Concreting ICF



When asked how best to put concrete between the forms there is only ever one simple answer, and that is use a concrete pump. Rhodipor Ecobuild’s European Technical Approval allows for such and we strongly advise concrete to be poured in to the forms this way.

It should be noted that some of the other ICF block manufacturers do not have approval for pouring concrete between the forms with a pump so always check.

Pump hire is based on a day /half day rate complete with operator, and prices vary nationally but there are many national and independent companies throughout the UK servicing this industry.





Pumps vary in size according to the boom length allowing the machine to reach all corners of the build and it’s important to order the correct size. We will advise as to the concrete pump requirements.









The pump should be sited to allow its reach to safely stretch to all corners of the building. This is preferably checked prior to the concrete wagons arrival in case of adjustment.  The pump is generally parked facing in to the site so that concrete wagons can reverse in and deposit the concrete in to the hopper.

We would also suggest that the location of the pump be ‘stoned out’ and the access road to allow free and easy access for the vehicles. (This can be invaluable for other deliveries also)





007_concrete-being-placed-in-to-the-hopperThe concrete specification is generally between C30 and C40 with a slump of 75mm to 120mm. The aggregate size should be no less than 8mm and not exceed 16mm but your project engineer will advise more accurately as to the requirements.








The mix is to be fluid so as to flow around the forms.








Concreting the Rhodipor Ecobuild walling should be commenced at the window cills or a corner and slowly progressed around the building, incrementally increasing the amount of concrete in each location.

When the concrete reaches the top of the form simply float off level to receive a floor or wall plate etc.





If you still wish to fill the forms by hand then we would suggest you go to your local B&Q and lift a bag of sand. Now imagine doing that a few hundred times through a day, working to get the concrete in places before it sets!!!!