ᐅ Is the price difference between Poroton and aerated concrete justified?

Created on: 1 Dec 2013 23:52
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TripleB
Hello everyone,

I have a quick question regarding the prices of Poroton and aerated concrete.
The background is that our architect made a "small" mistake in the specifications for the interior walls.
He accidentally requested Plan perforated bricks instead of aerated concrete (to be supplied and professionally installed). Unfortunately, this only came to light afterward, when the contract had already been awarded. The structural builder has now sent a change order, stating that aerated concrete is over 30% more expensive per square meter net. (24 cm (9.5 inches) perforated bricks = 49.22 Euros/m² and aerated concrete = 65.29 Euros/m²). The same applies to the 17.5 cm (7 inches) “stone” – bricks = 37.82 Euros/m² and aerated concrete = 49.40 Euros/m².
Are these prices reasonable, or does this seem like I am being overcharged?

Many thanks in advance for your assessment.

TripleB
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TripleB
2 Dec 2013 12:17
Sorry, but everything mentioned so far is basically clear to me as well, yet it does not answer the fundamental question. Surely, every tradesperson will use changes as an opportunity to increase the price – but that is not right and never will be!
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Bauexperte
2 Dec 2013 13:36
Hello,
TripleB schrieb:
Sorry, but everything mentioned so far is basically clear to me, but it does not answer the fundamental question.
I just checked, aerated concrete currently costs us 18.5% net more per square meter compared to porous clay blocks. However, this information won't help you because your shell builder will definitely have different purchasing conditions than we do.

Regards, Bauexperte
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TripleB
2 Dec 2013 17:50
Hello building expert,

that is clear, but at least it provides a reference point...

Good luck
TripleB