Tape for outdoor drywall

[anton1048]

Hello! I'm in the process of installing outdoor gypsum boards. There will be some cut seams which I assume should be taped, as well as cutouts for windows. What type of tape is suitable? The only tape I found at the hardware store was a green foil tape from TESA (60077). From what I understand, I should ideally have a diffusion-open tape that "matches" the outdoor gypsum. Can I use the non-breathable foil tape that I bought, or should I look for something else?

 

[Rickard.]

Green age-resistant tape or equivalent in another color is totally right.

 

[Aunty]

Green age-resistant tape or equivalent in another color is completely correct.

No, you must absolutely not use green tape.
You should, as you say, use a vapor-open tape.

 

[boohoo]

If you want to use diffusion-open tape, there's Aero T or alternatively, Siga Wigluv. Both are expensive as sin.

Of the two, I personally use Wigluv. I prefer it.

 

[useless]

Why does it absolutely have to be a diffopen tape? That small percentage of the surface that is taped surely has no significant impact on potential moisture transport?

 

[Aunty]

Why must it absolutely be a breathable tape? The fraction of the surface that is taped probably has no significant impact on potential moisture transport.

Sure, but with your argument, you might as well seal windows with dense materials or tape on two sides as well; it's such a small area of the total facade.

 

[Rickard.]

no, you absolutely must not use green tape.
you should, as you say, use a diffusion-open tape

According to which major drywall manufacturer?

Please correct me if I'm wrong, but both Norgips and Gyproc's own tape are basically the same type of tape, even if they might have something special making them particularly suitable for their exterior drywall (impossible for me to know).

 

[Aunty]

According to which major plaster manufacturer?

Please correct me if I'm wrong, but both Norgips and Gyproc's own tape are basically the same kind of tape, even if they may have something special that makes them particularly suitable for their outdoor plaster (impossible for me to know)

sat in on many projects and attended many inspections with moisture consultants considered among the sharpest in Sweden and often there have been remarks on this

 

[Rickard.]

sat in on many projects and attended many inspections with moisture consultants considered among the sharpest in Sweden and often they have remarked on this

So you can't use joint and sliding profiles either because they are diffusion-tight? Or do you assume they are sufficiently leaky?

 

[Aunty]

So you can't use the extension and slide profiles either because they are diffusion-tight? Or do you expect them to be sufficiently leaky?

how many percent tape is okay and not okay for you?
5% tape, 20% tape or even 80% tape?

 

[Rickard.]

how many percent tape is okay and not okay for you?
5% tape, 20% tape or even 80% tape?

As much as the manufacturer's installation instructions show.

 

[Kaschsten]

how many percent tape is okay and not okay for you?
5% tape, 20% tape or even 80% tape?

Come up with something that can support your claims instead of being snarky

 

[Aunty]

As much as the manufacturer's installation instructions show.

you can't just follow the installation instructions and think you meet all the regulations, that's the ABC.

But sure, you can do as you like, but it's strange that all major construction companies, moisture consultants, inspectors say otherwise.

 

[Aunty]

Come up with something to support your claims instead of being arrogant

Why is it that I have to prove something and not you who says the opposite? It is well known that you don't install two vapor tight materials adjacent to each other, why that needs to be discussed here is unnecessary.

How do you install windows? Do you install a vapor tight seal on one side and vapor tight tape on the other side? No, of course not, so why doesn't the same rule apply here?

 

[Rickard.]

you cannot follow assembly instructions and think that you meet all regulations, it's essential.

Sure, you can do as you please, but it's strange that all major construction companies, moisture consultants, and inspectors say otherwise.

If you buy from serious players on the Swedish market, the assembly instructions always follow at least ama hus and often "more." Following the assembly instructions when using a product as intended is the safest way to get it right, but there are, of course, special cases.

Your other claims are wrong and, at best, extremely exaggerated; I cannot recall seeing diffusion-open tape at any time, not even on multi-million dollar projects that were certainly not built by small-time operators.