kenny_david

Many thanks Onoff for explaining this so well it's much appreciated. I will be able to lift the shed up and do option 3, wish I had the advice before hand☺️. Would you do a sand and cement screed(4:1) on top of the pad/dpm or normal concrete with aggregate to keep the floor strong enough??

hi Onoff my thinking on the "taping it to the wall" is only temporary while I put the final surface down I will cut away the excess DPM once it's cured, my thinking is that the DPM and extra layer of screed or concrete will stop any water coming in under the metal shed when it rains

I've seen on websites that the British standard is between 50mm and 75mm so if I go with 50mm will it be too weak?? Or should I just do a concrete mix of cement, aggregate and sand to make sure the final shed base is strong enough? really confused.

Hi All new to the forum. I have a new metal shed on top of a 4inch concrete base and need a final layer to waterproof and set the shed in place but I'm getting confused whether to put down a screed or just put down more concrete. The shed is 4x3 meters and I plan on putting down a DPM taping it to the walls then putting another final layer. If I use screed I was thinking of putting down 50mm but I'm worried that screed won't be strong enough. For the screed I was planning to make a 4 to 1 sand cement mix or should I just put down more concrete??? It needs to be a minimum height of 40mm to cover the steel base around the edges any advice would be much appreciate and I will be mixing with an electric mixer.

I'm David. like to do as much DIY jobs as I can . but need lots of research and advice.