Polycarbonate Roof FAQs (2024)

Polycarbonate roofingis a versatile means of protecting and sheltering the likes of conservatories, greenhouses and porches and more. Strong yet lightweight, this robust material is an excellent alternative to glass roofing – but what do you need to know about polycarbonate roofing?

The BC Profiles team have put together a list of quick-fire polycarbonate roof FAQs to answer all of your burning questions.

An incredibly popular product,Axiome polycarbonate roofingis pre-prepared for installation and use, but you must read up on just how to fit them before starting your project. You can do so by browsing theAxiome installation guide.

Whether you need to replace a slipped or broken panel or undertake some cleaning and maintenance, on occasion you’ll need to remove a polycarbonate glazing bar. Here’s how:

  • Remove the rubber gaskets
  • Remove glazing bar end caps
  • Lift the glazing bar cap
  • Slife the polycarbonate roof panel out

Some companies will supply oversized polycarbonate sheets measuring at 6050mm x 2050mm, but generally speaking, you’ll find that the largest sheets available from most retailers is 6105mm x 1000mm.

How to join polycarbonate sheets

You’re able to join together two polycarbonate roof sheets with the aid of glazing bars from the likes ofSnapa.

Given its shape, polycarbonate sheets are simple to cut, but thanks to the robustness of the material you will need some help from tools. A circular saw is the best tool for cutting polycarbonate roofing, though you can also use a jigsaw.

16mm polycarbonate sheets have the same clarity and transparency as glass with the added benefits of being half the weight and high impact resistance.

A pliable material, polycarbonate roofing sheets are ideal for use on curved roofs at a fraction of the cost of glass. To bend polycarbonate sheets, you’re able to use a heat gun to manipulate the material, though you should always measure angles carefully.

Polycarbonate roofing is resistant to heat and designed to reduce UV radiation. In summer, polycarbonate roof sheets can reduce the sun’s heat by up to 69%.

So long as polycarbonate roofing has been installed properly and is sufficiently maintained, you can expect these hard-wearing sheets to last up to 20 years.

Polycarbonate roof sheets are not designed to support the weight of a person and so you should avoid walking on them. If you do need to access the roof sheets, use crawl boards between the rafters or step ladders as a safe means of doing so.

Concerning polycarbonate roofing, you should only use a 100% silicone sealant that has been specifically formulated to properly bond with the polycarbonate’s coating.

You’re able to seal the ends of polycarbonate roof sheets by using end caps.

You can screw into polycarbonate sheets; woodworking drill bits are recommended for this. Drill patiently and steadily for a smooth entry and also use an unwanted piece of wood or acrylic as a backstop underneath the polycarbonate to ensure you do not blowout and crack the panel.

Generally speaking, all polycarbonate roofing reduces the effects of the sun and provides shade. However, certain colours and tints will offer more shade; for example, the likes of clear polycarbonate is designed to provide superior light transmission, making it ideal for the likes of greenhouses.

Polycarbonate roof sheets are an excellent insulator and also great at reducing noise too; with quality light and solar transmission and high thermal retention, they’re incredibly energy efficient.

If you’re searching for more information on polycarbonate sheets such asAxiomeandAxgard, browse our guide on thebenefits of plastic glazingon the BC Profileshelp and advice page.

Polycarbonate Roof FAQs (2024)

FAQs

What is a major disadvantage of polycarbonate sheets? ›

One downside to polycarbonate sheets is that they are not scratch resistant and denting or scratching on the surface is possible if extra caution and care are not taken.

How long will a polycarbonate roof last? ›

On average, polycarbonate roof panels can last anywhere from 10 to 20 years. However, with proper care and maintenance, some high-quality panels have been known to last up to 25 years or even longer!

What is the maximum overhang for polycarbonate roof? ›

Panels should overhang 50 - 150mm maximum beyond the last screw line. Roof Pitch should be 5° (87mm per 1000mm) or greater ▪ Make sure the UV protected side faces out.

