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  1. #1
    Newbie Koentje's Avatar
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    Cost of Tra Chang roof construction (estimate)

    Hi all,

    I am building a house in Thailand and the next stage is the construction of the roof. I heard good stories about the Tra Chang roofing system. There is no welding, everything is done with screws and the material is rust free and so on. I am only interested in the CONSTRUCTION part of it, not the rooftiles or boards etc. I have looked on a lot of websites but it is just impossible to figure out what the cost would be for my roof.

    Maybe someone here has experience with it and can give me an estimate of the price.

    See the drawing for dimensions.

    Thanks.
    Last edited by Koentje; 23-08-2014 at 02:06 PM.

  2. #2
    Newbie Koentje's Avatar
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    I need more posts to post pictures...

  3. #3
    Newbie Koentje's Avatar
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    Thailand Expat terp80's Avatar
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    Smile

    So, Koentje, why aren't you doing your own thread now?!

  5. #5
    Newbie Koentje's Avatar
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    Quote Originally Posted by terp80 View Post
    So, Koentje, why aren't you doing your own thread now?!
    ???????

  6. #6
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    Quote Originally Posted by Koentje View Post
    That's a wigwam

  7. #7
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    Koentje, it's not going to be of much use to you other than as a comparison, but my roof was approximately 8m x 16 m with a 4 metre rise. We also had an extra 4m x 4m x 3.5 m bit sticking out at the front.

    We used Colorbond type metal sheets which only need a lightweight welded frame underneath (less welding = less chance of problems I reckoned). Cost of the roof sheets was about Baht 100k for the maximum thickness of metal sheet we could get (0.32mm or something I think???) which included 5mm of foam insulation glued on the underside. The metal for the roof frame was about Baht 45k.

    Roof frame:



    100k's worth of roofing sheets:



    Roof going on:



    Not necessarily the classiest solution, but it's worked very well for us.

  8. #8
    Newbie Koentje's Avatar
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    Thanks for the info! I have a rough idea about the cost of material now. Your roof is a little bigger than mine so mine should be somewhere around 50000 baht.



    [quote=Roobarb;2848192]Koentje, it's not going to be of much use to you other than as a comparison, but my roof was approximately 8m x 16 m with a 4 metre rise. We also had an extra 4m x 4m x 3.5 m bit sticking out at the front.

    We used Colorbond type metal sheets which only need a lightweight welded frame underneath (less welding = less chance of problems I reckoned). Cost of the roof sheets was about Baht 100k for the maximum thickness of metal sheet we could get (0.32mm or something I think???) which included 5mm of foam insulation glued on the underside. The metal for the roof frame was about Baht 45k.

  9. #9
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    It looks to me that you used the sexy white blocks on the 2nd floor but the old red bricks on the bottom?

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    Yup, but bear in mind that my place was basically knocked together by some Isaan farmers in the off-season using some metal from a local shop.

    I'm not too sure what Tra Chang is but the fact it has 'Roofing Systems' in it's name lends it an air of professionalism that my roof is lacking.

    With that extra professionalism will probably come extra cost (and quality too...).

  11. #11
    Newbie Koentje's Avatar
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    Quote Originally Posted by Roobarb View Post
    Yup, but bear in mind that my place was basically knocked together by some Isaan farmers in the off-season using some metal from a local shop.

    I'm not too sure what Tra Chang is but the fact it has 'Roofing Systems' in it's name lends it an air of professionalism that my roof is lacking.

    With that extra professionalism will probably come extra cost (and quality too...).
    Tra Chang is a brand name, I think it's also called SCG or "elephant brand". I am just looking for some examples of roofs and their prices so I will be able to know what a reasonable price is for my roof.

  12. #12
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    We need pic's.

  13. #13
    Newbie Koentje's Avatar
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    Quote Originally Posted by snakeeyes View Post
    We need pic's.
    Will make a Sketchup drawing and post that here. Working on it.

  14. #14
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    Quote Originally Posted by Kurgen View Post
    It looks to me that you used the sexy white blocks on the 2nd floor but the old red bricks on the bottom?
    Yes, my back of an envelope house design didn't list the materials to use so my wife, bless her, when asked what bricks to use, suggested the little red ones as she assumed that they were better. By the time I found out it was too late.

