Hi, I've have bifold doors fitted and they sit below the damp course. On the outside the patio which is about to be laid will be around 150mm below the damp course with the bifolds being around 1 brick above. My issue is i'm unsure of the regs regarding this, I believe the patio will be fine even though it is up against the wall because it's 150mm before the DC. However will i need to install an ACO drainage channel where the bifold is or will pulling the slabs away and filling with stone meet regs. On that point should i leave a void all around and not put the slabs up against the house? Although this work is not being assessed by the building inspector other parts of the build will be and i'm scared he will pick up something here and he is a pain. Any advice appreciated.
Part H - Drainage and Waste Disposal section 2 covers paved area & water disposal. https://www.planningportal.co.uk/in...ments/71/part_h_-_drainage_and_waste_disposal Patio's do need building regulations approval, but you need to comply with water removal.
Probabaly remove the course or two of bricks below dpc, so threshhold on bifold doors sit flush with finish floor level in room. They should have used a threshold cavity tray.
Wondered how modern houses get to have their bifold doors/floor level and seamless with the patio outside. Can't help thinking that rain splashback and puddling can be a problem if not done right, or even if it is done right.
We had a thread on this last year were the water ran from the balcony, under the patio door & into the room, peep ended up lifting suspended floor because of the water. All could have been prevented by fitting a cavity tray, in the end they tanked the area with grp to solve problem.
Thanks for the advice so far. If the remaining areas are below the DPC do i need drainage or a gap between patio and wall. Or because it's an opening the only area that require drainage is around the threshold?
Forums
Facebook
Twitter
You Tube
Instagram
Shop