In what order do you lay tar paper and metal at the eaves

[Lilu75]

On the raw plywood, there is underlay felt YAM 2000 and on top of that, I have laid Base Plate. Over Base Plate, I have laid surface felt Glacier 3. Low-sloped roof. Condensation is entering under the plate, and the underlay felt is wet. Does it help to lay a roof edge strip in felt? And can it be laid on top of the underlay felt? Grateful for help

 

[Lassetasse]

Sounds like it's doing what it's supposed to? You place a strip under the sheet to prevent condensation from coming into contact with the wood.

 

[Rickard.]

You have done it in the correct order, but are you really sure that it is condensation and not some leakage higher up that is running down onto the underlay? I find it very unlikely that condensation can form on a base plate that lies directly against an underlay.

 

[Lilu75]

Sounds like it's doing what it's supposed to? You lay a strip under the sheet metal so the condensation doesn't come into contact with the wood.

So do you think the underlayment paper is enough? It's lying there and is wet. Or should I also lay a strip under the base flashing?

 

[Lilu75]

You did it in the right order, but are you really sure that it's condensation and not some leakage higher up that's running down onto the underlayment? I think it sounds very unlikely that condensation could form on a base sheet that lies flush with an underlayment.

Ok, will check again

 

[joakim_j]

How can you tell if the underlagspapp is wet if there is ytpapp on top?

 

[Lilu75]

How can you tell that the underlayment is wet if there's surface felt on top?

Good question! It started to rain before I had laid all the surface felt 😱 so I started working my way down again to see how much had gotten wet. When I got to the last strip where almost everything was dry, I saw along the entire sheet at the bottom, once again wet felt.

 

[Jansson69]

Do you have pictures for this doesn't add up?

 

[joakim_j]

Good question! It started raining before I had laid all the ytpapp😱 so I started working my way down again to see how much had gotten wet. When I got to the last strip where almost everything was dry, I saw wet ytpapp again along the entire metal sheet at the bottom.

I don't quite understand... Did you tear off the ytpapp you had laid because it started raining?

 

[Lilu75]

I don't quite understand... Did you tear off the roofing paper you had put because it started to rain?

I saw that rain had run under the roofing paper and thought it needed to dry up. It was very wet underneath. So I removed the roofing paper, yes.

 

[AndersS]

I place a paper strip about 30cm wide, eaves sheet on it, and then underlay felt that ends so that the edge of it is then covered with a few cm of the surface felt.

 

[plåtrickard]

I saw that rain had seeped under the surface paper and thought it must dry out. It was very wet underneath. So I removed the surface paper, yes.

But then it's not condensation...
It's not surprising that it runs on the underlay if it's not finished...

 

[Lassetasse]

How did you remove the roofing felt after you glued/nailed/screwed it in place?

I'm a bit concerned about the underlay paper...

I see now in your first post that you might not have laid any underlay paper against the sheathing except at the eaves flashing. It is usually recommended.

So; strip of underlay paper along the eaves, flashing, underlay paper on all exposed wood and a bit down on the drip edge, roofing felt over all underlay paper and down to the bend in the eaves flashing.

If the wood has gotten wet, it should be dried out to some extent before you cover it with felt again.

 

[Lilu75]

How did you remove the final roofing paper after you glued/nailed/screwed it in place?

I'm a little concerned about the underlayment...

I see in your first post that you might not have laid any underlayment against the sheathing except at the eaves flashing. It's usually recommended.

So; strip of underlayment along the eaves, metal flashing, underlayment on all exposed wood and a bit down onto the eaves flashing, final roofing paper over all the underlayment and down to the bend in the eaves flashing.

If the wood got wet, it should be dried out somewhat before you cover it with paper again.

I have laid underlayment on the entire roof.
I had nailed the final roofing paper and then I pulled the nails out again...

 

[Lassetasse]

Oh dear. Then the underlayment paper is perforated and thus no longer watertight.

I would probably recommend starting over with the underlayment paper. The alternative is to asphalt glue over all the nail holes...