PIR insulation underfloor

[Smallfry]

Compared to concrete, looks cheap. Be interesting to see how it would compare to stone + handling, levelling and compacting.

You could also consider pricing a block and beam floor. If they come specced to take the loads you require.

I am considering all options ATM, but structural engineers have specified a raft foundation with deeper edges and lots of reinforcement, some of it 16mm, and using C32/40 concrete. I think this is an ar5e covering solution and completely OTT IMO. The building is sitting on solid chalk FFS

The garage ceiling/lounge floor above will be beam and block, divided down the centre, and the beams sitting on the lower web of a large steel. The whole thing it going to weigh at least 80 tonnes as it is.

 

[Smallfry]

@Smallfry is there somewhere nearby that's accessible for larger tippers to dump a stockpile?

A digger and 3-4t dumper would quickly shift it. Hell I had 20t of clean stone dumped on our drive as I took pity on the driver trying to reverse up our drive in pouring rain and the dark. Having to ferry it a hundred yards in the 2CX only took a couple of hours with the front bucket which isn't as big as your 3CX one.

Sadly not. One of the neighbours across the road with easy access to he horsey field has offered to take delivery of roof trusses, when the time comes, and I dare say she will allow the concreate beams for the upper floor, to be dropped there too, but she will definitely not want anything granular dumped there.

I guess I could hire a small tipper, but I do like the idea of the polystyrene.

 

[Smallfry]

if you want to save on concrete within the floor you can also use 2" carpet rolls as long as the cardboard is protected from the water advantages to tubing the floor you can use it as underfloor heating

and as you are adding a deeper layer it dosnt matter how thick the floor is

the pic shown is hollow core flooring used in high rise buildings and other applications


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Thread 'Insulated concrete slab for workshop'

Oct 7, 2022

Not sure if this is in the right section, but didn't really feel like "project" or "tools and materials" either...

Anyway, I have a space of about 6.4 (width) and 6'ish length where I want to build a reasonable workshop. The walls will probably be double skinned breeze blocks (maybe with render or fake wood cement cladding), with sound absorbing insulation in between the skins.

I will build it slightly smaller than the available size, because I want to be able to fix issues around the building, so probably leaving 0.4-0.5m per side (left, right, back), so internal floor area will...

• Henrik
• Replies: 40
• forum: The Brew Room

• 

That hollow core flooring is heavy, and more difficult to handle than hardcore I imagine.

 

[gaz1]

That hollow core flooring is heavy, and more difficult to handle than hardcore I imagine.

its not used as that reference the hollow floor takes up space whilst using less cement

the core will still support the thickness of cement going on top of it but will allow heavy machinery to be fastened to the floor as its poured as one thickness of cement

 

[fbiiburton]

Pir is roughly 32kg density in would suggest polystyrene its a better material, if you want dense use uhd poly but I'll tell you for a fact I made HD poly car ramps and I used them on my Toyota avensis for years. Trust me its brilliant I machine big lumps of it to make film props,sculptures etc .Eccleston and Hart manufacture it. Tell them Andy from Bakers patterns ltd recommended them you may get a better response. Good luck though mate

 

[S-Rail]

Look at the product called FilCore , it’s an expanded polystyrene designed for just this , comes in varying densities depending on purpose . We used it on a hospital job to raise the area 1.5 metres pre slab pour . I chose thicknesses of 500mm thick and 100mm thick , in 2400x1200 panels , over laid so no continuous joints .

The company delivered it direct on a lorry for us as it 3 full 15 ton Lorry’s but almost zero actual weight

Filcor - Expanded Polystyrene (EPS) Structural Fill Material

Filcor EPS is an Expanded Polystyrene lightweight structural fill alternative to more traditional fill materials or as a lightweight void former in structural concrete. The standard (and the maximum) sheet or block size is 2400mm long x 1200mm wide x required thickness. The thicknesses from 25mm to

www.insulationshop.co

 

[chrisg3103]

Hope its ok, i just had a 200mm slab poured over 120mm of PIR, architect asked a structural engineer about loadings and he said would be fine 150mm type1, 50mm sand, 120mm PIR, 200mm concrete with rebar




About £1000 of insulation and that was at a good rate!

Plan on many machines and stuff on top