Sacrificial wood for temporary roof

[LSB]

We are DIY Self building in 3 phases, over many years.

Phase 1 walls are finished with a temp roof, made from the old barn roofing sheets with the final posi joists as this is a separate roof.

 

We are now looking at doing the same for phase 2, but we don't want the final posi-joists as the whole roof needs to be done in one hit.

 

Does anyone know a good place to get 4*2 timber for joists that will ultimately become firewood.

they do need to be long long, one side is 4m and the other side 6m. 

I will need about 25 of each length.

These are partly to brace the walls until we are ready for whole roof and partly to allow us to store equipment which is currently in another part of the barn.

 

Any suggestions greatly received.

 

TIA Jill

 

[Nickfromwales]

8 hours ago, LSB said:

We are DIY Self building in 3 phases, over many years.

Phase 1 walls are finished with a temp roof, made from the old barn roofing sheets with the final posi joists as this is a separate roof.

 

We are now looking at doing the same for phase 2, but we don't want the final posi-joists as the whole roof needs to be done in one hit.

 

Does anyone know a good place to get 4*2 timber for joists that will ultimately become firewood.

they do need to be long long, one side is 4m and the other side 6m. 

I will need about 25 of each length.

These are partly to brace the walls until we are ready for whole roof and partly to allow us to store equipment which is currently in another part of the barn.

 

Any suggestions greatly received.

 

TIA Jill

 

If your proposed future roof needs parallel chords of a posi joist, at lengths like 6m, then you have zero chance of running a 4x2 for that distance, singularly, as nobody stocks them afaik; they’d be too weak also. 

For my current client I have had to sister 2x 4x2’s to get beyond 3.6m;  single 4.8’s are possible, but are weak and useless. For s roof, forget it basically. 

 

Posi joists are cheap enough, so wasting time, effort, money the way you propose is a bit ‘non cost-effective’ and methinks wholly impractical. 

[Redbeard]

Agree with @Nickfromwales, but if you do still want an 'interim' solution what about the longest 50x50 sawn you can get - probably 4.8 or 5.1 x 2 with ply or OSB between, as 'quasi I-beams'? 2 x 2 will come in useful in its own right or glued and screwed as 4 or 6 x 2.

[LSB]

WE are vey slow building, think Pocster 🙂

 

So, although temp for storage realistically it needs to last probably 2 year.

 

this shows how the roof was done previously when built in the 60's.

 

We will be using the same roofing sheets, but the wood is pretty much knackered.

 

We just want to replicate this as cheaply as possible for dry storage, the roof material is very light as just rain cover.

 

This is all held together with joist hangers but we were hoping to do wall plates and joists.

 

The issue is that roof one (not there in this picture) is 4.2m including the walls and roof 2 is 5.4m.

 

For what we need we are happy to 'join' joists to make the spans from 3.6m sections, but that means for the phase we are doing we will need 64 joists plus wall plates which potentially might not survive being left for years.

 

Phase 3, which is the bit you can see until the blue barrel behind the wheelbarrow will not have a temp roof.

Once that is finished then the whole lot will be done properly with the posi-joists.

 

 

 

[Nickfromwales]

4.2 and 5.4 spans, or width?

 

If spans, then you’ll need minimum 5x2 even foe a temporary offering, or you could install a perpendicular ‘spine’ mid span made of 2x 6x2’s bolted together, then you can use 4x2 to span wall > spine > wall easily.

 

By the time you sheath this, minimum 18mm OSB, there will be a lot of weight up there.

 

And most self builders mean 3 or more years when they say 2 .