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Found 3 results

  1. Hi, we have a section of our loft conversion which we are desperate to have signed off by the BR inspector. There are a few obstacles to this however: he may insist on thicker/deeper rafters (they are currently 4 x 2s) even if he doesn't insist on that, he may insist on 6" Celotex insulation If he insists on either of these, it renders the space quasi-unusable (it's right on the borderline right now). So my question is: I think BR doesn't hinge on depth of insulation but rather quality/U rating, is that right? If so is there any super insulation type product out there which won't bring the roof down further (ie. beyond the 4x2s) but nonetheless hit the required rating?
  2. Okay, big iceberg delivery yesterday, so now I need to start laying the insulation for my slab: Bungalow has two extensions which are piled slabs – both extension slabs will have a mix of PIR and EPS. The bungalow floor has been dug up, hardcore is down and I am ready to fill that with EPS. The extension slabs both have SIPS sitting on blockwork, with cold-bridging around the sole plate best mitigated with marmox block beneath and external insulation on outside SIP wall (see pic). No feedback required on that please! : ) I just need a sanity check on the slab insulation please: Bamboo flooring 80mm meshed concrete with UFH (with 25mm EPS upstands) DPM 100mm PIR 160mm EPS Radon barrier (lapping with DPC under sole plate) 225mm Existing piled slab A mix of PIR and EPS to attain desired u-value / get correct FFL height. My thoughts were that it’s safest to get PIR on top of the EPS away from piled slab in terms of moisture. I was also thinking the PIR is better at withstanding point loads from the mesh chairs/spacers that will keep the mesh elevated above the insulation. Should I wrap it entirely in polythene/DPM to prevent moisture travelling up into the PIR? I was just going to cover the top with DPM as it is foil faced. Or should I have EPS on top and PIR at the bottom? Or does it matter?? Feedback appreciated. OB
  3. Apologies about another "who shall I contact?) posting. Again, I just don't want to miss out on any obvious suppliers/merchants out there and as insulation is one of may main cost areas, I'm looking to get the best price I can....obviously. I'm looking to get a mix of EPS and PIR for under slab and slabs for in between rafters ("frametherm"). I've tried some merchants that people here have suggested before on ebuild including the following: Minster Encon SIG Ecclestone & Hart And a host of local merchants and online-only outlets (Less2build, InsulationGiant, Insulation Express). so far, some are double the cost!!! Any obvious ones worth trying please? Again, I'll post my results on here for future readers to try too! Thanks.
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