Which blocks

[maltaron]

This has probably been asked before. I am shortly buiding a garden shed 12ft X 8ft with flat roof. Below is a list of blocks available from my usual supplier. Advice please, which do I order?

DENSE HOLLOW BLOCKS
215mm Dense Hollow Block
100mm 7N Dense Solid Concrete Block
140mm Dense Solid Concrete Block

DENSE SOLID BLOCKS
LIGHTWEIGHT BLOCKS
100mm 3.5N Lightweight Aggregate Block
THERMALITE
275mm Tongue and Groove Trench Block
100mm Shield Block

TIA

 

[tuckjointer]

What are you going to do with the outside of the shed ie. paint, render.

If you intend to paint or leave as is I would go for a 7N solid dense. If you are going to render then go for the cheapest solid block.

 

[^woody^]

100mm 3.5N concrete - unless you want the pain of laying the heavier ones.

 

[maltaron]

Thanks for the prompt replies. It will be rendered so I'll go for the cheapest.