Browse Forums Building Standards; Getting It Right! Re: Wall cracks, building footpath as per CSIRO BTF18 2Jan 22, 2022 4:31 pm Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Wall cracks, building footpath as per CSIRO BTF18 4Jan 22, 2022 6:19 pm 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Wall cracks, building footpath as per CSIRO BTF18 6Jan 22, 2022 8:49 pm 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Wall cracks, building footpath as per CSIRO BTF18 8Jan 22, 2022 10:59 pm During wind driven rain on the weather side, the path will also be draining water off the wall and the amount can be considerable. It is best to have a drain that will go to a silt pit (as per the regs) which then connects to the stormwater. It is never good to let water drain to a sump at the side of a path. Do you know your soil classification? If the water will drain off the path and down a slope, then you could forego a drain. Just tell the concreters that you want the path laid with the compliant slope, you have the documentation to show them. Non adherence to compliance can bite hard if something goes wrong and insurance becomes involved but your house is 40 years old and the cracking has probably happened before and then receeded. Many houses have cracks, it isn't uncommon and there are a myriad of house cracking threads on H1, some serious but many not serious. Let us know how it is in 12-15 months time. Re concretors not knowing the regs or how to do simple arithmetic, you would be shocked to know how widespread it is for concretors plumbers and builders etc to have poor regulatory knowledge. Good luck. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Wall cracks, building footpath as per CSIRO BTF18 9Jan 23, 2022 11:40 am SaveH2O During wind driven rain on the weather side, the path will also be draining water off the wall and the amount can be considerable. It is best to have a drain that will go to a silt pit (as per the regs) which then connects to the stormwater. It is never good to let water drain to a sump at the side of a path. Do you know your soil classification? If the water will drain off the path and down a slope, then you could forego a drain. Just tell the concreters that you want the path laid with the compliant slope, you have the documentation to show them. Non adherence to compliance can bite hard if something goes wrong and insurance becomes involved but your house is 40 years old and the cracking has probably happened before and then receeded. Many houses have cracks, it isn't uncommon and there are a myriad of house cracking threads on H1, some serious but many not serious. Let us know how it is in 12-15 months time. Re concretors not knowing the regs or how to do simple arithmetic, you would be shocked to know how widespread it is for concretors plumbers and builders etc to have poor regulatory knowledge. Good luck. Thanks so much! I'm not sure what class the soil is. So I can't make a mistake if I ask them to build 1m footpath with 50mm slope, even though engineer asked for 17mm (1:60)? So I will give the concreters the following instructions: - 1m footpath to the right and back of the house, 80-100mm thick, - Rip the existing 500mm footpath to the front of the house and build 1m footpath as above, - Put sealant between house and footpath. Use ableflex between house and apron? - Use plain concrete, - Ensure minimum 75mm between bottom of weep holes and top of concrete footpath, - Install spoon drain (at all sides of the house) that will drain into storm water rises at the perimeter of the house. - 1m apron with a spoon drain at the end of the fall will have 50mm fall away from the house, - 16mm deep expansion joints every 3 metres. Does the above make sense or have I missed important information? Re: Wall cracks, building footpath as per CSIRO BTF18 10Jan 23, 2022 11:49 am SaveH2O During wind driven rain on the weather side, the path will also be draining water off the wall and the amount can be considerable. It is best to have a drain that will go to a silt pit (as per the regs) which then connects to the stormwater. It is never good to let water drain to a sump at the side of a path. Do you know your soil classification? If the water will drain off the path and down a slope, then you could forego a drain. Just tell the concreters that you want the path laid with the compliant slope, you have the documentation to show them. Non adherence to compliance can bite hard if something goes wrong and insurance becomes involved but your house is 40 years old and the cracking has probably happened before and then receeded. Many houses have cracks, it isn't uncommon and there are a myriad of house cracking threads on H1, some serious but many not serious. Let us know how it is in 12-15 months time. Re concretors not knowing the regs or how to do simple arithmetic, you would be shocked to know how widespread it is for concretors plumbers and builders etc to have poor regulatory knowledge. Good luck. Sorry to ask so many questions! I'm totally confused and struggle to find anyone that can help. Below are pictures of the driveway, at the back of the house and on the RHS. 1. The land at the back of the house slopes towards the house. Do I need to do anything here with the land or just build apron with spoon drain? 