The construction of my new house..

[Bluecat]

Foam spray insulation under the tiles reduces my house temp by 3-4 degrees compared to every other house in our Soi

Are you sure?
I can understand isolating the roof in a cold climate in order to stop the warm air from going out.
But in a hot climate, you would want it to go out as fast as you can and try to limit how much of it comes in by isolating walls and windows.
Or reducing the size of the windows.
A gentle reminder:
Hot air goes up.
Cold air goes down.

[ChiangMai noon]

Not sure what the roof design looks like but make sure you account for wasted tiles from cutting or breakage when you buy.

fortunately the building materials supplier is only 4 kilometres from our house.

it has been easy to pop back and forth so far.

[Norton]

fortunately the building materials supplier is only 4 kilometres from our house. it has been easy to pop back and forth so far.

Perfect. Better to under buy then if you need a few more just skip down and buy em. The house is starting to look up so bet you're looking forward to the big move.

But in a hot climate, you would want it to go out as fast as you can and try to limit how much of it comes in by isolating walls and windows.

A good point here. A well ventilated attic worked best for me.

[ChiangMai noon]

^
honestly can't wait Norton.

can't wait to get out of my present village, nice as it all looks externally.

Have pretty much decided to keep the house and rent it out rather than selling it even though I could do with the money, not sure if it's the best thing to do or not.

[Norton]

Have pretty much decided to keep the house and rent it out rather than selling it even though I could do with the money, not sure if it's the best thing to do or not.

Always a tough call. Renting a house out can bring in needed cash but can sure be a pain in the butt if the renters are wankers (destructive, non payers).

[ChiangMai noon]

Always a tough call. Renting a house out can bring in needed cash but can sure be a pain in the butt if the renters are wankers

it's more what will happen to property prices in the future.

I'd like to thing prices will take a big bump at some point but there are just too many new developments and too much spare land in Chiang mai to hope for much of one.

[Bluecat]

[quote=Norton;505424]

A good point here. A well ventilated attic worked best for me.

Indeed, as it would for most in Thailand.

[Norton]

^^Would also recommend solar reflective material under the roof tiles. Not that expensive and does a good job of reflecting heat. Homemart sells it under the name Coolroof.

[ChiangMai noon]

thanks.

I think there is a very old thread lurking here somewhere about insulated roofs in Thailand.

might try to drag it back up.

[Bluecat]

^^Would also recommend solar reflective material under the roof tiles. Not that expensive and does a good job of reflecting heat. Homemart sells it under the name Coolroof.

Well, why would you want to reflect heat that will not go down to where you live anyway?
Buy solar panels instead.

[Norton]

Well, why would you want to reflect heat that will not go down to where you live anyway? Buy solar panels instead.

Less heat in the attic, less to vent out. Some heat will go down if the attic gets too hot.

Solar panels are still pricey. Good idea if one can afford them though.

[ChiangMai noon]

Solar panels are still pricey.

that's me out.

have to say it's pretty fukking cold up at the new place mornings and evenings for about 5 months of the year.

[AntRobertson]

Solar panels are still pricey

They are. We were quoted 200k for an array so small it really would've only made a neglible difference.

[Bluecat]

Some heat will go down if the attic gets too hot.

Indeed, what it will get if the roof is isolated.
Not really going down, it can't go down if hotter that the air on the lower levels but it will heat up the lower levels by contact.
So try to remove that hot air as fast as you can. Chimneys would help.

[Norton]

But in a hot climate, you would want it to go out as fast as you can and try to limit how much of it comes in by isolating walls and windows.

A good point here. A well ventilated attic worked best for me.

So try to remove that hot air as fast as you can. Chimneys would help.

Errr... yes!

[Art Vandelay]

^
the front doors will be sliding ones so they will neither open inwards nor outwards.

the others will be innies.

For whatever reason, Thais seem to like to have the doors open out. The bungalow my wife had built has both the front and back doors opening out. Make sure you're around when they install them if you want them to open in.

[Art Vandelay]

Some heat will go down if the attic gets too hot.

Indeed, what it will get if the roof is isolated.
Not really going down, it can't go down if hotter that the air on the lower levels but it will heat up the lower levels by contact.
So try to remove that hot air as fast as you can. Chimneys would help.

I don't know exactly what type of insolation (not isolation) was used under the roof of our bungalow, but whatever it is it definitely is keeping heat from the roof from coming into contact with the air in the bungalow. I'll try to get my wife to explain what was used and where it was installed - immediately under the roof tiles, immediately above the inside ceiling, or both. I don't know if it makes a difference but we use an airconditioner most of the time we are there.

[Loombucket]

Looks like you have the makings of a nice little place there CMN. I like the views from your 'office'. Are you planning an upstairs verandah or just a large shady area downstairs?

[dirtydog]

Outward opening doors are more secure.

The roof tiles get really hot during the day, without insulation this transfers downwards and will heat up the ceiling which in turn will heat up the rooms, you need the roof area to be as well ventilated as possible to get rid of heat, and also insulation will slow down the transfer of heat.

[ChiangMai noon]

What type of chimneys are we talking about here?

I haven't seen a lot of chimneys on thai houses.

[Norton]

What type of chimneys are we talking about here?

Not really a Santa Claus chimney in the sense you are thinking. Many varieties of roof ventilators available ranging from simple piping to turbine wind driven fan types. All types are available locally. I'm sure the place you are buying roof tiles has some.

[Jet Gorgon]

^
they are saying before songkraan, yes.
the kitchen area is quite small, but big enough for cooking.

not sure what to do with it yet.

Big kitchen is best, IMO. With an island where friends can gather while you prepare the takeout on plates. Nice going Noonies and best of luck. Did you tear down the old house?

[Ban Saray]

[quote=Bluecat;505451]

A good point here. A well ventilated attic worked best for me.

Indeed, as it would for most in Thailand.

I never said it was not ventilated, but the fact remains and is undisputable, my house is cooler than all others in our soi, they were all built by the same builder with the same materilas.
All our neighbours have mentioned the fact.
Another offshoot was that as the roof frames and walls moved or flexed in the heat many other roofs in the soi had craked tiles after a year or so, non of my tiles have cracked yet after 5 years.

[oldgit]

Any latest photos on the progress of your new house CMN? please!

[ChiangMai noon]

Any latest photos on the progress of your new house CMN? please!

I'll put some up this evening Mr Git.