Ideas please: how to fill this gap.

[ToughButterCup]

The angle of our rafter line doesn't match the angle of the built wall.

 

At one end, the bottom of the rafter is an inch or so higher than the wall, like this

 

and at the other end, the 'fit' is a bit better: but not ideal.

 

My question is; how best do I fill in the gap ?

 

Why did this happen?

My theory is that the steels company installed them with what some might call a light-hearted approach  to planned  dimensions. That meant the pitch of the walls and the steels does not match.

 

An appropriate amount has been deducted from their invoice.  Not so long ago I would have paid in full without question. Not any more.

 

 

[Mr Punter]

Am I looking at the top of a gable wall?  Why not just add some bricks or flat blocks on top where there is a gap?

[Declan52]

You could put insulation against the inside of the rafter and then back fill the rest with motar/concrete and smooth it of level with the top of the rafters. 

[ToughButterCup]

7 minutes ago, Mr Punter said:

Am I looking at the top of a gable wall?  Why not just add some bricks or flat blocks on top where there is a gap?

 

Yes, it's a gable.

Thanks both @Declan52 and  @Mr Punter

 

[Declan52]

All them offcuts that you have lying around will be ideal.

Don't really want to add full blocks as you want to maintain the insulation of that edge so by adding the insulation and some concrete you will be mirroring what's below.

[ToughButterCup]

19 minutes ago, Declan52 said:

All them offcuts that you have lying around will be ideal.

[...]

It is indeed an ill  wind that blows nobody any  good at all.... I saved these from the wall collapse

 

 

So, I'll just stick them together and  foam them into place  then?

[Declan52]

Yeah will be a bit of a jigsaw puzzle but will use them up. Then a bit of motar/concrete to keep them permanently there until you get felt/OSB on the roof.

[nod]

3 hours ago, recoveringacademic said:

The angle of our rafter line doesn't match the angle of the built wall.

 

At one end, the bottom of the rafter is an inch or so higher than the wall, like this

 

and at the other end, the 'fit' is a bit better: but not ideal.

 

My question is; how best do I fill in the gap ?

 

Why did this happen?

My theory is that the steels company installed them with what some might call a light-hearted approach  to planned  dimensions. That meant the pitch of the walls and the steels does not match.

 

An appropriate amount has been deducted from their invoice.  Not so long ago I would have paid in full without question. Not any more.

 

 

I would simply build it up between the two joists with a solid concrete block 

A simple way would be to pack it with insulation 

[Onoff]

How about....

 

1) Lay a sheet of PIR in there.

 

2) Cut some square holes in it similar to your blocks.

 

3) Fill square holes with concrete.

 

No idea of any benefit just sounds like fun...

 

[ToughButterCup]

1 hour ago, nod said:

I would simply build it up between the two joists with a solid concrete block 

A simple way would be to pack it with insulation 

 

Well, I've some spare blocks left over.

I could cut them to fit. Drill a couple of holes in the concrete that exists and then pop some rebar in there (so it's sticking up vertically). Then fit the blocks and concrete as normal.

 

A fair bit of work there, though..... 

[Dudda]

Don't bother with the blocks. Introducing an unnecessary cold bridge. Will you even see the gap below or are you having a service cavity or counter battens internally? You may not even have a gap after them. I'd do what Declan suggested and go with insulation offcuts, bit of foam and some mortar to hold them until the felt is on. I'd be sure to spend as little money and time on it as possible.

[nod]

On 20/04/2018 at 13:34, recoveringacademic said:

 

Well, I've some spare blocks left over.

I could cut them to fit. Drill a couple of holes in the concrete that exists and then pop some rebar in there (so it's sticking up vertically). Then fit the blocks and concrete as normal.

 

A fair bit of work there, though..... 

Yes Ian 

its a pain when you make extra work for yourself 

But really annoying when it is caused by others

[ToughButterCup]

Thought I'd bump this thread to show progress (only interesting in terms of how to solve this problem with Durisol ) and

to ask a question:

 

Do I need to put a bit of underboarding under the in-fill pieces of Durisol?

This is progress so far.... (have a look at the original image of the same area above)

( the top of the block is now 28mm or so below the top of the rafter verge so I can cap it off with 25mm of PIR and then felt and batten)

 

What interest me though is this gap....

 

The wall will be clad: the cladding sits on 50 by 50 battens and then there will be some standard cladding outside that: in other words the gap will disappear.

 

But the gap won't be sealed  (I suppose), so wouldn't it be a good idea to put some underboarding on top of the wall that's already built, but under the in-fill that I am about to fix into place with concrete? Once that's in there, that's it.

 

 

 

 

[Nickfromwales]

Is that all outside of your airtight layer? If so, EPS / foam ( or use PIR offcuts ) and move on. ?

[Mr Punter]

I would have just gone mineral wool and not faff around.