I am building a near-passive haus standard, 146 sq m living space house. I am retired, but never been busier.
I used to develop online teaching and learning resources for several northern universities. I also lectured in IT.
Nothing. Cos I'mAdickHead. I just followed the SUDS guidelines: they said
' ... use a sand bed to filter the run off ...'
So I did.
Instead of thinking about it - what could possibly come off the roof that would need to be filtered?
Nowt.
Thinking about it a bit, the pH of the sand might affect the water a bit but apparently not to it's detriment. For the last few years we regularly see four or five GCNs feeding on rising Dragonflies emerging from their underwater stage: stuck in the surface tension for just long enough to provide a meal. The sand also provides a nice wet area for the Dogwood roots.
But we have no need for sand at all.
Not much need for commentary : the pond is fed entirely from the roof run off. (SUDS)
Cost? Absolutely everything inclusive : £5 or 6 hundred. Tops
The sand (bulk bags) in the photo below is 'buried' under the garden as a filter for the roof run off. Its been working hard recently 😑
This is where that pipe in the photo above runs into the pond.
Overflow from here into the pond in the field below our site ( The one with the GCNs in )
Is it me, or is this thread still unnecessarily hard work ?
I ask because I think it a compliment if anyone responds to my posts. And that response - no matter how much I disagree with it - is a starting point for my own thinking.
Gentle responses are harder to draft when upset.
And yet.... and yet... houses do get built.
I think this thread is another data point underscoring the aphorism that;
Systems and people show themselves for what they really are when -not if- things go wrong
Ooooofffff, when I tried that, our builders ducked and dived, bobbed and weaved. Took me ages to learn the lesson. And just a little longer to sack them.
Thats how we found out that the guy who set out our plot made a one meter error.
So I paid him £1 less than he charged.
(But bought him a pint in the pub)