Turn on rule on truss to get it level?

[luckmålare]

I have almost removed all the hardboard for the air gap.
But now I need to attach a piece of wood to the rafters to make room for the 145 insulation.

But how on earth do I get everything straight when it's at an angle?

I've been considering buying this: https://www.verktygsvaruhuset.se/product/hultafors-krysslaser-h360g-gron
I hope it can be adjusted at an angle

To be able to set it at the correct angle and measure my way to 145 so I know how to split the new piece of wood

Or how do you solve it?

 

[jonaserik]

Cross lasers are available at cheap department stores and are quite satisfactory.

 

[Matti_75]

Bricklayer's string

 

[fribygg]

Murarsnöre

The combination of murarsnöre, straightedge, and spirit level usually works excellently.

 

[luckmålare]

There are cross lasers at cheap department stores that work just fine

The cross laser I have, I can't angle; it only outputs horizontally and vertically.

 

[luckmålare]

Murarsnöre

How do you think then?

Tried to set one up, measured out 145 on the first and last roof truss.
On one of the ones in between, I got 164mm while the first and last were 145.

Or I did something very wrong 😑

 

[Kardan79]

What are you thinking?

I tried to set one up, measured 145 on the first and last roof truss.
On one of the ones in between, I went 164mm while the first and last were 145.

Or maybe I did it very wrong 😑

It's almost impossible to go wrong with a string.

What exactly is your problem?

But how in the world do I get everything straight when it's at an angle?

Is it that the underside of the roof trusses is not level and/or at different heights?

I can't angle the cross laser I have, only get horizontal and vertical.

That's usually how they work...

 

[luckmålare]

You can't really go wrong with a string.

What exactly is your problem?

Is it that the underside of the rafters is not level and/or at different heights?

That's usually how they work...

They are not level on the underside, when the carpenter was there to reinforce them, they cut the battens and mounted them up. Now these vary between 110 to 128mm. The insulation is intended to be 145. So I need to add another batten to get everything level.

So they are not level and

 

[Kardan79]

They are not level on the underside, when the carpenter was there to reinforce them, they sawed timber and mounted it up.
Now these vary between 110 to 128mm. The insulation is intended to be 145. So I need to add another piece of timber to get everything level.

So they are not level and

So it's the underframes that have been reinforced, and now you want to build on them further? Set the laser at a suitable height and then measure between the laser and the underarm with a folding ruler?

 

[luckmålare]

So, it's the subframes that have been reinforced, and now you want to build on them further? Set the laser at a suitable height and then measure between the laser and the subframe with a folding ruler?

Correct,

But my laser, the one I have today is a Bosch, unfortunately, it can't tilt in a straight line. So I'm considering the Hultafors I linked earlier. If it could work, to use it on a tripod and then aim for 145.

 

[Kardan79]

Correct,

But my laser, the one I have today is a Bosh unfortunately it can't be angled. So I am considering the Hultafors I linked earlier. If it could work, to use it on a stand, and then measure up to 145.

I unfortunately do not understand what you are trying to do.

Are you going to have a sloped ceiling? Otherwise, you set the laser at an appropriate height (starting from the lowest point of the roof trusses) and use a regular tape measure to measure between the laser and the underside of the roof trusses.

I don't know if there are line/cross lasers that can be locked, so they don't automatically go level/plumb. I've never seen such, but I also haven't been looking for them.

 

[luckmålare]

Unfortunately, I don't understand what you're trying to do.

Are you going to have a sloping ceiling? Otherwise, you set the laser at a suitable height (based on the lowest point of the rafters) and use a regular measuring stick to measure between the laser and the bottom of the rafters.

I don't know if there are line/cross lasers that can be locked so that they don't automatically align horizontally/vertically. I've never seen such, but I also haven't looked for them.

Good evening

Ordered a new laser, so I tested it today.

Took a 145 piece up against the masonite to find the right measurement with the laser. Cut the piece to 63mm. Mounted it, and it turned out perfectly. Was very satisfied.

BUT

Then I did the same on the next one, got it to 65mm to the laser beam, cut and mounted it in level with the laser.

But when I then took a scrap piece of 145mm (which the insulation will be later), I noticed it's about 1cm from the "insulation" to the edge of the new piece.

So I checked some measurements, the one closest to the laser will be about 150mm, it feels like something is wrong somewhere. I sat for a long time thinking about what the mistake could be.

Talked to a friend, who suspected I might have been unlucky and started with the lowest piece, and that I should reverse everything with the laser. Will test that tomorrow.
Or what else could be wrong?
It's a Hultafors laser, which I mounted, and then turned into the correct position.

 

[Matti_75]

You know it doesn't level itself when you tilt it?

 

[egge80]

For that job, a mason's line is what you need, place the rule correctly on the two outermost rafters then stretch a mason's line, one at the top and one at the bottom, then install the others.

 

[Kane]

But my laser, the one I have today, is a Bosh which you unfortunately cannot tilt.

What do you mean by not tilt?