LIEFbristol

It's a tight space but once it's all done it won't be seen

Thanks for the great info, tried and tested too. It's quite a fiddly spot and this seems more doable.

Cheers thanks for the info, spray foam seems to be the go, I'll try a bit on the polystyrene first to see if it reacts. I'm planning to take her out onto hard standing for a few months and redo all the windows and installation in the warmer months. Working on the leaky window, tape is holding well for now, condensation is becoming more of an issue hence the post.

Hi, I've just purchased a narrowboat and have noticed under the gunnels the polystyrene sheets have begun to perish. The spots seem to correspond to leaky windows nearby (another job on the list, bodged with tape at the moment). What would be the best way to reseal these areas to stop cool spots and condensation forming? Regluing on polystyrene is one option I'm looking at, using aluminium tape to cover any gaps. I'm currently living aboard and plan in the summer to redo the lot but looking at an interim fix for now. Cheers