Roof felt question

[Tremain]

Hi,

I hope someone can help me work out what has happened and what i need to do in my loft space.

We have lived in this house for 6'years and over time these white patches have appeared on the inside of the roofing felt. Also had condensation dripping off the roof into loft space.

Do I need to replace the felt? Or shall i just get some ventilation?

Also just to note this only happens on northside of house.

Photos attached

Thanks in advance for any help advise on this one.

Cheers
Tremain [/b]

 

[KenGMac]

Tremain, Hi

Suggest you have a look on this site at the roof stairs and lofts section?

There is an entire section on roof condensation, may assist in getting you answers?

Ken.

 

[Alastairreid]

Try opening more of the felt laps on both sides, see if that helps.