Blocks

[Yorkblade]

Hi all.

We are having our extension built using blocks. Our builder has requested we use 7.3n lightweight blocks but our architect says use 7.3n dense blocks. We are having some steel work but in but as far as I understand...if the compressive strength is the same then it doesnt matter whether you use lightweight or dense?
The lightweight also had better thermal properties.

 

[blup]

Isn't 7.3 the minimum strength so provided that meets the load bearing requirements, lightweights shouldn't be a problem?

Blup

 

[mattylad]

Why ask us? ask your architect!

 

[Yorkblade]

Why ask us? ask your architect!

Why not ask you? I was trying to understand if there is a difference other than weight of the block. Baffling why you would go out of your way to post something that isnt in the slightest helpful but never mind mattylad...as long as you're happy.

 

[mattylad]

No dude, your suggesting changes by your builder.

Your architect is the person you need to ask if it's OK to do, the architect may have made calculations etc. based on what they have specified and this change may affect that.
Some random person on the internet may or may not know the answer, may just tell you what you want to hear.

Your architect is the person responsible for the design, ask them.

 

[Deleted member 292770]

get another builder .
Your plans are passed on dense block.

 

[Designs.3DR]

Rather than ask your architect i would ask your structural engineer as he will know more about that then the architect.

Generally 7.3 is good for double story.

He probably specified dense as there wasnt a need for the extra thermal properties. lightweight provides i.e the dense worked with the insulation specified.

What is the cavity and insulation specified?