Hi all,

I want to install heat insulator and zinc sheet on the roof for security purpose.
I was quoted as below:

"The length of your house should be 50 feet because the standard set back is 20 feet.
I presumed the length of your 1st floor is about 47 feet.
Ceiling area is approximately 940FS
Therefore, roof area is 20'x51'x1.12 (extra 4 feet for roof eave and extra 12% for gradient length) = 1140FS
The thermal insulation (cellulose) system is RM3,208.00 and roof security system (using zinc sheet only) is RM3,734.00"

That would be RM2.81psf for the cellulose insulation and RM3.28psf for zinc sheet.
Would it be expensive?
Currently I was also offered RM2.60psf for rockwool insulation.

Would appreciate any feedback from you all on the:
1. pros & cons of rockwool vs cellulose,
2. the pricing on zinc sheet. <-- does it have different grade?

Not yet install. But from my survey and feedback, it is quite effective to install them on the roof.
Pricewise, I'm comparing them. Price will definitely go up year by year. Rockwool was RM 2.60 psf on 2008, RM 2.80 psf on 2009, and next year...you decide.

As for cellulose insulator, not sure it is better as in long term and value for money than rockwool.
Cellulose is made from papers and chemical.
Rockwool is spun from melted rock.
Both of them are fire-retardent, which is good for prevent fire spreadout on your roof.

Any cellulose user here?

If the new hse is ady with insulator sheet,is there any other thing that we could do to cool the hse? Is there special paint that can be painted on the roofing to reduce heat further plus prevent roof leak?