I used the ‘dry ridge’ system on the house I built; ventilated rolls that let vapour through from the roof space but keeps water out.

The butyl tape sticks to any roof tile extremely well. It doesn’t have the look of a pointed ridge, but it wont crack or fall out either.

I’d use it again. I would use Rockwool here instead of Hybris, reviews say Hybris has better thermal conductivity, but Rockwool can be used for both insulation and sound-proofing, and it’s easier to fill gaps with it.

Also, Rockwool will not burn, nor absorb water, Matt Risinger made a demo on one of his videos.Anything that is safe and makes building or repairs easier is good in my book.

I keep watching these, thinking I will see my idea on here that someone else has pulled from the ether.

Yet, I still never see my idea, just dancing around the possibilities.So great concept for the water filtration but it’s not uncommon to have engine oil leaks and spillage of diesel or petrol in car parks for various reasons. Surely there is not enough filtration and treatment built in for it to not require any further.