sun tunnel

Groovejet · 12 Jun 2021

What is best to buy? Web sites say conflicting things. Like Velux has poor light efficienvcy? As low as 5%?? That sounds crazy? Also it looks like Rigid is better than flexable? And Flat or Domed termination? Which is best?
Also i just seen that Wicks sell a few sun tunnels also. Has anyone got experience with whats a good choice?

catlad · 12 Jun 2021

I have fitted a lot of velux sun tunnels and had good feed back, for best results they need to be orientated to the sun.

Groovejet · 12 Jun 2021

So that is true then? i read its best South facing? is it a massive detroment not doing this?
Also is Rigid best?
A comment i read saying, velux arnt very efficient, through me. i thought wow, i didnt expect that

datarebal · 13 Jun 2021

None really impressed me that much . We have fitted many.
I'd say velux are one of the better , they gave glass rather than plastic which discolors over time .
Positioning is important

Groovejet · 13 Jun 2021

ive only got on position to work with. roof is half apex( dunno if thats correct name). pitched one side then gable end other. ill have to check direction....south yeh?

noseall · 14 Jun 2021

Groovejet said:
Also it looks like Rigid is better than flexable?

At light reflection - yes.

Ease to the fitter - NO.

Groovejet · 15 Jun 2021

noseall said:
At light reflection - yes.

Ease to the fitter - NO.

Right ok! The landing is part their old terraced house extension. No loft hatch. So im doing initial look blind. I need to remove a few tiles, to check. Hopefully i can position flashing as close to the first tiles, below the ridge, to get more light. It may work great? Straight above top of stairs is the position i could fit it? Then direct above that, would be the tiles i can remove.
Maybe this could be 1st job that goes very smooth? And no hidden supprises? Hmmmmmm!! lol

noseall · 16 Jun 2021

Groovejet said:
And no hidden supprises?

Access is vital.

You need to consider..

Where the tunnel will pass through the rafters.

How it will be positioned on the tiles - in relation to the tile coursing and lateral positioning and not too close to ridges or valleys etc. The top lens and cradling is quite large.

How it will pass through the ceiling joists and ensure it is clear of pipes and cables.

Look at how it will centre on the ceiling below and that the ceiling is clear of fittings also.

At least with the flexi-tunnel you have some wiggle room. I'd only go for rigid tube in a new roof with a dedicated zone.

datarebal · 16 Jun 2021

Flexi all the way

Groovejet · 17 Jun 2021

noseall said:
Access is vital.

You need to consider..

Where the tunnel will pass through the rafters.

How it will be positioned on the tiles - in relation to the tile coursing and lateral positioning and not too close to ridges or valleys etc. The top lens and cradling is quite large.

How it will pass through the ceiling joists and ensure it is clear of pipes and cables.

Look at how it will centre on the ceiling below and that the ceiling is clear of fittings also.

At least with the flexi-tunnel you have some wiggle room. I'd only go for rigid tube in a new roof with a dedicated zone.

Great, everything been covered now...cheers

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