2. Do I need spoon drain to the right of the house? 3. Can I just leave driveway as is or do I need to confirm the slope of it? Thanks so much! Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Wall cracks, building footpath as per CSIRO BTF18 11Jan 23, 2022 12:28 pm lukazi So I can't make a mistake if I ask them to build 1m footpath with 50mm slope, even though engineer asked for 17mm (1:60)? 1:20 slope over 1 metre = 50mm slope. The engineer didn't know his elbow from his assets. lukazi - Install spoon drain (at all sides of the house) that will drain into storm water rises at the perimeter of the house. A stormwater riser increases the height of a stormwater pit. I assume you already have a pit. All else sounds good. Just discuss everything with the concreter and keep Emails. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Wall cracks, building footpath as per CSIRO BTF18 12Jan 23, 2022 1:10 pm I would replace the hoist with a more compact pull out type of line away from the main focus area and then improve the soil's friability. Make the soil work for you. You could easily transform that whole back area into a suburban oasis with some more plantings and discreet swales etc. It is always a good idea to have a drain alongside an impermeable path. Apart from giving the driveway a water jet to improve aesthetics, there is no need to spend money. First, that clear water tank will grow algae unless you either paint or cover it. A path down the side will also reduce maintenance. Is there a constant slope? The concreter should know how a drain will be laid. The engineer's report states that you are on highly reactive soil, did he take any soil samples? He was probably using local knowledge but I would be taking it seriously. A council engineer might be able to confirm the soil classification. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Wall cracks, building footpath as per CSIRO BTF18 13Jan 23, 2022 2:00 pm SaveH2O lukazi So I can't make a mistake if I ask them to build 1m footpath with 50mm slope, even though engineer asked for 17mm (1:60)? 1:20 slope over 1 metre = 50mm slope. The engineer didn't know his elbow from his assets. lukazi - Install spoon drain (at all sides of the house) that will drain into storm water rises at the perimeter of the house. A stormwater riser increases the height of a stormwater pit. I assume you already have a pit. All else sounds good. Just discuss everything with the concreter and keep Emails. Thanks so much, your comments have been priceless! The engineer asked me to take pictures of the cracks every 3 months, with the ruler over them, and in 12-24 months send those photos to him for an assessment. Do you think I should find a different engineer and start from the scratch (considering this one didn't know the basic thing such as which standard to apply)? I also asked the engineer if I can just monitor the cracks over the next 12 months (without building the footpath) and if cracks are not getting bigger, don't even worry about building the footpath. He said how this would be ok. Do you think this is acceptable (don't build footpath at this stage but just monitor)? I don't have a stormwater pit, I do have stormwater rises (which are I believe used for inspections and flushing). Can I still use spoon drains at the end of concrete? Re: Wall cracks, building footpath as per CSIRO BTF18 14Jan 23, 2022 2:08 pm SaveH2O I would replace the hoist with a more compact pull out type of line away from the main focus area and then improve the soil's friability. Make the soil work for you. You could easily transform that whole back area into a suburban oasis with some more plantings and discreet swales etc. It is always a good idea to have a drain alongside an impermeable path. Apart from giving the driveway a water jet to improve aesthetics, there is no need to spend money. First, that clear water tank will grow algae unless you either paint or cover it. A path down the side will also reduce maintenance. Is there a constant slope? The concreter should know how a drain will be laid. The engineer's report states that you are on highly reactive soil, did he take any soil samples? He was probably using local knowledge but I would be taking it seriously. A council engineer might be able to confirm the soil classification. I'm not sure about the slope. I live in WA. Is there a way to check this online? The engineer didn't take soil samples. Would the course of action be different for a different soil type? I think he said how the whole of Melbourne is sitting on reactive clay. Re: Wall cracks, building footpath as per CSIRO BTF18 15Jan 23, 2022 3:26 pm lukazi The engineer asked me to take pictures of the cracks every 3 months, with the ruler over them, and in 12-24 months send those photos to him for an assessment. Do you think I should find a different engineer and start from the scratch (considering this one didn't know the basic thing such as which standard to apply)? That advice is spot on. Retain him. lukazi I also asked the engineer if I can just monitor the cracks over the next 12 months (without building the footpath) and if cracks are not getting bigger, don't even worry about building the footpath. He said how this would be ok. Do you think this is acceptable (don't build footpath at this stage but just monitor)? He has most