b'Do you require an additional door placed in a gable end or the sidewall?We can increase the sidewall height to accommodate our standard 74 door.Are there access stairs to work around? We can build the greenhouseto suit a dropped foundation and/or a walk-in greenhouse.What do you need for a foundation? A concrete foundation is recommended, since our greenhouses are a lifetime product and will last as long as your house.hoW shouLd you attach your greenhouse?Our greenhouses are designed to install to the outside surface of an existing building and that could be siding, stucco, wood shakes or brick/ stone. We are frequently asked if the attaching wall will degrade faster than the other exterior walls of the building. In our experience, the temperature inside the greenhouse is a more controlled environment in terms of temperature and humidity and as such, the wall will not degrade as fast due to fewer fluctuations. People also ask if the extra humidity will cause rot or mould due to increased condensation.Increased condensation will be a problem for your wall and also harmful for your plants. Condensation can be easily controlled so that is not the case using standard ventilation procedures. A walkout basement is a common entry for a home-attached greenhouse.4'