    It's the bathrooms on the first floor that have the sexy QCon blocks. This runs against the general advice on TD that QCon is not great for bathrooms as they tend to disintegrate when they get wet. I suspect the builder decided to use them simply as they are lighter and so easier for his boys to carry to the first floor.

    Anyway not to worry - next time around I'll get it right...

  15. #15
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    Quote Originally Posted by Koentje View Post

    Tra Chang is a brand name, I think it's also called SCG or "elephant brand". I am just looking for some examples of roofs and their prices so I will be able to know what a reasonable price is for my roof.
    That was my initial concern with using my roof cost as a guide. SCG is I think Siam Cement Group, so it's quite possible that Tra Chang Roofing Systems are simply a vehicle for flogging their concrete roofing tiles to the consumer market. If so then their roofs would be a lot heavier than my tin roof and so need a considerably beefier (and coslier) metal frame to support them.

  16. #16
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    I've held off replying, since I can't answer the question of cost. But our roof has a screwed together truss frame using galvanized steel. I'm not sure if it's "Tra Chang" brand, but PD House uses this system on all their houses.
    It seemed pretty solid when it was put together. The reason I like it that it is NOT welded together bits of metal. Besides, the galvanized coating is not compromised. If it was welded, you'd have to slather on more corrosion protection coating over the welded areas.





    Steve

  17. #17
    Newbie Koentje's Avatar
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    PD House uses a similar system called "EASY TRUSS ", see their website:

    :: PD House Build for the future:: Home Builder , Construction ,

    I like the idea of the galvanized parts being screwed as well, no burning off the protecting layer!

  18. #18
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    Quote Originally Posted by stevefarang View Post
    The reason I like it that it is NOT welded together bits of metal. Besides, the galvanized coating is not compromised. If it was welded, you'd have to slather on more corrosion protection coating over the welded areas.

    The galvanized coating has been compromised at every point a screw penetrated it, unless of course it was pre-drilled before the coating process.

  19. #19
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    Quote Originally Posted by Fondles View Post
    Quote Originally Posted by stevefarang View Post
    The reason I like it that it is NOT welded together bits of metal. Besides, the galvanized coating is not compromised. If it was welded, you'd have to slather on more corrosion protection coating over the welded areas.

    The galvanized coating has been compromised at every point a screw penetrated it, unless of course it was pre-drilled before the coating process.

    Your statement would be true if you assumed that there was no thought put into the "pre-engineered roof truss" and instead, one just forced some screws to hold together some pieces of galvanized steel laying around.

    But, you should never assume.

    Steve

  20. #20
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    You are correct Steve, One should never assume.

    On the flipside of that one should read what is posted and take note of "unless of course it was pre-drilled before the coating process".

    Then one would not have wasted their time replying.

    Saying that though even with the holes put in place during the manufacture process when the screws thread into the holes they will compromise the galvanize coating, unless of course they don't actually bite into the metal.
    Quote Originally Posted by Butterfly View Post
    let me explain simply 100MB != 1GB RAM

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    ^

    Or, you could have read the PD House link that Koentje kindly provided. It's a little rough in the English translation, but you could have figured out the gist of it I'm sure.

    Steve

  22. #22
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    must be really small nuts on them bolts then cause they look like roofing screws to me.

  23. #23
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    ^

    Q con blocks are aerated concrete blocks. Extremely light (they can float on water) and easy to shape using hand tools. The aeration also gives them some insulating value, which means you minimize the radiant heat transfer across the wall when that hot tropical sun is shining down on your walls. So the thicker they are, the better. I was impressed by our 9 cm blocks, hot on the outside, relatively cool inside.

    I don't think cut limestone blocks would be as effective and they would be much heavier.

    That's the beauty of pre-engineered trusses. They actually put some thought into the design of the trusses and the fasteners, so they don't have to be huge. I was very impressed by the strength of our truss system.

    Nothing wrong with welding (I used to be a certified nuke welder way back in my youth), but you'll mess up the galvanized coating of the steel you use. So you got to be sure to really slather on some type of rust resistant coating.

    If you do the welding and can lay a good bead, all the better. I always get nervous seeing some local guy, with flip flops and no eye protection, trying to weld pieces of metal together using a welding machine from what looks like the 1950's.

    Steve

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    ^
    Yes, truly mad.

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