Corrugated sheets are a single polycarbonate that is usually very narrow, usually 0.8mm. It is obtainable in a wavy or greca style. It will work great for a greenhouse, but won't have as much insulating factor as a twin wall sheet.

Polycarbonate, basically put, is a plastic. It is lightweight (1/6th the weight of glass), virtually unbreakable (impact strength 200 times greater than glass), has excellent weather resistance (due to the UV protection on or sides of the sheets), has excellent insulation (due to the multiple layers with channels in between) & is flexible & straightforward to put in (see specific knowledge on each thickness). You can purchase it in solid sheets, corrugated, or multiwall. The typical configurations used for greenhouse glazing are corrugated & multiwall. The reason the solid sheets are not recommended is due to the fact that they are not widely obtainable with a UV protection on side. The UV protection will keep the sheets from yellowing or getting brittle. Some people will mistakenly think this affects the light transmission of the sheets. It's nothing to do with that. The sheets with UV protection on side are usually guaranteed for ten years against yellowing & hail destroy. This will vary from manufacturer to manufacturer. There's also sheets obtainable with UV protection on both sides. These are usually used for vertical applications such as fencing where both sides of the sheet are exposed to the sun. While this may be used for a greenhouse it is usually more expensive & unnecessary.

Most greenhouses are glazed with clear polycarbonate. It is obtainable also in bronze & opal. These will cut down on light transmission drastically. Of work, whether you need to think about opal or bronze will be contingent on the needs of your particular plants. There's also some specialty sheets obtainable which will cut down on the heat buildup in the greenhouse.

The simplest way to visualize a twin wall sheet is to think about looking down the fringe of a cardboard box. There is a sheet on the inside, a sheet on the outside with a rib walking in between the sheets. The rib in a cardboard box will be wavy. The rib in polycarbonate runs straight between the two sheets. Both sides of the sheet are flat. The sheets are clear, but not "crystal clear" like glass. The rib will distort your view . It is obtainable in 6mm, 8mm, 10mm & 16mm thickness. The 16mm is usually a triple wall - meaning there will be a sheet walking between the two exterior sheets. There's also some 8mm sheets obtainable as a triple wall. Usually, the thicker the sheet, the better the insulation factor. ought to think about the preliminary cost of the polycarbonate when thinking about the general savings due to energy costs. A 16mm sheet is about 5/8" thick. Polycarbonate sheets are shipped by van line because they cannot be rolled & must be shipped flat.

In closing, polycarbonate is an excellent choice for greenhouse glazing. It is simple to put in & long lasting.