Seeking advice on skylight tunnel

Manuel

Hi,
Our two-storey house is being built. At this stage the slate roof is on
and the internal plastering is done. Now we reckon the stairs is very dark, and are considering asking the builder to cut out a skylight tunnel from
the landing ceiling over the stairs.
What would you reckon would be a reasonable cost for such a job?
Any advice on the details, e.g. possibly getting a sun-tube rather than
creating what I guess would be a plasterboard tunnel in the attic?
The roof pitch is 30 degrees and the joists are 2 feet apart.
Thanks!

qazxsw

Not a reply to your question re price, but a few thoughts

• If you have a choice put the window / sky tube on the sunnier side of the roof

• My chippies reckon sky tubes aren't worth the money w.r.t. light gained and only use as a final option when a roof window won't work.

• You could use a flared tunnel and roof window (velux/careys/fakro) - various style flared tunnels found page 6 this pdf
  
  
  
  
• If using a roof window make it big enough, or at least flare the tunnel wide enough - you can't expect a burly plasterer to work miracles and imitate a chimmeny sweep from oliver twist!! if you do you'll end up with a badly plastered tunnel sides.

pbergin

Depending on the position of the window, you might need planning permission. (e.g. if the window is at the front or if it overlooks another house)