Calculating Blocks

prospect

Folks,

I am weighing up my options on building a garage. I am considering a 'direct labour' approach as the budget cannot stretch too far. So I need to see how cost effective it is too build, versus a PVC Coated steel garage.

Anyway, to get to the point, how do I calculate the number of cavity blocks that would be required? The dimensions are approx 23 feet by 15 feet, with one double door, a single door and maybe one window.

Also, does anyone know the name of the roofing product that is delivered in sheets, but looks like tiles? I need to get the spec for the minium pitch of the roof (i want to keep garage roof line as low as possible) and also if they supply clear sheets to let in light.

Thanks in advance.

smashey

Nordman have those sheets as do Kingspan. Work out the area of your walls (minus the door area and any windows) and calculate how many blocks are required based on the face area of the block. Allow a few extra. Simple mathematics.

davidoco

http://www.roadstone.ie/products/Blocks/Standard.htm
you'll be looking at the 450 range. You'll be using 10 per sqm. Your looking at 600 blocks.

also nordman.ie for sheets

Rudolph Claus

What height are you assuming the garage to be with them calculations, Davidoco? Im just working it out myself out of interest, wanna see if i can arrive at the same figure. Did you allow for the doors/window?

prospect

Thanks for the help.

I will get the full dimensions and do my maths, and post back here so I cn get them checked.

Cheers.

davidoco

Nuttzy wrote:

What height are you assuming the garage to be with them calculations, Davidoco? Im just working it out myself out of interest, wanna see if i can arrive at the same figure. Did you allow for the doors/window?

2.5 m height. No account taken for windows, doors as you would use those blocks for the gable and or to give a lean-to roof. Also when the brickies are charging you they usually look for the windows/doors to be included as blocks as there is some work in it for them with the lintels etc.


Permiter 5 + 7 + 5 + 7 = 24 metres
Total by height 24 m * 2.5 m = 60 sq m of wall
then 10 blocks per sqm 60 sq metres x 10 blocks per sq m = 600 blocks

pan

There is a calculator here;

http://www.bulkbagman.co.uk/calculators/brick-block-calculator.html

Ewan

Prospect,
the block layer generally will not take opes into account when pricing for the job as extra work involved cutting blocks, extr wall ties etc.....so when pricing take account of full wall panels....also, a cavity block garage will be very cold and damp as the wall will weep....might be better off if you can go with inner and outer leaf.....