Roof insulation
Hi, I'll do ceiling, the idea is to put glass wool on the ceiling too (apart from the insulation under the veneer).
As far as the sheet goes, aluminum foil acts as a vapor barrier, so I understand that it is indispensable in either case, although it is rare that Isover indicates that this layer is placed down and with Isolant going upwards .
yes. It is likely to be more acoustic and if it is in sight the glass wool at the joints has better termination. Another advantage could be its useful life but I do not think it is decisive when choosing. I would not put both, I would consider it an unnecessary excess
The subject is that originally I wanted to put a 100 mm glass wool, as used in the steel framing houses, but seeing that it is not easy to get, I thought of putting 2 layers of 50 mm, a Silver Rolac and another common one little more economic.
The question is whether the Rolac should be placed just between the straps and the plates (with a plastic mesh bra and reinforced with some crossed wires) and the other glass wool on the ceiling, so that when heating in winter should not to heat without wanting that space that is between the ceiling and the sheet.
What do you think?
Thank you for your comments Ricardo. Now I turn everything, starting with the subject screws, everyone tells me that just use long screws on the back of the sheet, you say that this way you got water?
Using EPS instead of glass wool seemed cumbersome to me because there is no OSB or support machimbre, I can not imagine how you hit them, edge with edge? And go between straps cutting the EPS according to the separation of these or go from wall to wall above the straps? Or on the ceiling? Will you have photos to understand it better?
Regards!
Are the plates going to be mounted on U or C profiles of sheet metal or pipes? I mounted them on profiles of C plate of 6m light, these before uploading the paint (two hands) of liquid asphalt (to avoid oxidation) there are some that come galvanized but are expensive.
The insulant blanket has the same width as the sheet or a little more, so I pulled the roll from end to end (to be tightly stretched) and then the top plate put screws on the tips so that the blanket does not run and then I put the rest. The next sheet the same trying to fill the blanket on which was already placed.
Unfortunately I did not take photos of the job because it was an emergency (a tornado flew a neighboring roof and broke my spout 86, a disaster imagine all the furniture wet, etc.) opted for the sheet for the fast assembly, but did not want to suffer the subject of the condensate drip. But I will try to be as detailed as possible if it serves my experience. I'm not a techista, so all advice is good.
Hi, the problems with the screws is that it would have to put a support in each channel where you are going to drill (something quite uncomfortable, at least for me) but if you want to tighten well, the plates will be abolished (and that I bought trapezoidal cincalum of more thickness). On the contrary in the garage, I put short screws in the lower part of the sheet and I was able to tighten well without danger of dent. The two are over five years old, in the garage I did not have a leak and on the roof of the house because of those dents I had to seal each one of the screws (ONE BIRTH)
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