What is the maximum span of a polycarbonate roof? ›

As a rule of thumb, the thicker the twinwall sheets the wider you can span. However, there should be a general limit of 1050mm in most applications. Thinner Sheets (6mm, 10mm): More economical but require more support (rafter support at 450-600mm).

What are the problems with polycarbonate roofing? ›

Table of Contents
  • Polycarbonate Con #1: Difficult to clean and maintain.
  • Polycarbonate Con #2: Easily scratches.
  • Polycarbonate Con #3: Plastic roofs are very noisy.
  • Polycarbonate Con #4: Lacks any insulating properties.
  • Polycarbonate Pergola Roof Con #5: Little thermal efficiency.
  • Polycarbonate Con #6: Not Earth friendly.

Does it get hot under a polycarbonate roof? ›

The difference in heat penetration is staggering. Clear polycarbonate let's in approximately 85% of heat. Ouch! Whereas Level 3 “Silver Mist” only let's in about 18% heat.

What is better than a polycarbonate roof? ›

In terms of estimated lifespan, glass roofs have the edge over polycarbonate varieties too; glass can be expected to last for more than 20 years, whilst polycarbonate roofs usually last between 10 and 15.

Will hail damage a polycarbonate roof? ›

Resistant to very hot and cold temperatures, polycarbonate holds up exceptionally well to rain, snow and hail. The panels also last for years without fading or discoloration.

Do polycarbonate roofs leak? ›

However, like any other type of roofing material, polycarbonate roofs can leak if they are not properly installed and maintained.

What is the minimum fall on a polycarbonate roof? ›

When fitting multiwall polycarbonate on a roof a minimum slope of 5° (9 cm/m sheet length) is advised to allow for rainwater drainage. A 10° slope is preferred. When calculating your cut panel size remember to allow clearance for the central element of any glazing system being used and for thermal expansion.

What is the purlin span for polycarbonate roofing? ›

For curved structures, the maximum purlin spacing should be 750mm and a minimum radius of 6000mm for Corrugate profile. For walls, nogging spacings should be no more than 1200mm. Use Noise Stop Tape on all battens, purlins or noggings to minimise the noises associated with expansion and contraction.

How much do you overlap polycarbonate roofing? ›

When joining the sheets, overlap one and half corrugations for the corrugated profile. And one overlap for the Greca profile. Make sure that your overlap sequence is away from the prevailing wind.

How long does polycarbonate last in the sun? ›

The lifespan of a polycarbonate roof panel depends on the amount of sunlight it receives. Most clear roofing sheets are rated for 10-20 years and can last up to 30 years if installed in a shaded area. The installation and maintenance of polycarbonate roof panels determine how long they will last.

What is the spacing for rafters on a polycarbonate roof? ›

TUFTEX PolyCarb™ panels can span 36-inch on center cross bracing. SeaCoaster, UltraVinyl, and PolyCarb panels all require 24-inch spacing on rafters.

What are the negative effects of polycarbonate? ›

Is Polycarbonate Toxic? Most polycarbonate plastics used today are not toxic. Non-food-grade polycarbonates are considered hazardous when they come in contact with food due to the release of BPA during degradation when in contact with water. In the past, most polycarbonates were made by a combination of BPA and COCl2.

What should you not use on polycarbonate? ›

The following solvents/cleaners MUST NOT be used with polycarbonate: Trichlor. Acetone. Triclene®

What material is better than polycarbonate? ›

Compared to polycarbonate, acrylic has a higher tensile strength and UV resistance. Acrylic is less expensive than polycarbonate and is commonly used as a suitable alternative when impact resistance is not a key factor.

What is the life expectancy of polycarbonate structured sheets? ›

If a roof is well maintained, it can last between 10 to 20 years before it's going to need to be replaced. There are even instances where the polycarbonate roof panels have lasted 30 years. Polycarbonate has the capability to resist extreme temperatures, both cold and hot.

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