Passive Slab - Waste EPS

[Barney12]

Hi All

 

I hadn't even begun to comprehend the volume of waste polystyrene that would be generated from the construction of our passive slab.

Putting it skips seems crazy (and expensive).

I just wondered how others have disposed of it?

[ToughButterCup]

Popping into our flat roof and Piggery roof. We might be able to line the container with bits of it. I have created a separate EPS store and I'm saving every last bit. 

I have @TerryE and many others to thank for the tip.

Ian

[joe90]

Pop it into a garden shredder and sell it as eps beads?

[Ferdinand]

We had a thread about PIR here, and some of it may be transferrable:

 

Insulate around the swimming pool :-).

 

F

 

[Ferdinand]

Can we find a way to use lots of this?

Can it be put into some sort of cover (mattress cover? sack? packaging for a tall thin item that is common?) and put it in the loft for insulation? Does anyone still use paliasses?

 

Surely there are cheap covers or bags we all use that would do it?

 

Potential for a service? Suspect it is too low value itself.

 

Ferdinand

Edited May 11, 2017 by Ferdinand

[Onoff]

31 minutes ago, Ferdinand said:

Can we find a way to use lots of this?

Can it be put into some sort of cover (mattress cover? sack? packaging for a tall thin item that is common?) and put it in the loft for insulation? Does anyone still use paliasses?

 

Surely there are cheap covers or bags we all use that would do it?

 

Potential for a service? Suspect it is too low value itself.

 

Ferdinand

 

I think you'll find the "cover" you're refering to is called a bean bag!

[Ferdinand]

47 minutes ago, Onoff said:

 

I think you'll find the "cover" you're refering to is called a bean bag!

 

OK.

 

Need a long, thin bean bag for about £2 that will go through a loft hatch.

[dogman]

we skipped quite a lot but kept anything usable. mbc did say they would take any whole sheets and corners. I suspect that between all the builds on here there is enough waste to build a decent sized house base.

[Jeremy Harris]

The 100mm of EPS insulation in my garage roof is just left over sheets from the foundation.  Combined with 150mm of rockwool in the walls it seems to do a good job of keeping the garage warm in winter and cool in summer.

[TerryE]

I gave some away to a friend to put under his garage slab, and used a bit myself.  I've still got a couple of pieces left that we're hanging on to for the time being, just in case.  We've had to dump very little. 

[Nickfromwales]

What consideration should we apply here to its effects when subject to fire? I'd rather bin it than fill my attic with it TBH.

[Ferdinand]

Just now, Nickfromwales said:

What consideration should we apply here to its effects when subject to fire? I'd rather bin it than fill my attic with it TBH.

 

I am not sure what the requirements are re: fire etc. Is it required to be encapsulated?

[Onoff]

17 minutes ago, Nickfromwales said:

What consideration should we apply here to its effects when subject to fire? I'd rather bin it than fill my attic with it TBH.

 

+1..... and that's coming from ME!

[Bitpipe]

I still have three whole slabs (1.2x2.4) of 200mm EPS70 and two almost whole slabs left after doing the basement. That's after putting a layer under the garage raft foundation too.

 

I took two jumbo bags of offcuts down to our local recycling centre, went into the general waste hopper. Might stick the rest on free cycle - too bulky to go into the garage roof void.

[Nickfromwales]

13 hours ago, Ferdinand said:

 

I am not sure what the requirements are re: fire etc. Is it required to be encapsulated?

I don't mind it under my feet ( under slab ) and I'm of mixed emotions when it's behind plasterboard as IWI, but after that I don't want it anywhere, regardless of whether it's 'bagged' / other.

The stuff is simply horrendous when it burns so I think this thread should focus more on where NOT to put it, and to reiterate its destructive qualities when intoduced to the likes of pvc. 

[Jeremy Harris]

In our case it's effectively encapsulated in the garage roof, as it's between the ceiling and the 18mm T&G OSB floorboards above, cut to fit between the 220mm deep ceiling joists.  The garage is more of a workshop than a garage, and there will be other far more flammable stuff in it a lot of the time.  It's detached, and at the opposite end of the plot to the house, and well away from any neighbours, so if the worst came to the worst then any fire would be isolated.  There's no source of ignition near the insulation, either, as all the wiring is surface mounted in conduit, inside the workshop itself..

[Nickfromwales]

I'm more focussed on its use in habitable dwellings , ( and my shed will also have a lot of EPS in it ). 

[Ferdinand]

What is the insulatory effectiveness of shredded or broken up EPS sheet in concrete slabs?

 

I can't see BCO allowing such in any regulated slabs, but for conservatories outside the thermal envelope, garages or workshops I could see an application. Or greenhouses.

 

Ferdinand

[Barney12]

I've been thinking.......(dangerous!)........

 

We've got a lot of levels to build up for patio areas etc. Is there any reason why I can't just bury it to save on importing crushed concrete/hardcore? As long as I use the flat pieces it seems to have a quite incredible compressions strength. Perhaps at least 300-400mm burial depth? 

 

I guess its its not that environmentally friendly but then we've just put several hundred square meters down for the slab anyway! So al it to more under the ground hardly makes much difference. 

[Carrerahill]

On 11/05/2017 at 12:11, Barney12 said:

Hi All

 

I hadn't even begun to comprehend the volume of waste polystyrene that would be generated from the construction of our passive slab.

Putting it skips seems crazy (and expensive).

I just wondered how others have disposed of it?

 

You could dissolve it. Reduce it to a little bit of goo, bag it up and bin it. There is stuff you can buy to do it, but it's just a solvent (cough Petrol cough), acetone works too.

 

Building waste is a massive issue and one that on commercial projects annoys me when you see 10-15 sheets of brand new Celotex in the skip!

 

 

Edited May 12, 2017 by Carrerahill

[Barney12]

11 minutes ago, Carrerahill said:

 

You could dissolve it. Reduce it to a little bit of goo, bag it up and bin it. There is stuff you can buy to do it, but it's just a solvent (cough Petrol cough), acetone works too.

 

Building waste is a massive issue and one that on commercial projects annoys me when you see 10-15 sheets of brand new Celotex in the skip!

 

 

 

Now why didn't I think of that!!! And I just happen to have access to large quantities of cheap "gun wash" (recycled cellulose thinners). 

[Ian]

44 minutes ago, Barney12 said:

I've been thinking.......(dangerous!)........

 

We've got a lot of levels to build up for patio areas etc. Is there any reason why I can't just bury it to save on importing crushed concrete/hardcore? As long as I use the flat pieces it seems to have a quite incredible compressions strength. Perhaps at least 300-400mm burial depth? 

 

I guess its its not that environmentally friendly but then we've just put several hundred square meters down for the slab anyway! So al it to more under the ground hardly makes much difference. 

the main issue is the potentail for rising water levels if you are using it externally as it will want to float.

[Bitpipe]

38 minutes ago, Ian said:

the main issue is the potentail for rising water levels if you are using it externally as it will want to float.

 

These guys did not get the memo...

[Onoff]

Under a patio it won't be permeable that's for sure. 

[TerryE]

4 hours ago, Carrerahill said:

You could dissolve it. Reduce it to a little bit of goo, bag it up and bin it

 

You've been watching too much Breaking Bad!