Hightop Syncro Skylight

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rollercoaster
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Hightop Syncro Skylight

Post by rollercoaster »

I would like to replace the skylight on my Syncro Hightop,
as it is likely to get quite a few branches ripping at it..
Any recommendations?
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davidoft1
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Re: Hightop Syncro Skylight

Post by davidoft1 »

factory high top? , Ive got a fiamma one, double skinned so if it gets damaged its not likely to be through both skins and leak

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rollercoaster
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Re: Hightop Syncro Skylight

Post by rollercoaster »

Bit like a factory one..
its a fiamma up there now.
Might bolt some "branch sliders" down the sides?
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Re: Hightop Syncro Skylight

Post by Aidan »

fiamma make a deflector, meant for wind to reduce noise but might be enough to take the branch hits and deflect, whatever you fit it probably wants to be fitted through the skin to something substantial or you risk breaking the high top or ripping off the deflector with some of the roof attached depending on how you attach them to the roof
maybe easier to just trim the trees :ok

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rollercoaster
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Re: Hightop Syncro Skylight

Post by rollercoaster »

Agreed.
The more I look at it the more I want to strengthen the surround of the skylight mounting space,
and would quite like the roof rails, branch sliders to fix very solidly, in case I tie stuff to them.
Its a fine line though, more weight up high is not good..
Would be better to just find a very sturdy skylight/vent.

I do like trimming trees.
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rollercoaster
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Re: Hightop Syncro Skylight

Post by rollercoaster »

So its done,
a few notes.

The newer Fiamma skylight that replaced the old one was much better design,
less likely to catch branches by far and a better seal etc. So less worries..

The job turned out to be more involved because of a few things.
The roof had sunk in that area and water was pooling around it, aiding the leak.
(roof manufacturer had made a flat area to let the skylight into)
I needed therefore to makes a new large plywood inner to support the skylight.
When I wanted to clean up the old edge after removing the old skylight,
it was good to have the strong plywood support underneath to work against.
I used a combination of scraping and then stainless scourer to clean up the old sealant,
followed by a dose of white spirits and repeat until it was as perfect as possible.
The hole that I found under the old skylight was bigger than I would have liked,
and it might have served my to have made a plate to cover it and cut a new hole.
In the end I fitted it with plenty of new silicone and its ok.

Satisfying result for not a lot of effort or money, well worth doing.
My worries about the branches were based on what I had there,
this one seems capable of handling most things.
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Emerald84
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Re: Hightop Syncro Skylight

Post by Emerald84 »

Hello rollercoaster, well done on replacing the skylight. Like yours, my (elevating) roof has subsided over the years, with rainwater pooling around the skylight. Could you share a few details of how you reinforced the roof from inside?

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rollercoaster
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Re: Hightop Syncro Skylight

Post by rollercoaster »

I cut a piece of fairly thick plywood that exactly fitted the skylight
and extended to what seemed strong roof, due to the reinforcing curves in fibreglass,
then I not only screwed the skylight through to the ply,
but screwed through from the outside of the roof, with big washers and sealant,
from the strong areas into the ply.

I can try and take some pics in daylight tomorrow if that helps.

Was unsure how the interior was going to work,
but now I want to trim the plywood edges so they are rounded.
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Re: Hightop Syncro Skylight

Post by Emerald84 »

Thanks for this explanation, I'd be glad to see a picture but only if you have a moment. One of those jobs that keeps growing!
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rollercoaster
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Re: Hightop Syncro Skylight

Post by rollercoaster »

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rollercoaster
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Re: Hightop Syncro Skylight

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rollercoaster
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Re: Hightop Syncro Skylight

Post by rollercoaster »

Checking, there is still a slight dip there,
wether because it always was from new I am not sure,
the moulding is a bit like that..
Anyhow you can see, on mine anyway,
the shape adds a bit of strength just where its screwed in.
Unfortunately the ply or whatever sheet you use,
needs to be pretty strong,
partly because its also got a big hole cut in it!
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rollercoaster
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Re: Hightop Syncro Skylight

Post by rollercoaster »

I suppose what I am not saying, as you have one already thats probably the same,
is that there is a flat area on the curved roof, and this is the area that I reinforced.

I did not realise how badly it was leaking until I started dismantling the interior,
and even after that the side windows surprised me how much they were leaking too.
It was all making its way into the "bilges" where the hightop meets the roof gutters.
Not a good thing at all. Very glad its sorted now.
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Emerald84
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Re: Hightop Syncro Skylight

Post by Emerald84 »

A very neat job, I'm glad it worked.

I hope to manage something similar once I've braved my local B&Q. Once the roof is cleaned up, I'll be attaching my skylight with mastic tape and sikaflex, and I might seal the old fixings as well while I'm up there, as you have.
1984 LHD T25 pop-top with early '80s Golf/Passat engine.

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rollercoaster
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Re: Hightop Syncro Skylight

Post by rollercoaster »

There was a wooden frame that the skylight screwed into
and it was same depth as the ply, a kind of 1" x 1"
but it had mostly rotted away where the water was getting to it.

Hope yours is not a can of worms like mine,
but do make allowances for if it is.
Choose a run of good weather!
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