New Shed Construction in the Garden - Concern with regards to the build Materials used

[Janan Jai]

We are building a shed in our garden. Need this to last for 2 generations atleast. The one my neighbour built 40 years ago himself still stands good without any issues.

 

Work started. Nice chaps working on it. But I am a little bit worried about the quality of materials being used.

 

2 different types of concrete blocks are being used (as you can see from the brick block colours). The dark coloured block appeared solid. They had small stones and i can feel the sand as well in it. These both are completely different from how it looks and how it feels and how it weighs. 

 

Is it ok to use 2 different blocks of completely different types, right ?

 

 

      

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Now all the new blocks which were delivered appears different and they seem very fragile. It appears they can be broken easily ?  They dont look like real blocks.  Not sure if the builder is cutting costs here ? When I looked for details from the delivery crate, this is what i found. The blocks are from H+H - Celcon Block - Standard Block 3.6N 440  SRC140.

 

In the picture below, I have placed the other type of block which was used initially and it was solid and not as fragile as the new delivered ones.  Can you all please check and advise ?

 

Thanks

 

 

Edited October 4, 2023 by Janan Jai

[JohnMo]

You have a mix of concrete and aircrete blocks. What did your drawings state should be used?

 

 

[ProDave]

You need to work out if your builder is deliberately trying to use the wrong blocks, or he doesn't know the difference.

[Janan Jai]

16 minutes ago, JohnMo said:

You have a mix of concrete and aircrete blocks. What did your drawings state should be used?

 

 

Drawings ? There is no such thing. It is a small garden shed.

[JohnMo]

If you haven't specified anything, you get what you get. 

[Janan Jai]

49 minutes ago, JohnMo said:

If you haven't specified anything, you get what you get. 

Is it ok to build like that ? Will it be an issue  later after few years ? That is what I am looking out for ?

 

Are aircrete blocks with 3.6N good to use for general purpose constructions - Outdoor shed and external walls in my case ? Will it last long enough ? 
This is what I am looking out for.


This is not a big project to detail all these things. And I dont use big construction companies either. I am not sure if the seller will list details even if I buy a new build with these details like what exact materials /  type of construction materials are used.  This is a small project. May be iam out of touch. Apologies. But can you answer this please ?

Edited October 4, 2023 by Janan Jai

[ProDave]

The lightweight blocks would be more prone to water damage and splitting when frozen.  What will be on the outside?

 

I would want the high density blocks, apart from anything else easier to fix things like shelves to and bomb proof even if left bare.

 

Whatever you do you certainly don't want't to mix them.

[Mr Punter]

Concrete blocks or medium density aggregate blocks will be much better than Celcon.

[Janan Jai]

7 minutes ago, ProDave said:

The lightweight blocks would be more prone to water damage and splitting when frozen.  What will be on the outside?

 

I would want the high density blocks, apart from anything else easier to fix things like shelves to and bomb proof even if left bare.

 

Whatever you do you certainly don't want't to mix them.

 

Cement Rendering on the outside.

[Big Jimbo]

It would imo be better built from the aggregate blocks. Stronger and no cracking. Probably cheaper than the Celcon blocks.

[joe90]

+1 to not using celcon blocks but if nothing was specified he is using whatever he can find (probably left over from another job).