Mar 27, 2017 4:50 pm
I need some advice from you - The Experts. Please HELP!!! Thank you.
My house is finishing soon and will have PCI in a week time. Me and my wife is very exciting with our new home.
When I visit the site on the weekend, I find few issues with the house and one of them is with the gutter drain pipe at the back of the house. Photo below.
All the other gutter drain pipes went straight into the ground. However, this one at the back go horizontal along the wall for 40cm then bend around the wall corner and go down in to the ground. The issue with that is I am planning to pave a footpath alone the wall and this pipe is so close to the ground so I cannot go above or under it.
Here is another photos I took earlier to show why it have to bend around. The extra concrete piece left from the slab is blocking the pathway. Photo below.
The concrete piece is left there since the slab is done and it is cause by the bad form work from the slab. I thought the builder is going to cut the extra piece out before laying the pipe.
My questions are
1, Is the current pipe work build according to the building standard, is there any regulation regarding the depth of the drain pipe need to bury underground, it is just 1 brick height under ground level now?
2, Can I demand the builder to cut the extra concrete off as it is from bad slab work, even it is buried underground and cannot be seen. I will have to paid to remove it in the future when I try to pave that area as the ground may sink differently.
As I know nothing about building myself. It is hard for me to judge the finished work. Is the builder doing the best he can for the problem or it is just some lazy builder who try to hide the wrong doing? I need advice from some experience builder in this forum, will you do as what his builder did or what you will do to fix the issue? How much it will cost me to fix that in the future.
Thank you for reading and really appropriate anyone can give me some advice.
Have a nice day ^_^
Re: Need expert advice - new house drain pipe issue3
Mar 29, 2017 11:06 pm
It is about 2 brick size including the bit around the corner. Measured length is about 40cm.
I was planning to pave in that area and the pipe is blocking the way. Can I made the builder cut the concrete and redo the pipe? It is a new house and not settle yet.
Re: Need expert advice - new house drain pipe issue4
Mar 30, 2017 11:06 pm
Can you make him? Not unless the paved area is shown on the design and in the contract. Would be difficult to cut as the side course of bricks is sitting on the bit of concrete.
Re: Need expert advice - new house drain pipe issue5
Apr 11, 2017 5:23 pm
nope - 300mm min not 10cm, needs to drain to kerb AS/NZS:3500 states this as does your local DCP/council.
it will also be in your contract that the SW will drain to kerb or easement. No flexi pipe should be used. Surprised it not connected to a rainwater tank, assume this is because you have recycled water.
anyway crappy finish and I hope you didn't accept PC
Re: Need expert advice - new house drain pipe issue6
Apr 11, 2017 10:03 pm
Strange. I thought AS/NZS 3500.3.2:2003 "Stormwater Drainage Acceptable Solutions" mentions single dwelling no load is 100mm? Anyway doesn't matter i'd say the bend is above ground if that makes any difference in this situation.
Re: Need expert advice - new house drain pipe issue7
Apr 12, 2017 12:32 am
Berek, you are correct.
For a single dwelling, if the stormwater pipe is not subject to vehicular loading and there is no paving, the pipe must be buried a minimum (from the finished surface at the top of the pipe) to a depth of 100 mm.
If the area is to be paved with brick or un-reinforced concrete, the pipe must be buried from the top of the pipe a minimum of 50 mm below the underside of the pavement.
For other than a single dwelling, it is 300 mm.
The required distance from the damp proof course (DPC) to the finished ground level must also be taken into account, the distance varying depending on the type of finished surface, whether it is under cover or not and whether it is in a low intensity rainfall area or not. A low intensity rainfall area is defined as one that has a 1:20 Average Recurrence Interval (ARI) of 120mm/hour or less. The ARI is based on an average rainfall intensity over a five minute period.
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