A small glass roof is practical and beautiful in many uses. It can protect against rain over an entrance door, cover a terrace or cover a greenhouse and winter garden. Structure and scaffolding can be built by yourself and can be done by skilled craftsmen. Cut-to-size glass and mounts are available.
A monopitch roof in a wooden beam construction
If you want a glass roof over a balcony, entrance, terrace or winter garden, you can save a lot of money with a little manual skill. The simplest form is the simple inclined roof shape of the pent roof. If a halved hip roof is to be created, advanced knowledge of carpentry work is required.
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As a substructure, wooden beams, rafters and strips are the easiest material to work with. If you work with metal, you have to weld. Depending on taste and visual requirements, the substructures range from simple rafters laid parallel on two crossbeams to a roof truss.
If the substructure is to have a metallic look, there is no need for complex metal processing by cladding the wood with sheet metal. The sheet metal also protects the wood from the elements.
Properties of types of glass
Acrylic glass or real glass can be used when building a glass roof. When choosing real glass, ESG or VSG safety glass must be selected. From a material thickness of eight millimeters, the glass is "ball-proof".
- One square meter of acrylic glass (eight millimeters thick) weighs around twelve kilograms
- One square meter of laminated safety glass (eight millimeters thick) weighs almost twenty kilograms
Substructure and glass assembly
The wooden substructure must be planned depending on the size or depth of the roof. Up to about one meter, only free-floating constructions attached to the wall on one side are possible. With larger glass roofs, support beams must either run diagonally to the wall or be installed vertically as posts.
The following planning steps determine the cross-sections of the wooden beams, strips and the fastening profiles or types:
- Calculation of the snow load
- Slope or incline
- Weight and size of the glass elements (distance and number of supports)
- Water drainage (eaves with gutter or pure drip edge)
In the following video, a profile manufacturer presents possible glass roof variants and mounting profiles that you can build yourself: