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    Technical Centre

    Building Insulation

    A guide produced by Celotex to show where Celotex products fit into their range, and the alternatives available from other manufacturers.

    "EcoTherm has developed the guide in collaboration with industry leading contractors to ensure the guide is concise and easy to use, saving time and confusion on site. Last year we launched our 'application branding' concept which simplified the specification process for all. Now we are making it even easier by explaining the installation of the specified product in 4 simple steps:

    1. Application
    2. Laying and fixing pattern
    3. Application details
    4. Relevant product

    There is nothing more infuriating than standing on a cold, wet site and reading 'please refer to BS 6528:2005 Code of Practice for the structural use of masonary part 1, structural use of unreinforced masonary' - We like to keep things simple by explaining the procedures clearly and concisely."


    Source; Ecotherm Insulation Extra


    Guide to Ecotherms PIR product range, suggesting solutions and applications. Designed for specfiers in order to choose the right product and gain maximum performance.

    Celotex's guide on their product range, applications, and meeting Part L 2010 requirements

    Complete to guide to Isovers products and solutions for Structural & Building applications - Pitched Roofs, Walls, Floors & Metallic Buildings. Also a section on Building regulations.

    Acoustic requirements for floors as per Approved Docoument E 2003, from John C Wilkins -  Acoustic Supplies.

    Comparison guide for Kingspan Insulation products, along with product details and application guides.

    Click here to view the Kingspan Insulation Product Selector.

    A comprehensive website aimed at the DIY or end user, explaining the benefits of Insulation.

    Click here to visit

    Pocket quick guide to Knauf Insulation's range of Glass, Rock & Polyfoam products for Walls, Floors and Roofs.

    Introduction to Rockpanel

    Rockpanel Group is part of the Rockwool International A/S Group.

    The company manufactures board material for exterior cladding using basalt rock a sustainable resource. Rockpanel® products combine all the benefits of stone and wood.

    It’s quick and easy to work, durable and attractive - which is why they say: With Rockpanel; It is possible!

    Rockpanel is ideally suited to both new build and renovation projects in areas such as:

    • facades;
    • roofline applications: like roof edging, -projections, gutter finishing, dormers, fascia boards or parapets;
    • other detailing

    Quick guide to Rockwool's range of products for Roof (Flat & Pitched) Wall and Floor Insulation

    A quick guide to Rockwool's core building insulation product range; Flexi, Cavity, TCB, Rockfloor, Fire Barrier & Rollbatt

    Building Insulation, Industrial Insulation


    Rockwool have produced comprehensive guidance as to the main changes to Part L 2010. Download the brochure "An Introduction to Part L 2010" (and it’s supporting documents) which covers information on new build and existing residential and non-residential buildings plus the party wall bypass effect. 


    •  ‘Design’ submissions are now part of the Regulation – submitting a design stage calculation and specification list to Building Control Bodies will be mandatory before building starts. Previously only the As-built calculation was a requirement.
    • Party walls – Plus their associated thermal bypass heat losses will be included for the first time in the calculations. You will need to insulate and seal your party wall cavity or use solid walls just to match the notional building.
    •  Thermal bridges – ‘Accredited Details’ scheme aimed at ensuring that developers only claim enhanced benefits in their SAP modelling by using approved accredited construction details which have actually been used (0.08 for accredited construction details is no longer an option).
    • Swimming Pools – New Indoor swimming pools will require a U-value for the basin walls and floor which should be no worse than 0.25W/m²K
    •  Air Permeability – Further improvements on air tightness. Part L 2010 now requires double the number of pressure tests to meet compliance. Generally a value between 5.0 & 7.0 m3/(hm2) will need to be achieved. 15.0m3/(hm2) can still be used in small developments but will tend to require improving further the performance of thermal envelope.
    • Thermal Mass – The heat capacity of the external and internal building fabric will be used in the calculation of TER & DER results. You will now have to define the internal walls, floors and ceilings along with any party walls. Increasing the effective thermal mass reduces the need for heating and cooling. However the rules or calculating heat capacity mean that items such as internal drylining, thermal lining and lightweight constructions will reduce your effective thermal mass.
    •  Fabric limits – Maximum area weighted U-values have been improved from the 2006 standards. The area weighted U-values are maximum values and unlikely to be low enough to comply with CO2 emissions requirements.


    Brochures available for download here are:

    •  An introduction to Part L
    •  An introduction to Part L – U-values
    •  An introduction to Part L – Insulating Pipes and Ducts.

    Key Points

    • System for comparing construction products for ignitability, flame spread, heat release, smoke production and propensity for producing flaming droplets/particles etc.
    • Accepted by all European Union States but not mandatory or applied in the UK
    • Products achieving A1 classification, under the Euroclass system, are defined as non-combustible in UK Regulations.

    Fire Safety Legislation

    The implementation of a single classification system across the EU member states has introduced a common method for comparing the reaction to fire performance of construction products.

    Testing is standardised through the use of BS EN 13501-1 ‘Fire classification of construction products and building elements’.

    For insulation products intended to be used in wall and ceiling constructions, there are seven reaction to fire classification levels available A1, A2, B, C, D, E and F., additional classifications provide information on a product’s tendency to produce smoke and flaming droplets or particles.

    Rockwool stone wool insulation is classified as A1 which is the highest ranking of the reaction to fire classifications. Non-combustible in nature, Rockwool can withstand temperatures in excess of 1000°C without melting.