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Hi Can anyone tell me if tile vents on their own are going to be sufficient or will I need soffit vents as well. Also, does the wet insulation need to be stripped out and replaced with dry or will sufficient ventilation dry everything out. When we last looked under the membrane (which...

Thanks for your reply Noseall Would this still be the case although the patches get worse after heavy rainfall?

I have a pitched roof on an extension that was built in Nov 2010. It has two velux windows in the roof also. When the builder installed the insulation, it had lain on my back garden for two days and got soaked in the rain so it was therefore put in when wet. When the inside ceiling had been...