A 19mm Pent Building installed locally to us, As you can see the base to the building wasn't as perfect as we'd like so after discussing various options with the customer we reached an agreement to install the base on a timber Ladder frame, longstanding these bases aren't exactly perfect in our eyes, however they do offer an instant solution and there's no saying they wont last for years to come

As you can see in the pictures the base has been supported by various timbers on top of the original slab base and with added support onto the base extension by installing posts into the ground