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Products: Combustible foam insulation and fire-rating dormer cheeks within 1m of boundary

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    Posted By: SteamyTeaIsnt CE a self cert marking


    Sort of, the actual CE documentation is produced by the manufacturer (ATDs, DoPs etc) but the declared performance usually has to be tested by an approved notified body (e.g. BBA/NPL/Fraunhofer or whoever) and factory production control (like ISO9001 or similar) usually comes into it too. AFAIK there's no hEN (harmonised euro norm) for MgO boards specifcally, so it maybe isn't required under the CPR (don't deal with MgO or anything similar so can't say 100%) but you can mark to other standards if you like. The legislation is pretty complex and can apply slightly differently to different product categories, but that's the approximate gist of it.

    What CE marks are not is any statement of fitness for a specific purpose, it just ensures that all similar products are tested the same way throughout the EU, and are subsequently produced to that spec consistently. Its enforced reactively by Trading Standards in the UK, so if you bought a CE marked product that wasn't up to the declared spec, that would be who you'd complain to.
    • CommentAuthorShevek
    • CommentTimeAug 1st 2013
     
    A little update:
    Turns out the BRE test data Dragonboard has is for an Icynene insulated wall that includes stone wool insulation.

    They suggested I speak to M. Morris, distributor of Icynene in the UK, and he tells me that although Icynene is combustible the way it behaves in a fire is to shrink and char.

    I'm told 12 mm should be fine but there's simply no test data I can put my hands on for a Icynene-only insulated wall.

    We've purchased 12 and 8 mm Magnesium Oxide board which we're going to use as 2 layers with staggered joints. This is the advice I was getting from the likes of Promat. In between now and installing the Icynene I'll have more of a think about whether we add stone wool in some way or not.
    • CommentAuthorcannett85
    • CommentTimeAug 16th 2013
     
    If you want fire rating on a board Magnesium oxide boards or magnesium silicate boards are class A Fire rated. Inside that you could use Pyrogel as the insulation which is also fire rated. The magnesium board can be screwed to the studs and finished using base-coat mesh and render or any other recommended render systems.

    This is simple to install, wont effect breath-ability. Bare in mind Breath-ability is a combination of 3 characteristics. Not just vapor permeability, as the material must also be hygroscopic and capillary conductive too. I would always advise to make sure materials are truly breathable before you buy.

    A lot of the magnesium boards on the market are also classed as a racking board which will give structural stability.
    • CommentAuthorShevek
    • CommentTimeJan 17th 2014
     
    Hi again everyone (I've been in hibernation over winter)

    Any thoughts on the best way to support the stone wool insulation shown in the attached detail (for fire insulation purposes)?

    I'd like to support it in some way so that it stays in place for as long as possible in the event that a fire eventually melts the Icynene core.
  5.  
    Welcome back. Hope you're well rested.

    Chicken wire is the usual solution. Can you staple it to the back of the stud before the Icyene is injected?

    David
    • CommentAuthorShevek
    • CommentTimeJan 17th 2014
     
    Thanks David.

    I wondered about chicken wire but a Euroform guy I was talking to the other day suggested that it might act as a thermal coupling and increase the chances of enough heat getting to the Icynene to ignite it?
  7.  
    It goes on the Icyene side of the stone wool. It doesn't bridge any structure or insulation, so shouldn't change any temperatures (either in service or in fire conditions).

    David

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