Dear Readers,

Final request for imput

What follows is my plan of action to solve condensation dripping from a metal corrugated roof.
This is a compilation of imput from readers who have added their experience.

I am nearing the start date for this project, please add your experience to help make this project as successful as possible.

Description of building; Garage, 6m square, inclined roof of metal corrugated sheeting, rising to apex 1 metre higher than eves. Unheated, no source of condensation from machinery, heating etc, DPM in concrete floor. Normal ventilation through unblockable gaps in up and over doors etc.

Proposed work; Attach 2" thick flame retardant polystyrene sheeting to underside of corrugated sheets, minimum gap. Seal wherever possible to prevent condensate leaks. Then add blue polythene sheeting, 1000gauge, held in place with wooden battens or similar, as closely as possible to polystrene sheeting. At eves, remove corrugated fixing screws, feed sheeting under eves edging , trim off when clear of external walls. replace screws though roof and polythene sheeting.

Thanks to the readers who have helped get to this stage.


I would be extremely grateful for your final imput.

Paul