Polycarbonate Or Fiberglass?


While a layman may not think of polycarbonate and fiberglass having a whole lot of difference, but there are important distinctions between the two. As makers of polycarbonate greenhouse panels, we know how beneficial polycarbonate is over fiberglass. And, to help you know about the same, here we bring to you some of the benefits that polycarbonate can provide over fiberglass, when used a roofing or siding.


Polycarbonate panels have a much cleaner and fresher look as compared to fiberglass. When exposed to time and elements, fiberglass will start looking dull relatively faster. Polycarbonate maintains its clean look and strength irrespective of the type of or number of modifications made to it.


Many people, considering polycarbonate as plastic, doubt its capability and strength. But, what they don’t know is that this polymer is created through the chemical reaction of BPA and COCl2, and is so strong that it is used in making bulletproof windows. Thus, strength and durability are two desirable qualities of polycarbonate. In fact, it has a tensile strength of 900 pounds per square inch, as compared to fiberglass’s 220 pounds!

Impact resistance

Strength brings with it a certain resistance to forceful impact. This goes the same for polycarbonate too, which has more than four times the impact resistance of fiberglass! Polycarbonate can withstand all kinds of environments and outdoor weather conditions like rain, humidity, sun, wind, snow and hail. It stands sturdy even in the harshest of climates in oil and gas drilling operations, irrigation systems, wind turbines, ocean-going vessels and more. Structures which are generally susceptible to wear and tear are highly safe when built with polycarbonate.

Cutting or drilling

When you need to cut the sheets or want to make a hole in them, it is not only easier to work with polycarbonate, but it is also a clean procedure. While in the case of fiberglass, when you cut a hole in the sheet, the process requires lots of time and expertise, and makes it look very unclean. Further, cutting fiberglass makes it weaker and more susceptible to forceful impacts, and also produces granular dust, which is dangerous to inhale and is irritable for the skin too. Polycarbonate produces curly shavings that are easier to clean and cause no health risks.

UV light resistance

Fiberglass fades when exposed to sunlight and is also not defensive against the harmful radiations of the sun. Sunlight causes its fibers to deteriorate, thus leading to discolouration and weakening. On the other hand, polycarbonate roofing can let in enough light of the sun while protecting the indoors from the UV radiations as it has a UV protection layer on one of its sides. In addition, polycarbonate does not have any fibers, thus its colour and strength are maintained when exposed to the sun.


Polycarbonate weighs 40% lesser than fiberglass, which is very significant when it involves the two main factors of shipping and installation. Because of its light-weightiness, the shipping costs are considerably reduced and it also makes installation easier.


Fiberglass when damaged, broken or worn out ends up in landfills, while polycarbonate can be recycled and processed for re-use in such cases. So, now you can decide as to which option is going to be more environment-friendly.