Materials have to meet a minimum standard for expected durability in the conditions. IIRC that's 15 years for roofing materials for example. If it's rooted in 20 years, you need to reroof. If you'd paid a little bit more originally, for a heavier grade of steel and better coatings etc, that roof may twice as long despite costing only maybe 20% more. False economy - but of course people flick off houses quickly - you're probably not going to recover that extra 20% you paid when you build a house, buyers don't really notice or don't care - so long as it looks okay when they buy it.
Sure, OK. So presumably if you Support Kiwibuild, then you would support the Government building those houses to the highest standard, which of course would reduce the maintenance, but likely increase the price by some unlikely insigificant amount. There are already complaints that the increases already suggested make these houses "unaffordable".
I don't see Kiwibuild helping people, just costing the tax payer huge money, with some people about the recieve a massive windfall when they resell on the open market.