Mono Pitch Lean-To

3D Modelling by John Paul Designs



Origially a lean-to addition is a shed with a sloping roof and three walls that abuts the wall of another structure. This form of lean-to is generally provisional; it is an appendix to an existing building constructed to fulfil a new need. In the earlier times if it was a farm building it would be termed as a “shipham” a place for keeping cattle in the winter -later times it could be a simple porch into the main house.

If we go into the 70’-80’s they became more popular as glass constuctions again to fulfil a need. Now though it was generally to extend the living accomadation—very often to provide extra space to the kitchen area; maybe in the form of a utiliy room.

As in the early conservatories -they were quick and easily constucted onto a cement slab again very often witout planning permission being required. They were single glazed or poor-quality double glazing with plastic/polycarbonate roofs-too hot in summer and too cold in winter.

Over the years they have improved beyond recognition; the main changes have been in the quality of the glazing units –they are now 4mm or 6mm toughened glass both externally and internally with a minimum of 16mm air gap between. The roof is also constructed in specialist glass normally solar controlled –which helps to lessen the heat input in summer and are constructed in the same glazing as the walls therefore keeping the heat in during the cold months. The roof usually will have electrically controlled opening vents for air circulation. They have become a much more usable room allthe year-round. Very often they will be equiped with some form of heating -either simple radiators or under floor heating.

As opposed to a conservatory which would normally have an apex roof the “lean to” or referred to as a” mono-pitch” -single sloping roof is generally a simpler construction as an addition to a house. They can also be more aesthetically pleasing to the lines of the building.

Very often they will be constructed totally in glass – giving a very light and airy feeling to the extra space produced. However, they are very flexible allowing the introduction of solid walls usually on one or both sides very often for privacy reasons.

They can be suitable for a whole range of doors from simple French doors –bi-folding or sliding door options

They can have fully glazed roofs or part slate part with glass panels.

A note -that due to increase weight of the modern construction they do need more substantial foundations.