Replacing roof on coop advice

Hiya im a newbie but had my 3 goldlines for 8 months.
Need any advice or opinions on re roofing my coop, it has a sloping roof at the moment in felt, with very thin wood underneath, was thinking maybe a tongue n groove type roof? any ideas appreciated  :happy:

Mine needs a new roof and I'm going to use onduline.

sorry to sound thick but whats that?

Oh thankyou much appreciated have seen this type in the DIY shops, will look further 
Trying to get to grips with the site and posting etc so sorry for the delay in replying  :happy:

Like me then lol 

Try to avoid tongue & groove boards and lapping boards as these are red mite des-res. If you need to back the onduline a piece of painted plywood will have less nooks and crannies for nasties to hide in.

i have been given some expert advice by foxy on what to do with my roof only prob is this blinking weather . my roof is damp the house is damp although i have managed to place a couple  of boards on the outside to stop the drips getting into one  side of the house for now , my roof at the mo is part of the old wooden roof that was once the apex and a massive sheet of tarpaulin folded over 5 times its that large  i soooooooo cant wait to get it sorted though .