Last summer I installed some decking. Admittedly the slope I used wasn't steep enough towards the lower end but it was fine last winter. This winter, some of the boards are not draining at all at the lower end so there are puddles.
What I don't understand is:
- why ok last year but not this?
- why only some boards when all on same slope?
- why have boards expanded out at the edges and made themselves concave? This makes drainage worse as it cancels out the slope in the other direction, going against the shallow grooves, which annoyingly I did much better than the main direction slope.
I am not sure how to correct it now, other than strip off all the boards and readjust the feet that sit on the old patio. There are about 40 feet and then 15 x 5m boards so not a minor job! Anyone have any alternative ideas? How urgently do I need to address the drainage as I've read it affects its lifespan?
What I don't understand is:
- why ok last year but not this?
- why only some boards when all on same slope?
- why have boards expanded out at the edges and made themselves concave? This makes drainage worse as it cancels out the slope in the other direction, going against the shallow grooves, which annoyingly I did much better than the main direction slope.
I am not sure how to correct it now, other than strip off all the boards and readjust the feet that sit on the old patio. There are about 40 feet and then 15 x 5m boards so not a minor job! Anyone have any alternative ideas? How urgently do I need to address the drainage as I've read it affects its lifespan?