There are many types of design, but ...

There are many types of design, but ...

There are many types of design, but the most economical and satisfactory is the so-called 'even span' type where the roof slopes uniformly down from both sides of a ridge to the eaves.

This slope should never be less than six inches vertical to one foot horizontal; a lesser slope will invariably cause leakage during rainy weather, and, instead of running down the glass, condensed moisture will drop from the glass on to the plants below.

If condensation grooves are milled in the sides of the bar supporting the roof glass, moisture condensing on the glass will be drawn off and destructive dripping prevented.

A lean-to construction, with the greenhouse attached to the building along the high point of the glass roof, is sometimes necessary.

In this case there are certain difficulties to be overcome.

It is difficult to make strictly weather-tight joints between a lean-to and the building that forms one wall.

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Stay tuned for more orchid-growing advice tomorrow! :)




Woo hoo!