A few comments:
1 - don’t we have qualifications and registration for builders now so they can’t fold a company, walk away and restart again as easily, which wasn’t the case during peak leaky building? Do you think this will have an effect?
No, the Licensed Builder scheme doesn’t prevent people closing one company and starting another. A LBP can be fined and even have their license removed for not meeting the standards set by the board but changing their company isn’t one of them. They can also just leave their company and, while unlicensed, go and work for another builder who “supervisors” their mistakes, sorry, work.
2 - most houses are designed by architects/ designers with the builders just using what’s the highly qualified architect/ designer specifies. The leaky building issues were mainly due to monolithic cladding, lack of eaves, untreated timber, etc (all designer specified - not builders). Councils were involved then and it still happened. I kind of feel it was all systemic and nothing could have been done to averted it as experienced, knowledgeable, independent and highly qualified people oversaw it all happen. A sharp industry wide learning curve. With these issues now known, are we building better? Are engineers, architects and a lot more highly qualified builders enough safeguards?
While it’s still possible now to change materials, if the designer is prepared to endorse the change, back then it was common place. We’d specify Harditex Premier but the builder would find Etherpan was on sale and swap to that.
No matter how many times I’d show where control joints in claddings were supposed to be, either the client would think they were ugly (especially when no other houses in the street had them) or the builder just couldn’t be bothered putting them in. Auckland can have four seasons in one day. You have a hot day and then there’s a thunder storm. The paint, plaster, mesh, cement board and timber frame all have different thermal co-efficients so they’ve heated up but when that rain hits them, everything cools at a different rate and when one moves to much faster or slower than another component of the cladding/wall, cracks will occur if not controlled properly.
In most plaster finished houses with plaster over a cement board, the only thing that’s stopping water entering, is the paint which should be repainted every.8-10 years to maintain watertightness which is then a maintenance issue, not a construction issue. That’s why manufacturers insist they be repainted and why watertightness claims can only go back 10 years.
I’ve always shown that a pergola should be supported at the wall on a ribbon plate with a flashing over it. But, how many times have you seen pergola rafters disappearing under a cladding and into a wall without even saddle flashings over them.
Where a roof is sloping down beside a wall, there is supposed to be a diverter flashing behind the cladding at the gutter. I’ve seen the owner of a house next to ours cutting them out. When I said they needed to be there for waterproofing, he just insisted on removing them because “they were ugly”. Three years latter, he was recladding the house.
Untreated timber was brought in because the National government in the Nineties only listened to the timber industry who didn’t like the cost and the Greens were concerned about CCA timber treatment…. the “A” being arsenic. They were concerned that people could be exposed to it (unlikely because it became inert when combined with the other chemicals) and waste material contaminating waterways.
Now, we’re required to provide details for every roof and wall cladding when, back then, we would only be required to provide sections through the building. Leaky homes was also brought about because builders didn’t know what they were doing but Seymour thinks insuring them would make them competent? Without plans needing to be checked, unless the insurer insisted on it, designers will go back to producing lightweight documents as they’d only need to spend 1/4 of the time producing drawings to the standard before the building act.
And yes, some designers were definitely stupid with their designs…. NZ is a sub-tropical country with a high rainfall…. it’s not suited to certain architectural styles or relying on sealants over mechanical flashings.
3 - I feel with less compliance, and less double and sometimes triple checking, I could see house build costs dropping maybe 20%? With those sort of savings and a more highly skilled and knowledgeable workforce, a small amount of shoddy work is more than compensated by overall costs savings, benefits to first home buyers, reduction in homelessness and all the social issues driven from lower property ownership.
The problem isn’t with the cost of inspection but in the time spent processing applications. Even with in a group of Building Officers from the same council, they disagree on what’s required. Since most councils now only accept applications electronically these days, I’d prefer an extended MBIE to process all applications centrally (or at least based in the four main centres) and council’s still handle inspections locally.
Our double gold plating of housing is costing to much in negative social issues.
BTW, I always specified treated timber even when it wasn’t required. I’ve had two leaky buildings over the last 35 years plus of producing documentation. One, the builder left out the flashings over the windows.
The second, the Builder illegally changed from the detailed and specified product to an inferior one. He also put overflows to solid balustrades above the floor level, fell decks away from sumps, and, in one place, didn’t even provide the downpipe within a column for the deck sump. That project was overseen by a private building inspector who lost his license over that project. Last I heard, he was a head compliance officer in Auckland Council’s watertightness department…. heaven help anyone’s project he’s consenting or inspecting. The builder changed the name of his company in order to avoid paying too repair the project or contribute to the repairs.