes fire integrity.<\/li>\n<li>Becomes a barrier with the approved fire rating<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul>\n<li><strong>8 of B4 of the 2019 Approved Document B Vol 1 Section 8:<\/strong><\/li>\n<\/ul>\n<p><em>In this context cavity barriers relating to \u2018relevant\u2019 buildings as described in 7(4) of the Building Regulations must be addressed. Also those described as \u2018other\u2019 buildings, see 10.3 of ADB1<\/em><\/p>\n<ul>\n<li><strong>8 of B4 of the 2019 Approved Document B Vol 2 Section 9:<\/strong><\/li>\n<\/ul>\n<p><em>In this context cavity barriers relating to \u2018relevant\u2019 buildings as described in 7(4) of the Building Regulations must again be addressed and also those described as \u2018other\u2019 buildings, see 12.3 of ADB2<\/em><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7150 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/13..dacatie.2022-300x189.jpg\" alt=\"\" width=\"300\" height=\"189\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/13..dacatie.2022-300x189.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/13..dacatie.2022.jpg 318w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><strong>Specifying the correct cavity closer and cavity fire barrier &#8211; key considerations<\/strong><\/p>\n<ul>\n<li><strong>What is the <\/strong><strong>width of the cavity? <\/strong><\/li>\n<li><strong>How wide should the cavity be? <\/strong><\/li>\n<li><strong>Is there a maximum and minimum?<\/strong><\/li>\n<\/ul>\n<p>Cavity closers can vary in width from 40mm up to 200-300mm. As a rule, the wider the cavity, the better the thermal value, but this can introduce additional costs.<\/p>\n<p>Improvement in insulation performance has allowed the cavity reveal to decrease to 150mm.<\/p>\n<p>Fire rated cavity closers of 170mm and a fire rated cavity sock type barrier to 300mm are now available.<\/p>\n<p>When specifying a cavity of 100mm, the barrier or closer will be supplied slightly bigger as a push fit, to achieve fire rating. Cavity closers are available in 5mm increments, whilst fire barriers are available in 10mm increments.<\/p>\n<p><strong>Detail Examples: Cavity Closers<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7151 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/14..dacatie.2022.jpg\" alt=\"\" width=\"231\" height=\"256\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7152 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/15..dacatie.2022.jpg\" alt=\"\" width=\"269\" height=\"230\" \/><strong>\u00a0<\/strong><\/p>\n<p><strong>Detail Examples: Fire Cavity Barriers <\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7153 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/16..dacatie.2022-300x260.jpg\" alt=\"\" width=\"300\" height=\"260\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/16..dacatie.2022-300x260.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/16..dacatie.2022.jpg 328w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7154 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/17..dacatie.2022-300x259.jpg\" alt=\"\" width=\"300\" height=\"259\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/17..dacatie.2022-300x259.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/17..dacatie.2022.jpg 351w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7140 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/3.dacatie.2022-300x107.jpg\" alt=\"\" width=\"300\" height=\"107\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/3.dacatie.2022-300x107.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/3.dacatie.2022.jpg 508w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><strong>Environmental Considerations<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7133 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/19..dacatie.2022-300x168.jpg\" alt=\"\" width=\"300\" height=\"168\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/19..dacatie.2022-300x168.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/19..dacatie.2022.jpg 602w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>Cavity closers and Cavity fire barriers do not actually come under BREEAM or the green guide. Dacatie products have 0% ozone depletion potential, 0% global warming potential, and we use a high percentage of recycled compounds where possible.<\/p>\n<p>&nbsp;<\/p>\n<p>Life Cycle Considerations for a good Insulated Cavity Closer:<\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li><strong>Zero Maintenance during the life of the building<\/strong><em>. But it is advised that cavity closers should be replaced if\/when windows are changes or removed for any reason. To increase thermal efficiency or upgrade to meet new standards with newer technology.<\/em><\/li>\n<li>Carrier is made from part recycled uPVC and can be recycled in full at end of life<\/li>\n<li>Mineral wool is non pollutant \u2013 no formaldehyde<\/li>\n<li>ISO 9001 and ISO14001 source<\/li>\n<li>Produced using LEAN processes \u2013 least waste \u2013 best value<\/li>\n<\/ul>\n<p><em>* For further guidance see: Site Waste Management Plans Regulations 2008<\/em><\/p>\n<p><strong>Specifying the Correct Product &#8211; Summary<\/strong><\/p>\n<ul>\n<li><strong>Cavity widths &#8211; How wide should they be?<\/strong><\/li>\n<\/ul>\n<p>Specify an insulated cavity closer to accommodate the cavity width of the building design \u00a0 (available in 5mm increments).<\/p>\n<ul>\n<li><strong>Heat loss\/ cold penetration &#8211; How can it be controlled?<\/strong><\/li>\n<\/ul>\n<p>Specify an insulated cavity closer to give MTRP of at least 0.45m<sup>2<\/sup>K\/W and window\/door<br \/>\nset back of 30mm (BRE Part L).<\/p>\n<ul>\n<li><strong>Water Ingress &amp; Air Infiltration &#8211; How can it be restricted?<\/strong><\/li>\n<\/ul>\n<p>Ensure frame set-back is a minimum of 30 mm for severe weather rating<\/p>\n<ul>\n<li><strong>Fire protection in cavities &#8211; What is the best solution?