Clane Shed experiences concrete base

Wolfyboy555, I organised a shed for a friend in 2020, and the shed company gave me the name of a builder that they use and recommended him.

The builder was very good and had his own building regulations for sheds, which I thought was alright.

He cleaned the area for the 7 m x 5 m shed, fitted 100 x 50 mm timber Formwork and pored a concrete foundation with some mesh reinforcement.

Under the floor area of the shed he put in 100 mm limestone 40 mm-down hardcore and compacted it with a plate compactor.

See photos.

Everything was level and square and well done in accordance with the specification by the Shed Company.

The shed was delivered, and erected and bolted on to the foundation on top of a DPC.

The builder returned, removed the formwork fitted a sheet of polythene (DPM), which travelled up all 4 sides of the metal shed. On top of this he fitted 50 mm high-density insulation with foil on both sides and poured 70 mm concrete on top of the insulation, and finished the concrete floor with a timber float.

We cut off the DPM 25 mm above the floor.

The builder made a super job of the foundation and floor.

Yes but not on my phone. I will have to get them off my work computer.

Meant to say too that we put plastic membrane to stop the grass and plants growing up under it too.

Just had a look under it the other day. Loads of leaves after blowing in over the 10 years or so, but still plenty of gap there. Plywood on the floor is in great condition still.

If I were doing it again I would go for this raised one again. Much, much cheaper than a concrete floor. Now if you are storing really heady stuff in it then thats a different story. Like a tractor mower. I would have a concrete floor for the likes of that.