Garage Floor

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Hi all,

I am building quite a large garage and I want to build the floor with insulation (like a house), underfloor heating and possibly a polished concrete floor.

Any advice on construction of the floor. For example should I go 150mm MOT, compacted, 100mm insulation and 150mm concrete?? I am a bit worried about the strength of the floor if I want underfloor heating - I know garages can have it these days but what would be needed for this if I want a polished concrete type finish?

Thanks

D
 
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Assuming you mean this’ll need to take a vehicle weight I’d have thought the ufh would need to be below at least 150mm of concrete slab so I’d be concerned how effective it’ll be.
 
Not come across underfloor heating to take the weight of a vehicle but don't forget a dpm on sand blinding on hardcore .
 
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From further research, in case this is helpful to anyone, I understand it is best to lay the hardcore (compacted), 150mm of concrete then 100mm insulation with the UFH pipes clipped to it. On top of this then a 75-80mm of screed then whatever floor covering required. I will probably go for fibre reinforced screed.

Apparently if using a boiler for the heat source the temperature of the water going into concrete shouldn't be more than 45 degrees.


Regards

D
 
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You still aren't including a dpm in your specification :!: 150mm consolidated and compacted hardcore, 50mm sand blinding, Visqueen dpm, 150mm concrete . You then say UFH pipes and 75mm reinforced screed - I don't know about this part, whether it will take the weight of a vehicle in a garage :cautious:
 
You still aren't including a dpm in your specification......

Yes, I was just summarising the main construction but yes, I will be including the visqueen and blinding. Apparently the screed specification will take the weight of a vehicle. Having said that it will only have motorbikes in it anyway.
 
Having said that it will only have motorbikes in it anyway.
I keep my motorbike in the garage , the car stays on the drive .Even if the garage wasn't full of other things I don't think I could drive the car in and open the door to get out :!: They don't make garages wide enough do they.
 
garages used to be essential to make the car last a reasonable time, so "garaged since new" used to be a plus for second hand cars.
Now there's no benefit of garaging other than perhaps security, so garage is mainly storage room much like a loft only with better access.
 
I keep my motorbike in the garage , the car stays on the drive .Even if the garage wasn't full of other things I don't think I could drive the car in and open the door to get out :!: They don't make garages wide enough do they.

It will be more of a workshop really......purposely built to the specification of a house;)
 
Also keep in mind, depending upon what 'type' of screed you are using it takes a certain number of days to dry before you apply the heating. Some boilers have a UFH dry mode ( usually air source heat pumps ), essentially you need to raise the temp a degree a day. Do it too quick and you'll crack your floor.
 

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