Revision history [back]

Painting PVC is somewhat difficult as the smooth surface does not allow the paint to stick very well, and inside where the water runs it will likely be washed off very quickly.

Generally speaking PVC pipes are not meant to be used being exposed to the sun, but using darker materials (called "emerald" here in the Philippines) and thicker walling (again here in the Philippines you can get "600" or "1000" type of pipes, with the latter significantly thicker) will probably help a bit.

But using specifically made plastic gutters from LDPE or similar will be always the better option as it is much more resistant to UV light.

Regarding non-plastic materials: yes you can use galvanized sheets and often already pre-bend profiles for gutters are available, but also there you need to take care of the thickness and due to the common riveting, you end up with something not much more duable as it will start rusting at the rivets very quickly. Of course you can solder it, or cover the rivets with silicone or special paint, but overall it becomes quite complicated and costly to construct if it is supposed to last more than a few years.

Another thing you have to keep more in mind with other types of materials is thermal expansion that will be more pronounced with material less flexible than plastics (again the rivets and connection points can be an issue there).

And last but not least, heavier and often sharp edged metal gutters will become a serious flying hazard when ripped off in a storm as is likely going to happen after some time of rusting.