Permavent - not heard of that before, ta. http://www.roofingsuppliesuk.co.uk/pitched-roofs/permavent-breather-membrane-1-5m-x-50m/
- £50. Maybe 25 of us could split it between us, £2 each - bargain
Tyvek... washing machine... took mine into the bath with me when I bought it. Got some baffled looks from Mrs Perrin (no change there then) but as you say it did the trick. Trouble is it smells of rose-scented bath oil now
Nearly bought one of these bathtubs as per reviewed by Cap'n Bearbones: http://bearbonesbikepacking.blogspot.co.uk/2016/03/tried-and-tested-trekkertent-bathtub.html
but am sticking with my tyvek for the moment. "Bath" and "tub" seem apt words if it's not fully covered by your tarp and a spot of precipitation comes your way in the night.....
"There comes a time in your life Ponsonby, when you think: 'My God, I'm two-thirds of the way to the grave and what have I done?" - RIP
"Mountain biking is silly" - Mrs Perrin