Greenhouse foundation advice

I am in the process of preparing a solid foundation for a 6' x 10' greenhouse with a step up at the front. It's on a gentle slope (back is about 30cm higher than the front), so I started by making a level wooden framework and have filled it with old bricks & stone, deeper at the front to make it roughly level. There is about 10cm between the level of hardcore and the top of the woodwork. My plan is to compact a layer of type 1 to a depth of 5-6cm and finish with 3-4cm of a more decorative gravel/slate chippings. The concern I have is that the hardcore is not perfectly level and has some noticeable ups and downs, particularly towards the back. Should I spend more time getting it level, or can I smooth it out with the type 1? Photo attached for reference - the posts with pots on are the legs of the greenhouse itself, which have been cemented in place. submitted by /u/kettle_on [link] [comments]

Mar 23, 2025 - 19:52

I am in the process of preparing a solid foundation for a 6' x 10' greenhouse with a step up at the front. It's on a gentle slope (back is about 30cm higher than the front), so I started by making a level wooden framework and have filled it with old bricks & stone, deeper at the front to make it roughly level. There is about 10cm between the level of hardcore and the top of the woodwork.

My plan is to compact a layer of type 1 to a depth of 5-6cm and finish with 3-4cm of a more decorative gravel/slate chippings. The concern I have is that the hardcore is not perfectly level and has some noticeable ups and downs, particularly towards the back. Should I spend more time getting it level, or can I smooth it out with the type 1?

Photo attached for reference - the posts with pots on are the legs of the greenhouse itself, which have been cemented in place.

submitted by /u/kettle_on
[link] [comments]