I don't understand why people worry about whether the tape stays on if they're using SITAC-approved age-resistant tape. As far as I know, it's suitable for passive houses, so it should suffice for your presumably "normal" constructions.
In cases where it is applicable (such as ceilings that need spacing or the seam between roof plastic and wall plastic), one obviously strives to overlap the plastic with two longitudinal spacings.
Continuously applying on the walls (which hardly contain any seams) seems to me personally—as a complete layman—to be overly paranoid. Why not just use triple plastic instead?
In cases where it is applicable (such as ceilings that need spacing or the seam between roof plastic and wall plastic), one obviously strives to overlap the plastic with two longitudinal spacings.
Continuously applying on the walls (which hardly contain any seams) seems to me personally—as a complete layman—to be overly paranoid. Why not just use triple plastic instead?
mattias78, read my description in post #15 and you will see that you can choose to seal the seams with a thin strip instead of taping them.
The problem with tape, as far as I understand, is that the adhesive itself is not age-resistant and you don't know how long the function of the tape will last.
The problem with tape, as far as I understand, is that the adhesive itself is not age-resistant and you don't know how long the function of the tape will last.
So if SITAC has approved a tape as age-resistant, would the approval only apply to the "plastic strip" then, and not the adhesive...?
See e.g. approval document for T-Flex where SITAC has assessed the age resistance as "at least 50 years". (Other approvals can be searched on SITAC's website)
See e.g. approval document for T-Flex where SITAC has assessed the age resistance as "at least 50 years". (Other approvals can be searched on SITAC's website)
Yep! That's what's claimed in some old threads here on the forum. What do I know...mattiasj78 said:
http://www.byggahus.se/forum/isolering/75160-aldersbestaendig-tejp-som-lossnar.html
http://www.byggahus.se/forum/isolering/50118-aldringsbestaendig-tejp-suger.html
I tape and install clamping strips where needed, but I always try to make as few joints as possible, then you don't have to worry so much. As for the tape, after first using Stockviks' aging-resistant tape for diffusion plastic, I find T-flex to be much better; I use it at work, and it sticks so well that it sometimes drives you crazy, but it doesn't come off.
Have been taping with T-Flex throughout the entire house construction, sticks like a rock. Now the rolls were out when it was time for the garage and I skimped and tried a couple of cheaper tapes. The adhesion can't be compared at all. However, I've only found it at the local hardware store as a special order, they're charging over 260 SEK for a roll! Has anyone found it cheaper somewhere? I see that it seems to be the same product that's called Tacoflex in Germany, where it costs maybe half. Any webshop perhaps, I haven't been able to find one myself.
Currently working on decorating my upper floor and struggling with tape (Paroc's own and Tesa). What I've noticed is that the tape comes loose over time if you pull it even slightly at a corner, or if the plastic isn't completely flat. I have thought that the tape joints will be clamped between my outer and inner insulation (195+45) when everything is in place, but it requires precision.
What I find to be the biggest issue is around beams that break the vapor barrier. Here, it's a real hassle, and it tends to come loose in some areas after a week or so. I've tried working with Paroc's black sticky sealing tape, but I mostly just end up sticking it to myself.
What I find to be the biggest issue is around beams that break the vapor barrier. Here, it's a real hassle, and it tends to come loose in some areas after a week or so. I've tried working with Paroc's black sticky sealing tape, but I mostly just end up sticking it to myself.
Note that many age-resistant tapes are only approved for splicing plastic and not plastic to wood or plastic to metal. I only know of the aforementioned T-emballage T-Flex which is approved for splicing with other materials.MagnusRö said:
I have applied duct tape to the wood as it adheres well. Then I tape with an age-resistant tape against the outside of the duct tape. It works quite well, but the age-resistant tape peels off the plastic if it does not lie completely flat.
...I read this thread way too late. I have worked with Tesa 4668 and thought it worked okay. But unfortunately, I have stapled it to materials other than plastic, and that might not have been so good, as I now understand. Now I have to go over it a couple of times with the stapler and see what I can fix afterwards. Around the window, however, it's not too late for framing...
The only thing that works is t-flex. Tesa's tape doesn't stick as well as it should. I don't understand how it's approved. The adhesion is somewhat acceptable if you are very meticulous, but only on flat surfaces, plastic to plastic, and for the ceiling, the taping must be done under a sparse panel. It doesn't work at all against, for example, wood or around pipes, electrical conduit, or anywhere else where the tape needs to be flexible.
T-flex is very expensive (I've used up 60 rolls), but I would say it's not an option to choose the cheaper Tesa tape. This is definitely the wrong place to save money. If you get any leakage, you will have problems with condensation on top of the insulation during winter, which then freezes into ice and melts, and finally settles on top of the vapor barrier as water.
Unfortunately, there are far too few builders using t-flex due to the price.
T-flex is very expensive (I've used up 60 rolls), but I would say it's not an option to choose the cheaper Tesa tape. This is definitely the wrong place to save money. If you get any leakage, you will have problems with condensation on top of the insulation during winter, which then freezes into ice and melts, and finally settles on top of the vapor barrier as water.
Unfortunately, there are far too few builders using t-flex due to the price.
As far as I know, the approval for that tape only applies to splicing plastic to plastic.Himneck said:
Anyone else compared k-flex and T-flex and can agree that they seem to be the same manufacturer?
Found this seller in Germany: http://www.ebay.de/sch/Dampfsperren-/124999/i.html
Has quite a few different tapes at various price ranges. Tacoflex for 100 kronor, for example.
This one should work, right?: http://www.ebay.de/itm/0-42EUR-M-1-...t=DE_Heimwerker_Baustoffe&hash=item5646ec16e7
Has quite a few different tapes at various price ranges. Tacoflex for 100 kronor, for example.
This one should work, right?: http://www.ebay.de/itm/0-42EUR-M-1-...t=DE_Heimwerker_Baustoffe&hash=item5646ec16e7
Here are some more from Germany: http://www.ebay.de/sch/i.html?_nkw=...r=true&_nkwusc=klebendband+dampfbremse&_rdc=1