While doing the revamp works at this two stories BH, about 20 feet X 60 feet, I realized that I tend to get wet with my sweat within minutes on the top floor while the ground floor was like there was an air condition unit.
In the beginning I thought the heat must be coming from the walls. When touching the four walls the heat was not that high.
I begin to wonder what was I missing.
The roof, oh yes I suspected the roof.
The construction looks as if the roof was laid with a layer of cement. I was wrong.
"Pak Harry, can you come and have a look at the roof area." one of my worker called me to view the opening when he was opening up the top entrance areas.
I climb up and I was very disappointed.
The top most most layer were made of those zinc sheet without and foam cladding.
The supporting frames were made of aluminium channels.
The roof was actually made of wood laid with ceiling boards, about 2 mm thick.
Above it was a layer of aluminium sheet with some rock wool encapsulated.
The way these sheet were laid was a disgraced.
There was no outlet/inlet for fresh air to enter the roof gap.
The hot air, about 55*C at peak hours, trapped in between were seeping down to the nesting room.
Now I know where those heat on the top floor were coming from.
I was speechless and shook my head on a possible disaster.
I took some pictures and presented them to the BH owner.
"Mr O, I think you need to install some gadget to suck the hot air out. Or else they will be polluting your top floor nesting room. Try to arrange for those roof air turbine. Make sure a proper installation works is done and try to prevent any water leaking."
It was not in my scope of work so I decided to push the matter to the owner.
My advise to all those who owned or going to be a BH owner soon, please check what the heck your consultant is doing with the roof system.
Make sure the hot air trapped in between the roof and the ceiling are allowed to be move out freely.
"In the mean while I will only focus to pull those birds to move to the ground floor". I told the owner.
My suggestion is to use those zinc sheet with foam cladding type.
Have a good look at these pictures taken.