Thread: roof insulation?

The fans probably did as much as the insulation, that's good idea. I just can't see something that thick or the roof spaying being as good as 6 inches of R 27.

I thought the same thing Df so when I bought the stuff I just did the area above the main bedroom to start with and you could notice the difference as soon as you walked in there, so I did the whole roof area as well. But you are probably right about the fans, they probably made more of a difference. I noticed when you turned the fans off on a hot day it only took an hour or so and the temperature rose noticeably.
To be honest if the fans were continually replacing that air in the roof cavity and not allowing it to heat up the insulation is probably not even needed, because all the foam does is stop that hot air radiating down into the living area.
The house I built in Australia had a high pitched roof with half the house open, without ceilings and the rest of the house had a loft area above the kitchen/bathroom.
I installed a exhaust fan up the top of the gable end which blew the air out and had louvre windows at the other end which were left open allowing fresh air to be brought in. People used to walk in there on a hot day and think there was an air con running.

Originally Posted by DrAndy

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'm going with 6" sunshield (currently 329 for 0.6 by 4 metres).
First Homepro visit they said 'no have - no stock... better go with plastic'. Showing me the impressive R values on 6 millimetre foam rolls. The cost would be around 18,000.

Second visit to Bangplii homepro 'certainly Sir, pay 1000 deposit'. After 3 days the guy came to measure... cost will be around 9000 baht. I can't see hot air blasting it's way through this stuff - the fibreglass is protected by a foil bag.

I'll reserve my opinions of foam - I think it might be more suited to putting a layer on a 'hot' wall behind a layer of plasterboard for aircon rooms. (not sure about pricing - you can buy foam backed plasterboard too).

One assistant actually told me that my aircon would suck heat in from outside because I installed it on the hot sun-facing wall at the back of the house!!!!

In 2 years, after the 'control' phase of the moobahn is lifted, I'll be elevating the roof panel for our extended kitchen up to the second floor. Gotta keep the sun off!

Quote 'Over the past few weeks, there has been an intensive media campaign against the insulation program that has led to four young installation workers being killed by electrocution or heat stroke, at least 87 roof fires and 1,000 homes being declared electrically “live”.'

https://www.wsws.org/en/articles/2010/02/insu-f22.html


and this was with Aussi wiring! Think what Thai electrics could achieve.

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.

Nothing wrong with the foil mate. Lay it directly under the tiles. This is better as it leaves your ceiling clear of any clobber and you will not be hiding any wireing.

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.

yes your post is old, but someone will be reading it 'up to date'

Originally Posted by Pragmatic

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

That is incorrect. I had a house insulated in Queensland with this method and found it 100% . The house was never hot again. Some use paper pulp and some use a wool blend. It can be blown down into wall cavities as well. I recommend it from experience.

Originally Posted by thaimeme

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....

If building a new roof, lay foil insulation on roof battens before tiles, but make sure that it is rolled out "Top to Bottom" and not across, because if there is any leak in tiles , water will run down to eaves, and not drain into ceiling cavity. Not so long ago i saw some Thai roof layers doing this across, probably because its easier. Told the boss who agreed and made them change it .

Originally Posted by Pragmatic

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.

Don't think that you really have any idea, just guessing, so not worth listening to. People want information that is correct, preferably from others previous experience.

Originally Posted by Dragonfly94

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

Well worth looking into. Sounds very convenient to get the inside roof sprayed before the ceiling goes in.

Originally Posted by crippen

Quote 'Over the past few weeks, there has been an intensive media campaign against the insulation program that has led to four young installation workers being killed by electrocution or heat stroke, at least 87 roof fires and 1,000 homes being declared electrically “live”.'

https://www.wsws.org/en/articles/2010/02/insu-f22.html


and this was with Aussi wiring! Think what Thai electrics could achieve.

You obviously do not understand. Let me assure you that driving screws through electrical wiring is not a very good idea. Shonky insulation contractors were employing untrained young lads to do this work, no wonder it was a dangerous project.

Originally Posted by Happy Dave

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.

Nothing wrong with the foil mate. Lay it directly under the tiles. This is better as it leaves your ceiling clear of any clobber and you will not be hiding any wireing.

The "yellow peril" and the "foil" serve very different purposes.

The former stops convected heat and is most used (in Thailand) to keep cold (usually a/c'd) air in.

The latter stops radiant heat and is most used to keep hot air out.

The choice (one or both) should depend on what you want to do or what you can fit, not on keeping your ceiling clear.