The short and simple answer to this question is yes, just like other new extensions, you must have a foundation done for your lean to conservatory. In order to transfer the building’s weight to the floor safely, there’s a need to construct a foundation. Without it, the structural integrity of the extension would be heavily compromised. What’s more? While there’s no minimum depth requirement for a lean to conservatory, there are multiple factors that can affect the depth as well as type of the foundation. Let’s take a look!
- The nearby trees. What trees do is to absorb water from the soil which can affect the foundation significantly. When water is absorbed from the soil, the soil shrinks which affects the foundation’s strength. The size as well as type of the tree will determine the extent of the water absorption from the ground.
- The soil’s suitability. The weight that each soil can withstand varies and even more so, when environmental factors have more effect on certain types of soils than others. For instance, chalk is able to drain water away relatively easily which means that nearby trees will only have a little effect on its quality. Clay, on the other hand, shrinks when drying and also retains a lot of water. This means that nearby trees will have huge impact on clay soil which will compromise the structural integrity of the lean to conservatory. Therefore, since changes to clay mostly occur to about 0.75m depth, foundations on the soil should be constructed deeper to compensate.
- Undisturbed ground. Before the foundations are laid, there’s a need to identify grounds that hasn’t been built on and this usually takes a depth of about 1m (this figure may vary especially in regions where drains have been laid).