just lay the radiant reflector on ceiling there i think at least save 50% of material.

and this is just radiant reflector, your rain noise will still be there unless you add insulation layer.

The catalogue I shared has a Melaka address (supposedly comes from there I guess?)

my house 2nd floor got a room full of glass

though facing south but the side there expose to sun making the room hot though tinted

so recently i renovate the room, to put woods panel cover the window i install the foil with bubble wrap triple layer becasue 1 roll was really alot using double side sticker



RESULT

on the hottest day during noon , the room wasnt hot at all
amazing cheap solution

Bro PM links, boleh?

My guess. Before installation, temperature likely around 32c ish

After installation,.around 27ish

My 40 years old years house already comes with this thermal barrier, yup it do block direct radiant heat from the rooft shingles.

Now in some area, the barrier already crumbling down, no barrier left and I can feel the radiant heat heating up my ceiling.

This will save some cost but wont be as effective to shield the heat. Shielding below the roof tile will stop the radiation from heating the air in the roof thus reducing the heat transfer in both radiation and conduction. If you shield only the ceiling, the heat from the roof tiles will heat up the air in the roof area and trap the heat become like greenhouse.

wait so, what the difference with heat insulation?

The roof heat insulation membrane no need bomba cert wan, only the plaster ceiling board need to be class 0, can check your state ubbl uniform building by laws

okay, will check it out.
Thanks!

what if you paint your outer rooftop with glossy white .. gonna be cooler I bet....

that look like a ventilated roof, the temperature won't get that high. the main heat flux will still be the radiant from hot roof tiles.

Basically fiberglass wool with aluminium sheet. Warehouse uses these. It's very effective.

This method has been established in building sciences. Even the cheapest material would reduce the heat somewhat. So definitely not placebo.

Parking for future reference. Macam yes

Someone posted this last month.
You dupe?

https://forum.lowyat.net/index.php?showtopic=5384462

This post has been edited by Skylinestar: Jul 3 2023, 01:55 PM

somehow.. I Agree more on this, instead put shield btm of the roof that has been exposed thru the bright sun for 8 hours or more daily... better make good of the outer layer which in my opinion will give a higher impact on the reduction temp

Not going to work for an imobile object that will get the sun’s ray for the whole day.

Yes white do reflect more energy/heat, but over time, they will still be as hot as any other colour, plus the radient heat from the object itself (tiles/bricks) will still be the contributing factor of the building’s inner heat. Well duh, they’re the only source since light don’t penetrate bricks.

Ie. Car tint’s, no matter what fuck 99.99% of full black tint you use, your windshield’s radient heat by itself will act as a huge heater in your whole car. It dosen’t matter those sohai UV test at shop u see that shine through and you no feel, matter of fact is, glass itself becomes hot, and heat radiates from it - acting as a huge heater in the afternoon.

House r value before and after Install radiant barrier?

When sell house, people emphasize no kena setting sun and not hot a lot more than you think.

If buy for investment, you want sell back also need to convince buyer right?