Thread: roof insulation?

Having a look in Home Pro today I was surprised at the different brands. The assistant did not seem up to much and kept saying one R 27 and R 27 were the best, but there were quite a few others. One was a thin metalic one which she said was a fire hazzard and no good, mm why do they sell it then. I always suspect these assistants steer you to one in their own interests. Anyone got any recommendations, I think the R ones are made by siam cement and were 3 inches thick. A roll does 2.4 meters and about 300 baht

the fibreglass rolls with foil sandwich are probably the best way, if you have a ceiling to lay them on

the assistants don't usually have any interests but do repeat things which are not necessarily true

I will probably get around to laying some yellow peril in my loft but due to my faith in Thai wireingmanship I'll be fucked if I'll use the foiled stuff.

Originally Posted by DrAndy

the fibreglass rolls with foil sandwich

Originally Posted by Kurgen

I will probably get around to laying some yellow peril in my loft but due to my faith in Thai wireingmanship I'll be fucked if I'll use the foiled stuff.

you misunderstand, the yellow fibreglass comes with foil outside, like a sandwich

at least the type I bought did

Butters purchased his from Home Mart. Laid it himself.

https://teakdoor.com/construction-in-...ml#post1384844

Originally Posted by DrAndy

Originally Posted by DrAndy

the fibreglass rolls with foil sandwich

Originally Posted by Kurgen

I will probably get around to laying some yellow peril in my loft but due to my faith in Thai wireingmanship I'll be fucked if I'll use the foiled stuff.

you misunderstand, the yellow fibreglass comes with foil outside, like a sandwich

at least the type I bought did

I think that's what he meant. If the foilis on both sides then any exposed wiring has a good chance of shorting out on the foil.

But it's not just thailand. Oz just went through a whole spate of house fires because the govt. green insulation rebate created a whole stack of no experience insulation companies putting foil down on top of poor wiring and cheap down lights.

Originally Posted by xanax

Having a look in Home Pro today I was surprised at the different brands. The assistant did not seem up to much and kept saying one R 27 and R 27 were the best, but there were quite a few others. One was a thin metalic one which she said was a fire hazzard and no good, mm why do they sell it then. I always suspect these assistants steer you to one in their own interests. Anyone got any recommendations, I think the R ones are made by siam cement and were 3 inches thick. A roll does 2.4 meters and about 300 baht

Spend a little more and get the 6" stuff - worth the extra in it's insulating properties.

Fiberglass is the way to go, hard to go wrong. If you can buy without foil surfaces and it's cheaper, do so, since the foil contributes zero. Rice husks or balled up newspapers would work nearly as well, but are a fire hazard and my become happy habitat for creature guests you don't want.

The foil is sold with a lot of mumbo jumbo, the clerks don't understand it, even I almost don't understand it, shiny side down, black body radiation, thermal cell development and so on. You can't imagine the ways installation can go wrong, or the post installation problems that develop.

But I can tell you this for certain: if you want foil, the best way to go is to buy cheap supermarket foil and glue it to the underside of the roof, shiny side down.

Originally Posted by jack swelters

Fiberglass is the way to go, hard to go wrong. If you can buy without foil surfaces and it's cheaper, do so, since the foil contributes zero. Rice husks or balled up newspapers would work nearly as well, but are a fire hazard and my become happy habitat for creature guests you don't want.

The foil is sold with a lot of mumbo jumbo, the clerks don't understand it, even I almost don't understand it, shiny side down, black body radiation, thermal cell development and so on. You can't imagine the ways installation can go wrong, or the post installation problems that develop.

But I can tell you this for certain: if you want foil, the best way to go is to buy cheap supermarket foil and glue it to the underside of the roof, shiny side down.

Shiny side to the side that you want to retain heat. Retain heat on the outside of the surface, shiny side to that surface. Retain heat on the inside of a surface, shiny side to the inside. Attic space: Hot sun on top of the roof, shiny side up. Cold weather most of the time with the heat on inside the house, shiny side down. Same goes for walls, just in vertical fashion.

not sure about the result of insulation since inevitably it will also keep heat in if not using aircon...assume you have windows and doors for the ambient heat to enter..55

Agreed that high sun will appreciably heat up the roof but think I would investigate roof vents/extraction fans solution to whatever the heat issues are....

Think I would have used foam/foil under the tiles if I had not forgotten in the stress of building...rarely have major heat problems though and spend most time outside..good luck

Originally Posted by xanax

roof insulation?

Home Insulation Buying Guide - Home Insulation Scheme Review - CHOICE

hi I am looking for blown insulation contractors in Bangkok. Does anyone know of any. Google isn't coming up with any? Because of the roof and ceiling design I cannot install fibre glass rolls.

A waste of time. Just leave yer windows and doors open.

Originally Posted by Somelikeithot

hi I am looking for blown insulation contractors in Bangkok. Does anyone know of any. Google isn't coming up with any? Because of the roof and ceiling design I cannot install fibre glass rolls.

Create a ceiling design that doesn't require installing any insulation material, less a fucking health danger as fiberglass....

Originally Posted by Pragmatic

A waste of time. Just leave yer windows and doors open.

Lets the heat and noise in

Originally Posted by Dragonfly94

Lets the heat and noise in

As for the heat it cools the house being as there's a through draft. The noise, after 10 years I don't really notice it.

Check out this company:

CoolOrCosyThai.Com

Will not support a flame and bugs that get into it die. Hope this helps.

So that's having your roof sprayed, does not sound very convincing really. Might ask them for a price, if they've really did do the Sydney opera house though it's probably prohibitively expensive

Originally Posted by Eliminator

Check out this company:

CoolOrCosyThai.Com

Will not support a flame and bugs that get into it die. Hope this helps.

Your right EL the best way.


PU foam is not good as it can hold water.

Is the stuff these guys use PU foam? I asked them for a quote

Originally Posted by Dragonfly94

Is the stuff these guys use PU foam? I asked them for a quote

No not the same DF, the stuff that Cool&Cosy have is good.
I talk to them 6 years ago & I don't remember the exhale price, but think it was around 300b per/metre.

That's not bad then

Originally Posted by xanax

Having a look in Home Pro today I was surprised at the different brands. The assistant did not seem up to much and kept saying one R 27 and R 27 were the best, but there were quite a few others. One was a thin metalic one which she said was a fire hazzard and no good, mm why do they sell it then. I always suspect these assistants steer you to one in their own interests. Anyone got any recommendations, I think the R ones are made by siam cement and were 3 inches thick. A roll does 2.4 meters and about 300 baht

The R value is the efficiency to keep the heat out, R27 is the best I have sen in Thailand. I just insulated the roof over our patio with R27, before the insulation when the sun hit the metal roofing it turned into a radiant heater, now there is no heat transfer. The thin metallic stuff is worthless.

I insulated a roof in Chiang Rai years ago with this thin material that was like foam inside with a silver coating either side, about 10mm thick and the rolls were about 1mtr wide. Easy to use, just rolled it out and jiggled it into place. Cut easy with scissors or trimming knife. Made a heck of a difference to the temperature of the house, much cooler than before. Can't remember the price per sq mtr but it was surprisingly cheap. The best thing was how quick and easy it was to use. Bought it from HomePro I think.





The other thing I did was install two exhaust fans in the roof cavity, in the gable ends, one at either end of the house. One blowing air in and the other blowing it out.
A guy in Australia put me onto it years ago. The theory is the air is continually being replaced and does not get a chance to heat up, thus no heat radiating down through the ceiling. It does work and exhaust fans are cheap as chips to run.