Asphalt adhesive and its stickiness..

[Kalmarkille]

I'm applying the roofing felt on our Attefallsstuga, and tried the first day with a can of roof adhesive. It was the stickiest thing I've ever worked with, and I could barely spread it with a spatula even though I let the can sit in boiling water for an hour and then tried to stir it.

Now - to make my life easier - I thought I'd buy these instead https://www.byggmax.se/asfaltklister#1252=55156.

My question is: is it really possible to get the goo out of an even narrower tube than an open can? It also says in the instructions for these that you should spread the mass with a stiff brush or spatula...just like it said for the can?

 

[Jonatan79]

Answer YES! Buckets are desert! You can preheat a little if it's chilly outside.

 

[Kalmarkille]

Answer YES! Buckets are desert! You can preheat a bit if it's chilly outside.

- Okay, so it is more fluid in the tube than in the jar then? (which I also preheated... with half-decent results)

 

[Jonatan79]

- Okey, so it's more fluid in the tube than in the jar then?
(which I also preheated...with mediocre results)

Yes, indeed. Completely different

 

[Jan_G]

And attaches completely differently. The goo in the jar grips instantly, whereas the tube's "dritt" can take up to a week. If the paper is at a good incline, the tube is unfortunately not a good tip. Works fairly well on underlayment paper that is nailed. But don't drive any nails into the surface paper... ;-)

 

[Kalmarkille]

If the roofing felt is at a good slope, tube is not a good tip,

- Isn't the best condition for the tube adhesive precisely that the roofing felt has a good slope?
Or do you mean that it works worse with a steep roof angle...if so, why?

 

[Jan_G]

Tube adhesive is so diluted with solvent that it takes quite a while before it grips.
The surface paper will simply slide away from you.
I have just used 8 tubes on my roof on the underlayment in valleys and it barely sticks. Had to apply pressure for several days.

 

[Kalmarkille]

Tube adhesive is so diluted with solvent that it takes a long time before it grips.
The surface felt will simply slide away from you.
I have just used up 8 tubes on my roof on underlay in valleys and it barely holds. Had to put pressure on it for several days.

- Slide away? The felt is nailed at the top edge and overlapped by the next one, which in turn is overlapped and so on until the ridge felt finally covers.

 

[Jan_G]

Hmmm.
Surface felt is laid from the ridge downwards, i.e., vertically on the roof. Not horizontally.
We always nailed the end of the roll when we glued the surface felt. 3 nails so that it wouldn't slip while the glue cooled. But if you let a sheet hang with that goop/lubricant that I bought at Byggmax, the felt is likely to tear and slide down.
No, use pre-glued felt and heat it in place with as few nails as possible. Or why not shingles?

 

[Stuff]

Hmmm.
Surface felt is laid from the ridge and downwards, i.e., vertically on the roof. Not horizontally.
We always nailed the end of the roll when we applied the surface felt. 3 nails so that it wouldn't slip while the adhesive cooled. But if you let a strip hang with that goo/lubricant that I bought at Byggmax, the felt is likely to tear and slide down.
No, use pre-glued felt and burn it down with as few nails as possible. Or why not shingle?

No/Well. You should follow the manufacturer's instructions, nothing else.
At least if you want to be able to claim some form of warranty.

Mataki felt with a ready adhesive strip that I laid on the garage should be laid horizontally. Starting with the strip closest to the eaves and then overlapped by the next strip until you reach the ridge.

 

[stugfar]

Regarding laying surface felt, it may depend on the roof pitch. Clearly, you should follow the instructions, but I seem to recall that Trebolit, or was it Mataki, mentions that it can be difficult to lay the surface felt horizontally when the roof has a steep pitch, as the strip can easily slip down in the middle. Increases the risk that you won't get the strips straight and tight.

Regarding asphalt adhesive in a bucket, I've used a heat gun when it's been too cold. I guess a water bath is not enough.

 

[Kalmarkille]

Speaking of laying the surface felt, it can depend on the roof pitch. Of course, you should follow the instructions, but I seem to recall that Trebolit, or was it Mataki, mentions that it can be difficult to lay the surface felt horizontally when the roof has a steep pitch, as the sheet can easily slide down the middle. Increases the risk that you won't get the sheets straight and tight.

Regarding asphalt glue in a bucket, I have used a heat gun when it's been too cold. I guess a water bath isn't enough.

- I roll out the roofing felt, align it straight and set a few nails at the top edge with maybe a meter in between. Then I pull/straighten it from one end and place a nail closest to the roof edge. Then do the same on the other side.
Straight and simple to nail down the rest.
I have actually never seen roofing felt laid vertically.