Foundations

A concrete slab is the ideal foundation for your new shed or gazebo kit. However, it isn't the only option. The most important aspect is a site that is flat and level. Your new shed kit won't look very good if there is any undulations or slope grades underneath your foundation.

The most basic approach is a flat dirt site that can be screed graded with a long 2x4 board to flatten out any bumps. Then use a carpenter's level to check for level. If it is flat and level, get about a dozen concrete stepping stones and space them out every 2-3 feet. Once it looks like this, you can put your floor kit directly onto the stepping stone foundation:


You can also use a bed of crushed rock (3/4" is good) or gravel (pea gravel or road base) if you have an easy way to transport the extra fill material needed. The nice thing about this technique is you can easily rake the material to make it flat and level.

Another option is using railroad ties or similar pressure treated heavy lumber to create a flat and level shed or gazebo kit foundation. The key factor with this material choice is that it will raise the height of your floor quite a bit.

Lastly, you can use a pier block deck foundation if you are covering a large change in slope angle. This method is usually quite expensive.