February 19, 20188 yr Author 12 minutes ago, SteamyTea said: Can you park a 2 tonne car on it, repeatedly. 150 kpa is about 22 lb to the square inch isn't it. Trust me no matter what solution I use we are never parking a car on it ? http://coolconversion.com/pressure/150-kPa-to-kgf/m2 hmmmmmmmmmm !! 15,000kg per square meter ??? That right. Edited February 19, 20188 yr by pocster
February 19, 20188 yr 9 minutes ago, SteamyTea said: Can you park a 2 tonne car on it, repeatedly. It's rated at over 18 tonnes/m², so a 2 tonne four wheel vehicle with a tyre contact area of around 0.05m² per wheel, and a roughly 60/40 split between front and rear axles would exert a pressure from the highest loaded tyres of around 12 tonnes/m² (if I've done the sums right........). So it looks fine to me, with a margin of around 150% without even into account the load spreading effect of the top covering, which will have a significant impact on reducing the point loads seen by the insulation.
February 19, 20188 yr Author 1 minute ago, JSHarris said: It's rated at over 18 tonnes/m², so a 2 tonne four wheel vehicle with a tyre contact area of around 0.05m² per wheel, and a roughly 60/40 split between front and rear axles would exert a pressure from the highest loaded tyres of around 12 tonnes/m² (if I've done the sums right........). So it looks fine to me, with a margin of around 150% without even into account the load spreading effect of the top covering, which will have a significant impact on reducing the point loads seen by the insulation. Lol the parking area would probably just about take the size of an average car ! i think total depth for this insulation is around 20mm ( which is amazing ! ) . Will contact a firm tomorrow too see ! undoubtedly £££££££ will be distressing !
February 19, 20188 yr 3 minutes ago, pocster said: undoubtedly £££££££ will be distressing ! I fear you may be right..........
February 19, 20188 yr Author 17 minutes ago, JSHarris said: I fear you may be right.......... Oh but a solution!!!! architect is now on about ashfelt as the waterproofing ......
February 19, 20188 yr 1 minute ago, Russell griffiths said: How do they make multi story car parks waterproof ? They don't, they leak like sieves usually. One of ours here in Salisbury that I fairly regularly use always has big puddles on the lower floors from leaks, plus it is now growing what look like stalactites from every joint in the concrete, where the water is dissolving carbonates from the concrete and redepositing them as stalactites.
February 19, 20188 yr 31 minutes ago, pocster said: I need to achieve 0.19 u How thick is the existing slab and is it just regular cast concrete. Concrete has an R-Value of between 0.43 and 0.87 m.K/W
February 19, 20188 yr Author 10 minutes ago, SteamyTea said: How thick is the existing slab and is it just regular cast concrete. Concrete has an R-Value of between 0.43 and 0.87 m.K/W Regular reinforced- can’t remember exact depth ( will check ) but can guess 100mm
February 19, 20188 yr If we say that it is 0.1m and has an R-Value of 0.6, then that is a U-Value of 16.6 I think, but I may not be thinking straight as it is late and I have been struggling with my ESP2866 all evening.
February 20, 20188 yr Author Spoke to vac panel ! 40mm gives a u of 0.18 :-)))) Thry are happy with concrete board on top , waterproofing and then concrete pour . price will be around £110 a sq metre ?
February 20, 20188 yr On 18/02/2018 at 19:12, pocster said: But the shame !!!! ? I think your Avatar makes this point comprehensively moot. Edited February 20, 20188 yr by Ferdinand
February 20, 20188 yr Author 3 hours ago, Ferdinand said: I think your Avatar makes this point comprehensively moot. My avatar will out live you all and become the thing of legends !
February 20, 20188 yr 30 minutes ago, pocster said: My avatar will out live you all and become the thing of legends ! Indeed. Literally unforgettable. Engraved on all our memories like a Poem by William Topaz McGonagall. And with that, back to topic and an end to my heckling ... Edited February 20, 20188 yr by Ferdinand
February 20, 20188 yr Can you really not have the concrete as the finish so not needing the blocks or sand so giving you more room for the insulation, you need to not think of it as a horrible grey rough as a badgers whotsit, and look at all the great finishes you can achieve with it.
February 20, 20188 yr 1 hour ago, pocster said: thing of legends Legend without a loincloth !! Edited February 20, 20188 yr by SteamyTea
February 20, 20188 yr 1 hour ago, pocster said: My avatar will out live you all and become the thing of legends ! It'll damage generations that!
February 20, 20188 yr Author 19 minutes ago, Onoff said: It'll damage generations that! More damaged you mean ?
February 21, 20188 yr Author Well ! Got a price !! ? 3.8k for 40mm + vat 3.4k for 35mm + vat ( u difference is about 0.01 ) so I think 35mm will do ! area is approx 6m x 6m my next lesser issue issue is what concrete board to put over them . Must be tougue and grove as can’t fix through the vac packs . Also be able to take whatever waterproofing method architect fancies ...
February 21, 20188 yr To err on the side of caution, EPDM over concrete. It is possible to lay up GRP onto concrete, but would need some rapid ageing tests first. The problem is that there are so many different mixed of concrete and they can have different water content depending on how old they are.
February 21, 20188 yr Author 21 minutes ago, SteamyTea said: To err on the side of caution, EPDM over concrete. It is possible to lay up GRP onto concrete, but would need some rapid ageing tests first. The problem is that there are so many different mixed of concrete and they can have different water content depending on how old they are. I meant cement board so this on top insulation - do grp , edpm, ashfelt etc . Bond to cement board ?
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