You're right, I hadn't realised how 'just' it is :-)
This is the Colchester one:
For Sheffield/surrounding just got some from:
Anyone know if Knauf has split into two companies/divisions, e.g. one doing PIR the other doing rockwool?
I thought I'd previously used their U-value calculator for a new flat roof, but now it only seems to offer rockwool, rather than PIR, which results in an insulation depth of 220mm vs 140mm for PIR to achieve 0.16U
No idea, but often those kind of websites aren't very good at telling you the full range.
I'd use
Theo
Not just the U calculator, the whole Knauf website has no PIR listed under products (except for plasterboard/PIR sandwich)
That's pretty good, shame my German isn't (yes firefox tranlate helps) I'm surprised the various single-ply membranes are there, but disabled, you'd think he could persuade (at least some of) the manufacturers to pay in order to have their products promoted?
Maybe worth paying for a couple of months ...
Thanks
If you sign-up for a demo account, you get a month free, and after that you can continue to use it evenings/weekends, so he's quite DIYer friendly.
Hmm, did Knauf sell straight PIR? Rockwool and plasterboard, but I don't remember Knauf branded PIR unless it was one of the minor brands like EcoTherm/Isotherm.
You can set the UI to English, it's just a few of the materials that aren't translated.
I think all the generic materials are available on the demo version, it's only the proprietary ones that are on the subscription version. eg 'PUR, foil faced' is free but 'Kingspan' is subscription.
If you want to produce drawings for building regs/etc approval you probably want the right material on them. If you're a DIYer who is just sticking a finger in the air then you don't care about that, you just want to know the difference between PIR and mineral wool.
If it really annoys you you can make a custom material from the numbers on the Kingspan datasheet.
Probably worth doing if you have a project on the go, rather than just kicking tyres on newsgroups.
Theo
I would have though that a spreadsheet and a bit of DIY would be adequate in most cases:
(and installation details will matter far more than a 0.02 u value difference)
U-value calcs are easy, but moisture calcs less so. ubakus will tell you if you're going to have condensation buildup in the middle of your stackup, which is something good to know when selecting materials. It's not just the permeability of the materials but the temperature at that point in the stack, which is a function of the outside temps, airflow and the U value - ie which of condensation and drying processes will win.
Theo
OOI, do you know how to input an air cavity?
various, stationary air (unventilated) or other materials with the same "wind" icon.
Yup fair points...
Although if you stick to the principle of making sure you have a vapour barrier on the warm wet side, that will help greatly in most cases.
Thanks!
The scaffolding is still up, so blocking the view. Front elevation looks like awkward sloping facia fixed over the protruding edge of the panels, then guttering fixed to that at an angle so much less than half round if full of rain water and excess will tip over the inside edge. I'd have fitted plastic wedges under the brackets so canted to the outside edge . The end elevation gabling, looks like an extra run of cement tiles with currently an awkward 1 to 2 inch wind-catcher overhang. Presumably a barge board going there later. The new tiling run is a perfect colour match but some upsetting in the layup, presumably slightly different profile/dimensions of tile. Without binocular viewing, not too obvious what has gone on there, I assume Clipper sawn at ground level rather than disc cutter at roof level.
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