Another fireplace thread

Bump. Off to Wickes in a bit for date night :D The area we want to mortar (shown above) is 60x90cm. Any idea how much mortar we should get? :confused:

The fact sheet says 1kg fills a void of 440cm3... But that would mean we'd need 14kg which seems wrong? :confused:
 
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That 5kg tub will be more than enough, I think you're confusing cubed with squared without doing the math myself.

I've never bought that sort of stuff, just made it myself so not sure what ratio it is, but it'll bed down a bit, it's a bit like tile adhesive seeing as you've used that...
 
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Scam said:
Bump. Off to Wickes in a bit for date night :D The area we want to mortar (shown above) is 60x90cm. Any idea how much mortar we should get? :confused:

The fact sheet says 1kg fills a void of 440cm3... But that would mean we'd need 14kg which seems wrong? :confused:
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60 x 90 = 5400cm²

If that were 1cm high you'd need 5400cm³. If it were 2cm high you'd need 10800cm³ etc. So I think your guess is right - 1000cm³ is 1 litre (think of a square carton of milk etc), so it seems 1kg is a pretty small volume of mortar. Less than a pint. Makes sense because 1000cm³ of water is 1kg and mortar should be denser than water.
sja360 said:
The holes will be for ventilation perhaps although rather poorly done as it doesn't directly connected with the flue
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dlockers said:
Looks like someone may have had a similar idea to yourself w.r.t to opening it up, and drilled some peep holes?
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No idea what you lot are smoking, have you never seen these before? My entire house is made of them! Soft, crumbly, loose-stone breeze blocks with vertical holes. They're ****ing awful and give way when you so much as look at them wrong. Rewired my house and almost every single back box couldn't be fixed solid because there was either a total void behind the box, or if I did manage to find something to nail into, it blew up into pieces.

No one drilled holes, they're not for ventilation, they're just the worst blocks known to man :p
 
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