How do I calculate my roof areain M2???

paddy147

I need to find out how many M2 my entire roof area is.

How do I go about doing this??

Thanks.:)

dpofloinn

By space do you mean the volume of the attic space or the surface area of the roof or attic floor, also what type of roof do you have ie pitched,hipped,dormer etc

mickdw

Are yoy looking for attic floor area, attic volume or even sloped road area?

sky6

Is it the area or the Volume

Area of Attic Length by Width= sq feet x by 10.764 will give you Sq Metres.

Volume of Attic Length by Width x Half the Height = Cubic Feet.

paddy147

Im looking for the Actual roof area in sq meters .....its for a rainwater harvesting system.

Thanks for your help guys.:)

mickdw

paddy147 wrote: »

Im looking for the Actual roof area in sq meters .....its for a rainwater harvesting system.

Thanks for your help guys.:)

I think you just need the flat area for that too. After all, the same rain will fall on your house whether its got a flat roof of a steep pitched roof.

Kristopherus

paddy147 wrote: »

Im looking for the Actual roof area in sq meters .....its for a rainwater harvesting system.

Thanks for your help guys.:)

And I thought you were going to wash it with that new cheapo power washer you got:D

Cerco

Depends on the shape of the roof.

paddy147

Cerco wrote: »

Depends on the shape of the roof.

Semi-D house with large pitched roof space/area.

paddy147

Kristopherus wrote: »

And I thought you were going to wash it with that new cheapo power washer you got:D

Fantastic,compact yet powefull power washer for 15 euro.:D

Tried it out today....well impressed with it.:D

martin46585

The safest, simplest way is to just count you roof tiles or slates, With tiles the area is approx 1.2ft2 and with slates the surface area is slightly less at 0.8ft2 each......

gman2k

The area you need is the footprint / plan area of your house, as stated above, the amount of rain falling on an area is unaffectecd by the shape of your roof.

paddy147

gman2k wrote: »

The area you need is the footprint / plan area of your house, as stated above, the amount of rain falling on an area is unaffectecd by the shape of your roof.

So for examples sake...... that a house has a floor plan/area of 150 square meters.

Then thats the sq meter area/size of the roof aswell??


Thanks.:)

NiThigim

It's explained here, under Sizing a catchment area. Roof design only matters if you only collect from one side/part of the roof. Don't forget to add the overhang if there is one.

Good calculator here.

kkelliher

paddy147 wrote: »

So for examples sake...... that a house has a floor plan/area of 150 square meters.

Then thats the sq meter area/size of the roof aswell??


Thanks.:)

No (yes if property is single storey) as that will be for both your ground and first floors.

You just need to measure the area of the property on the floor under the roof.

paddy147

I didnt think there was so much to consider when digging a big hole and sticking a tank in it.:pac:


Thankyou to all for your help and thankyou for the links too.

Much appreciated.:)

paddy147

NiThigim wrote: »

It's explained here, under Sizing a catchment area. Roof design only matters if you only collect from one side/part of the roof. Don't forget to add the overhang if there is one.

Good calculator here.

Thanks.:)

paddy147

kkelliher wrote: »

No (yes if property is single storey) as that will be for both your ground and first floors.

You just need to measure the area of the property on the floor under the roof.

And thanks to you too.:)