Hi
Just dug out over the weekend in prep for the raft foundation of my extension. I have a question regarding details under the raft. The SE has drawn 100mm of Type 1 and the 75mm of lean mix blinding on top of type 1, all underneath the raft. Can anyone tell me why the blinding is necessary, SE mentioned something about stopping mesh support chairs sinking into type 1, but if I buy the mesh supports that are on small concrete blocks I presume I don't need to do this blinding layer.
Would ask the SE, but as its the weekend.....
thanks
Just dug out over the weekend in prep for the raft foundation of my extension. I have a question regarding details under the raft. The SE has drawn 100mm of Type 1 and the 75mm of lean mix blinding on top of type 1, all underneath the raft. Can anyone tell me why the blinding is necessary, SE mentioned something about stopping mesh support chairs sinking into type 1, but if I buy the mesh supports that are on small concrete blocks I presume I don't need to do this blinding layer.
Would ask the SE, but as its the weekend.....
thanks