Thread: UVA UVB Sun exposure through sunroof

Originally Posted by savagst

Hi Guys,

We have a Disco 3 HSE with the 3 sunroofs. Does anyone know how much UVA/UVB exposure comes through these panels??

If you mean through the glass, Automotive glass blocks almost all UVA and UVB.

So much so that many Australians have low vitamin D, because they spend most of their time indoors or in vehicles, so don't get exposed to enough UV.

Broadly speaking, UV-A is the more damaging one, does most of the skin wrinkling, deeper penetration due to longer wave-length, and more active in DNA damage to the skin cells which is Bad News...

UV-B stimulates Vitamin D production, and tanning. - If you MUST use a tanning bed, you want one that generates "B" ONLY.

Gentle tanning, has been shown to protect the skin from UVB-A and damage.... but the emphasis is on sensible, gentle tanning, NOT .....!


Ordinary window glass passes UVA, but blocks UVB.

- This is not good news if you want a gentle tanning... and even worse if you're worried about skin cancer or just wrinkling.

Office workers who are placed near a window can be more in danger than outdoor workers wearing hats and long sleeves...

I have no idea if automotive glass (toughened or laminated) has the same characteristics regarding UV-A/B as 'ordinary window glass' or 'plate glass'.
The tint - if any - in your roof glass may also absorb (or not...) UV-A/B

How MUCH UV gets through is something else again...