Garage Floor

[dunny]

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

 

[23vc]

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.

 

[Leofric]

Not come across underfloor heating to take the weight of a vehicle but don't forget a dpm on sand blinding on hardcore .

 

[dunny]

Thanks both

D

 

[dunny]

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

 

[Leofric]

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

 

[dunny]

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.

 

[Leofric]

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.

 

[John D v2.0]

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.

 

[dunny]

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

 

[Leofric]

It will be more of a workshop really......purposely built to the specification of a house

Don't forget to insulate the walls and roof then to keep the bike nice and warm

 

[paulandfrodo]

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.