Duetto roof lights

Hi Firstly yes I do have a lovely green roof. Now sprayed with Wet and Forget, I keep you posted if it works evidently it will remove green algae  without scrubbing. 
But I have a problem with all the edgings of the roof lights they are just crumbling away. The upright part shown in the picture. 
is this part --part of the roof light or part of the van body? 
Liz
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It's part of the roof lights.

I think you may need the services of Messrs O'Leary, unless any Duetto owners know of a better plan.

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WOW, I thought my roof was clatty. 
Boaby

Ah thank you both, I've posted a picture of my roof just to 
 you all feel better. But it will be clean soon.

O Learys is just a bit too far there must be someone around Hampshire

It's a standard caravan roof light, any caravan dealer should stock them.

As Paul says, most caravan dealer accessory shops stock them but i highly recommend this chap; [You must be registered and logged in to see this link.]

Glasgow based small business and i've bought lots of stuff from him because even with postage, his prices are cheaper than what i can get locally! He's well known for his competitive and fair prices so it's well worth giving him a call.