<\/strong><\/li>\n<\/ul>\n<p>Specify an insulated cavity closer with a fire rating of at least 30 minutes integrity to act<br \/>\nas a barrier in cavities around window and door reveals (BRE Part B).<\/p>\n<ul>\n<li><strong>Sustainability &#8211; How do these affect cavity closers?<\/strong><\/li>\n<\/ul>\n<p>BREEAM does not directly affect cavity closer choice, however, specify a closer with<br \/>\ngreen credentials which will enhance the environmental aspects of any construction.<\/p>\n<p><strong>Specifying the Correct Product for your Project:<\/strong><\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><strong>You can find everything you need to specify the correct product for your project here:<\/strong><\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><a href=\"https:\/\/quantumprofilesystems.com\/dacatie\/\"><strong>https:\/\/quantumprofilesystems.com\/dacatie\/<\/strong><\/a><\/p>\n<p><strong> <img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7134 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/20..dacatie.2022-300x154.jpg\" alt=\"\" width=\"300\" height=\"154\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/20..dacatie.2022-300x154.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/20..dacatie.2022.jpg 602w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7135 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/21..dacatie.2022-300x160.jpg\" alt=\"\" width=\"300\" height=\"160\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/21..dacatie.2022-300x160.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/21..dacatie.2022.jpg 593w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><strong>\u00a0<\/strong>Simply follow the links to services and follow the drop-down menu:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7136 aligncenter\" src=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/22..dacatie.2022-300x154.jpg\" alt=\"\" width=\"300\" height=\"154\" srcset=\"https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/22..dacatie.2022-300x154.jpg 300w, https:\/\/quantumprofilesystems.com\/dacatie\/wp-content\/uploads\/sites\/4\/2022\/04\/22..dacatie.2022.jpg 602w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>Alternatively, please feel free to contact us here:<\/p>\n<ul>\n<li>email:\u00a0\u00a0\u00a0 <a href=\"mailto:info@dacatie.co.uk\">info@dacatie.co.uk<\/a><\/li>\n<li>visit:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <a href=\"http:\/\/www.dacatie.co.uk\">www.dacatie.co.uk<\/a><\/li>\n<li>follow:\u00a0 <a href=\"http:\/\/twitter.com\/dacatie\">@Dacatie<\/a><\/li>\n<li>tel:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 +44 (0) 161 627 4222<\/li>\n<li>fax:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 +44 (0) 161 627 4333<\/li>\n<\/ul>\n<p>Quantum Profile Systems Ltd, Salmon Fields, Royton, Oldham, OL2 6JG, UK<\/p>\n<p><strong>About us:<\/strong><\/p>\n<p><strong>Dacatie make the widest possible variety of cavity closers, fire rated barriers and fire barriers in the UK.<\/strong><\/p>\n<p>We are also part of a bigger group- <a href=\"https:\/\/quantumprofilesystems.com\/\"><strong>Quantum Profile Systems Ltd<\/strong><\/a> and have been operating for over 50 years:<\/p>\n<ul>\n<li>The largest range of <a href=\"https:\/\/quantumprofilesystems.com\/quantum-flooring-accessories\/\"><strong>PVC contract<\/strong> <strong>flooring accessories<\/strong><\/a> in the UK, including stair nosings, entrance matting, transition profiles and skirting profiles.<\/li>\n<li>We also manufacture, under the<a href=\"https:\/\/quantumprofilesystems.com\/qwood\/\"> <strong>Qwood<\/strong><\/a><strong> brand,<\/strong> a range of products that go into the joinery market. Eight out of ten joiners use our profiles in their windows.<\/li>\n<li>Qwood looks like timber, acts like timber, paints like timber but without the small timber profile. QWood is a timber composite, it enhances the performance of windows, it will not bow, crack or rot.<\/li>\n<li>We also make profiles in <a href=\"https:\/\/quantumprofilesystems.com\/qlean-solutions\/\"><strong>QLean<\/strong><\/a>, where we supply bespoke PVC and uPVC extrusions to the offsite marketplace.<\/li>\n<\/ul>\n<p><strong>QPSL are Lean, Green, Safe and Clean &#8211; our principles:<\/strong><\/p>\n<ul>\n<li>To create value for customers; generate flow to eliminate job queues; let customer pull decide what is made; strive for perfection; and never be satisfied, always learning to be better.<\/li>\n<li>We don\u2019t have an order book; we wait for the phone to ring, get it on the system, manufacture it that day and then ship it out that night.<\/li>\n<li>We are green, we are heading towards a 0% waste site, we have environmental sustainability in all we do.<\/li>\n<li>We are ISO14001 certified. Its more than that, it\u2019s a culture, we do waste walks and turn bins upside down to see what is in them and question everything in there.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Saving energy, protecting life, health and property An architect and specifier essential guide to cavity [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":12186,"comment_status":"open","ping_status":"closed","template":"","tags":[],"blog-category":[21,20,23,22],"class_list":["post-7130","blog_post","type-blog_post","status-publish","has-post-thumbnail","hentry","blog-category-cavity-barrier","blog-category-cavity-closer","blog-category-dpc","blog-category-fire-stop"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How do I specify a cavity closer? - Dacatie<\/title>\n<meta name=\"description\" content=\"he primary function of cavity closers and fire cavity barriers is to save energy, protect life, health and property.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/quantumprofilesystems.com\/dacatie\/blog-post\/how-do-i-specify-a-cavity-closer-or-cavity-barrier\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How do I specify a cavity closer? 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