Anyone ever walked on a roof? How do you do it?

[fourwalls]

We want to fix a bit of loose cement near the ridge tiles on our house. It's a bungalow so not as scary/crazy as it could be! But... we've never been up on a tiled roof before and are a bit worried that all the tiles will start slipping out from under our feet and end up in a pile in the garden!
How easy is it to walk on a roof? Are the tiles usually nailed down or do they move under you when you walk? We had a tv aerial put up and the chap just put a ladder up to the wall stepped onto the roof and walked up to the chimney!
But it all looks easy in the memory - knowing my luck, I'll panic and lie down flat and slide down backwards.
Anyone got any top tips?
The roof looks like this one - with these wee red tiles:
www.rightmove.co.uk/property-for-sale/property-39128888.html

This is obviously for people who have to work on roofs, but it might have some info you'll find useful?

www.hse.gov.uk/pubns/indg284.pdf

Those tiles will not move if you walk on them but there is always a risk you might break some by walking on them. If you can walk along the ridge or hip tiles (the half round ones) you'll be a lot safer. Please be careful.

That HSE link is terrifying!

Actually, it would be just my luck to fix the cement and then crack half a dozen tiles getting down.

I might be going off this idea - perhaps it's better to get someone in.

it is usual, when working on a roof, to break more tiles than were broken before you started.

sometimes a tile you step on will break or slide and you will fall off.

I think I'd ask around for a recommended local roofer with an established real-life address and phone no (not an itinerant with a mobile and no address)

You're right - it has a feel of the Frank Spencers about it - I might end up putting all the tiles out in the morning!