You're bang on with that point Biff, LOL! It does massively block mobile phone signals! I've used it on two jobs, and it cost me a fortune in missed calls.
Dave
posted on 04-09-06
Martian,
Do you work for Building Control then?
Martian
posted on 04-09-06
Dave,
I see no postings from you except to imply that I work for a competing insulation manufacturer.
The only possible reason for such a line of attack is as a precursor to claiming that my reason for opposing the multifoil machine is personal gain. Now that is not very nice is it?
You want to establish exactly who I do work for but I do not think that you deserve a reply.
1. Because I have tried to demonstrate my knowledge of the issues involved with both building and of physics by my postings. Knowing who I work for contributes nothing to the debate.
2. Because I don't trust you or think that you have earned an answer.
Maybe if you post any interesting information and tell me who *you* work for I will reconsider.
Martian
posted on 04-09-06
Paul,
<<< I will explain the technical descrepancies over the weekend with regard to the LABC Guidance Note. >>>
WEEKEND HAS GONE. STILL WAITING ........
Don
posted on 04-09-06
I am amazed to see this debate still going on. I would have thought the traditionalists would have won game set and match by now.
Some time ago I published my own data from some controlled hot box experiments on Multifoil vs Celotex. This convinced me that Multifoil is a big con and there was no-way was I going to use if for insulating my barn. After publishing the data, Tony suggested I might try some newspaper in the hot box test. I have now done that. In fact I used 12 layers of paper to simulate the 12 layers found in the multifoil I was thinking of using. Not surprisingly the paper was not as good as the foil, but it was close!! I then put a single sheet of aluminium foil either side of the newspaper and repeated the experiment. Lo and behold the insulation profile was virtually identical to the multifoil trial.
If anyone is really interested you can see the results on the following web blog:-
Having thought about the multifoil concept again, it seems obvious to me that it will not work as the manufacturers claim. You only need 2 layers, one on the inside for heat retention, and one on the outside for coolth retention. Since the aluminium foil is supposed to reflect 97% of radiant energy, (the other 3 % being adsorbed) then there is no benefit of having another 10 layers on the inside. Any adsorbed energy will not be radiated through the foil but will be conducted away to the nearest weak spot (a joint, or compressed region for example). The inner foil layers will at best be redundant and at worst increase the conduction of heat away from the room.
By the way, I do not work for any supplier I am retired physical chemist with only my own home to build. But I think I might set up a business in new uses for recycled newspaper!
PS: Sorry Tony I had to use The Times in the end.
Martian
posted on 05-09-06
Unfortunately I haven’t had chance to detail the technical discrepancies within the LABC Technical Guidance note as my wife gave birth Sunday night some 4 weeks early. As soon as I get a chance to explain in detail I will.
I trust the manor in which you state the weekend has gone doesn’t imply that I cannot explain these technical discrepancies ?
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