probably considered the house age, the probable soil classification, last year being a wet year and this now being summer when giving that advice but I would think that given there is evidence of past movement, protecting the slab is something that is better done late than never. Just bear in mind that I am not a structural engineer but there are other forum members who are and hopefully some will also contribute to the thread. lukazi I'm not sure about the slope. I live in WA. Is there a way to check this online? Do you have anyone in Melbourne to manage this for you? How will you measure and monitor if you live in Perth? With the house lights on in the sevcond photo, I take it that it is a RE photo and you have recently bought the property. If so and if it is also vacant, just be aware about clauses in some insurance policies when a house has been vacant for longer than 3 months. lukazi IThe engineer didn't take soil samples. Would the course of action be different for a different soil type? I think he said how the whole of Melbourne is sitting on reactive clay. The Melbourne western suburbs where the house is are known as being reactive to highly reactive soil areas. I personally would do something pre winter and it appears that the engineer didn't say not to. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Wall cracks, building footpath as per CSIRO BTF18 16Jan 23, 2022 4:08 pm SaveH2O lukazi The engineer asked me to take pictures of the cracks every 3 months, with the ruler over them, and in 12-24 months send those photos to him for an assessment. Do you think I should find a different engineer and start from the scratch (considering this one didn't know the basic thing such as which standard to apply)? That advice is spot on. Retain him. lukazi I also asked the engineer if I can just monitor the cracks over the next 12 months (without building the footpath) and if cracks are not getting bigger, don't even worry about building the footpath. He said how this would be ok. Do you think this is acceptable (don't build footpath at this stage but just monitor)? He has most probably considered the house age, the probable soil classification, last year being a wet year and this now being summer when giving that advice but I would think that given there is evidence of past movement, protecting the slab is something that is better done late than never. Just bear in mind that I am not a structural engineer but there are other forum members who are and hopefully some will also contribute to the thread. lukazi I'm not sure about the slope. I live in WA. Is there a way to check this online? Do you have anyone in Melbourne to manage this for you? How will you measure and monitor if you live in Perth? With the house lights on in the sevcond photo, I take it that it is a RE photo and you have recently bought the property. If so and if it is also vacant, just be aware about clauses in some insurance policies when a house has been vacant for longer than 3 months. lukazi IThe engineer didn't take soil samples. Would the course of action be different for a different soil type? I think he said how the whole of Melbourne is sitting on reactive clay. The Melbourne western suburbs where the house is are known as being reactive to highly reactive soil areas. I personally would do something pre winter and it appears that the engineer didn't say not to. Thanks so much! I bought the house in 2017 and it has been managed by a property manager. I have asked the PM to take the pictures of the cracks but this is somehow very difficult for them to do. structuralBIMGuy your input would be much appreciated. Re: Wall cracks, building footpath as per CSIRO BTF18 17Jan 25, 2022 8:31 pm You need a geotechnical engineer to see what is happening with the soil. Find an engineering company that will take soil samples and do lab testing. Re: Wall cracks, building footpath as per CSIRO BTF18 18Jan 28, 2022 9:16 pm Hey guys, please see the RHS of my property. What would be the cheapest drainage solution after the concrete footpath is built? Does it look like the drainage is necessary or would the sloped concrete footpath suffice? In the second picture my house is on the left with comments from the plumber who. SaveH2O and insider your thoughts would be appreciated! [img:21e3k4a2]https://forum.homeone.com.au/u/104617_1643370813.jpg[/img:21e3k4a2] [img:21e3k4a2]https://forum.homeone.com.au/u/104617_1643370834.jpg[/img:21e3k4a2] Re: Wall cracks, building footpath as per CSIRO BTF18 20Jan 28, 2022 11:00 pm [quote="groundzero":3rew3hsx][img:3rew3hsx]https://forum.homeone.com.au/u/104238_1643370847.png[/img:3rew3hsx] Write reply...[/quote:3rew3hsx] Would just the concrete suffice, without agi pipe? At this point holding this property may not be viable and I may need to sell. Investing 20k (including footpath, agi pipes, fixing roof plumbing, floor releveling). Hi all I am looking to run a water line under my concrete footpath which is directly next to my home, was seeing if this is possible without cutting the entire section… 0 20475 It sounds like you have a crack in your garage where the wall meets the ceiling, along the shadow line on the… 0 17328 Do I need to concern about this pattern of crack? Is this crack showing some signs of bigger problems? Thanks for any suggestions! 1 2044 |