| viharnik5. 11. 2015 16:48:40 |
No, like this, so we don't talk about attics in vain, I have reliable information (of course, if someone follows the same path in attic building, because for dumb heads exploiting the forum, no) from first hand.
I asked Knauf's main technical advisor in Ljubljana about hangers, where and which ones are used.
He said that hangers are of several types and made in multiple types so that they can be selectively used, depending on the type of attic, each specific on its own and each one needs individual attention and adaptation to the best way of building, there are no written rules here, some healthy farmer sense - own judgement is needed. He said that on roof slope constructions both lateral anchor hangers and also fully equal in function and load the "controversial" direct hanger are used. Intermediate distances of profiles for both are installed from 40 to 50 cm, difference between German and EU general norms. Deviation occurs due to installation of different thickness of gypsum boards and coatings. But he says that for 1.2 cm thick standard gypsum board after installation we can stick to up to 50 cm spacing, if less, also good. A very important phase in attic building is the final vapour-impermeable foil e.g. Knauf LDS 100 or 1% permeable (Tyvek)...?, so that joints are really well sealed with quality bandage tape and additionally ends that hang into the interior with Knauf glue. For Tyvek, which lets through 1%, he says it is just a fashion hype, otherwise good companies that promote their novelty, that living in the attic is healthier and that it drains possible elevated high moisture in living spaces. With this the product is nothing else but more expensive, but from insulation perspective and durability it has no advantages, rather disadvantages, as he says. The inner insulation space between foils must therefore be fully vapour-permeable from the side of living spaces, which allows the insulation to remain in its original dry state and thus perform its function. Conversely, any moisture causes first condensate, then water droplets appear that soak the insulation, also the rafters around, which consequently reduces the insulation power and the lifespan of the insulation itself, damn. Any moisture anywhere in building guidelines is death for living and the building material itself.
Regarding hangers it is really a whole circus, since even the said building material sellers say twice differently. Finally also at mine, when I asked them again  . For wall-hanging hanger on a rod, with which a lower level ceiling with insulation is made, you can't miss.
The technical advisor, who also goes to the mountains, told me quite a few things that no one will tell us consumers, neither companies that produce material nor shops that sell material. Everyone just wants to achieve their goals in the shortest and easiest way, the buyer is ultimately left to either an experienced top master who over the years knows how the installed material behaves and functions or to trust in some company at own discretion, which goes: May we live and see  .
|
|