WILL Celcon Standard Blocks STAND UP TO FREEZING WATER

[zappastix]

Hi

The block work for our extension is nearly complete.

Blocks used with 100mm full fill cavity (Knauf Earthwool DriTherm Cavity Slab 32 Ultimate)
are: Celcon Standard Blocks Plain Face - 440mm x 215mm

Since the heavy rain, the walls/blocks are standing in around 8 inches of water.

This is on the outer leaf and the inner leaf as there is no roof.

JUST A FEW QUESTIONS

As these blocks are apparently made up of millions of air holes, will the water penetrate
deep into the blocks?

If so, and the temperature drops to freezing - will the blocks split/crack open?

When the wall is completely finished it's to be rendered - but if these bottom blocks crack
does that mean all the walls would have to be pulled down and rebuilt?

Many thanks.

Worried Stephen

 

[noseall]

The blocks will be ok.
They will however require drying out before plastering.

 

[loply]

Might be worth pumping that water out if you're thinking it could end up frozen Imagine an 8 inch frozen ice rink in your extension.

If nothing else it'll take a lifetime to melt.

 

[zappastix]

Thanks noseall and loply.

That's a relief.

Will wait for warmer weather before plastering.

Pheew!

 

[Emeraude119]

Aircrete blocks are regarded as being water resistant but not water proof.
They have a low air permeability rate, therefore if air cannot get through them easily, neither will water/ They actually float for weeks when placed on water , but will eventually take on enough to sink, if kept there.

They are also regarded as a high to medium suction background, therefore in hot dry weather a light spray of water on the area about to be rendered will knock back the suction or the use of a bonding agent will control back ground suction. Any render / plasterer who cannot recognize different back grounds and take steps to control background section should consult the manufacture for advice.