Hi roofer won't charge any extra to fit (well ours didn't) if he's priced to do the roof one or two roof lights shouldn't be any extra.
Would recommend you add 2 big ones though (if your roof joyces allow - check with your carpenter first) - they make a huge difference and the light is excellent.
Ring any builder provider and ask them to give you a price then per the size ye decide on or go on to the Velux website. We got ours from McMahons they were the cheapest, ours worked out about 300 including the flashing for each one I think? (We bought 8 of varying sizes so I'm not 100% on the price)
Aah - a subtle reference to the joke about an arts student who goes onto a building site to look for a job and is asked by the foreman "so what's the difference between a Girder and a Joist?"
To which the student said "Goethe was a key figure of 18th/19th century German literature and is famous for his work Faust, whereas Joyce was a famous early 20th century Irish writer most famous for the novel Ulysses"
Aah - a subtle reference to the joke about an arts student who goes onto a building site to look for a job and is asked by the foreman "so what's the difference between a Girder and a Joist?"
To which the student said "Goethe was a key figure of 18th/19th century German literature and is famous for his work Faust, whereas Joyce was a famous early 20th century Irish writer most famous for the novel Ulysses"
Hey Superman! Let me elucidate for those people who do not understand 'cockneyspeak' or 'estuary english' as it is known. A Cockney would pronounce a GIRDER as a GUYTHE while most people have a lapover between joist and joyce. This one I heard in London in the early 70's, about the "thick Paddy" that came on site looking for a start. The foreman on site may have been confused by the answer but every pub would shake would shake to the rafters when it was told. Especially educated Cockneys. Cheers!