walking through a hospital today and there's a corridor in the hospital (only a few years old) with buckets and towels out because it's raining.
Same with just about every bunnings everytime it rains. It seems to be large roofs are heaps harder to seal than house roofs?
How hard can it be FFS. Theres all these super well designed and engineered buildings but they cant seal the roof? Makes you wonder how reliable the other parts of the engineering in the structure are

Because Architects come up with weird and wonderful(?) designs without any consideration on how difficult its going to be to make water tight.

elmo said..
I may be mistooken but it may have something to do with commercial roofs being flatter than residential.

Inclined roof the water runs of quicker whereas a flat roof the water can pool more allowing it to wick through overlaps and loose screws.

That said I've just had weeks of fun tracking down a leak on my tin roof.

But then again I may be in the wrong forest rather than barking up the wrong tree.

Makes you wonder. I remember seeing all these old factories where the rooves were made up of small angled sections, like a saw tooth type of thing. Now they seem to prefer to do it in single spans, so I wonder if this was one of the design considerations, or just a limitation of materials of the time?

Box gutters, horrible things. No fall, smallest pin hole will be like Niagra. Yes and or flat roofs, not enough overlap in the joins. All sorts of things, water is a bugger, it's amazing how it can leak with no sign of where or how it's happening.

Box gutters, or un-insulated box gutters that don't leak but get condensation on them. Also lack of cleaning or poor design.

Low pitch roofs withy long runs, and every Tom Dick and Harry running around up there sevicing something

And Massive penetrations all over the place.

Add to that people that dont give fart, plus the people that have no clue but still cut holes in roof.

If you had a roof with no penetrations for vents, aircon, plumbing, elctrical, personel access, exuast fans....

You probably wouldn't have any leaks.

My rant is a reflection of my life trying to prevent exactly these problems

Macroscien said..
Possibly Kiwi made the roof.
I know that almost all new buildings in NZ suffer from leaky syndrome .
That including my own commercial that is set for demolishing and rebuild due to this leak problem;

Why would a kiwi spend four years learning a trade below the poverty line when they can skate through a defence force apprenticeship at full wage getting a very narrow breadth of experience.

Just comes down to half the population being clueless, and the other half not giving a rat's. Then again, it's probably 3/4 of the population for each with a huge overlap having both.

Its bad enough with a low pitch tiled roof on a house, let alone a comparatively massive roof. If it rains hard enough, any gaps/things that aren't quite right start to leak.