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  1. #1
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    Insulating Concrete walls

    Not sure if this item has come up yet.

    I would like to place insulation on the interior concrete walls in our house, and with the lack of information in thailand .
    I was considering placing 10mm wood strips from top to bottom at 16 inces apart and then placing 10mm M-PE insulation inside of the wood strips, and then
    cover this with gypsum board.
    I would like to know if this is the standered method, or is there a better insulation material or a better way of insulating a concrete wall.
    anyone done this yet?

  2. #2
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    Why insulate ? Against what, noise, damp, heat ?

  3. #3
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    Quote Originally Posted by Ivor Biggun View Post
    Why insulate ? Against what, noise, damp, heat ?
    Heat. The thai style brick and stucco walls don't wave much of an
    R-value.

  4. #4
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    You need to have spaced walling. Panelling with a minimum 75 mm gap would be my recommendation. I'm open to correction. In fact spaced walling will do all, sound, damp, heat. Make sure you put air bricks in at the top to allow for heat to exit, heat rises cold stays low.

  5. #5
    Have you got any cheese Thetyim's Avatar
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    The void between the concrete and the gypsum will never be completely filled by the M-PE.
    It will be a haven for insects, cockroaches and mice.

  6. #6
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    Quote Originally Posted by Ivor Biggun View Post
    You need to have spaced walling. Panelling with a minimum 75 mm gap would be my recommendation. I'm open to correction. In fact spaced walling will do all, sound, damp, heat. Make sure you put air bricks in at the top to allow for heat to exit, heat rises cold stays low.
    I have thought of spaced walling, and with or without air bricks would you still not get convetion type heating thru the open space?

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    Quote Originally Posted by Thetyim
    It will be a haven for insects, cockroaches and mice.
    You put Mosquito mesh on any ventilation points.

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    Quote Originally Posted by everglaze
    I have thought of spaced walling, and with or without air bricks would you still not get convetion type heating thru the open space?
    You put air bricks in top and bottom it'll self circulate because the heat rising to the top draws cooler air in from the bottom. Obviously the air brick goes on the outside of the building

  9. #9
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    Quote Originally Posted by Ivor Biggun View Post
    Quote Originally Posted by Thetyim
    It will be a haven for insects, cockroaches and mice.
    You put Mosquito mess on any ventilation pionts.
    Cockroaches will eat the Mosquitos, the mice will eat the cockroaches,
    and what do you do with the mice?

  10. #10
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    Quote Originally Posted by everglaze
    and what do you do with the mice?
    get a cat but the cat...... get a fucking dog

  11. #11
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    Thanks for all that fine advice, I shall get started right away.

  12. #12
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    Quote Originally Posted by everglaze
    Thanks for all that fine advice, I shall get started right away.
    Get a second opinion.

  13. #13
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    TD is the second opinion, and it's way better then the first.

  14. #14
    Thailand Expat Texpat's Avatar
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    I have a friend who double-walled his southern exposed wall. Not sure of the bricks and spacing used.

    He claims it only makes the house retain the heat later into the evening.

    He wishes he hadn't done it.

  15. #15
    Mid
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    Quote Originally Posted by everglaze View Post
    Quote Originally Posted by Ivor Biggun View Post
    Quote Originally Posted by Thetyim
    It will be a haven for insects, cockroaches and mice.
    You put Mosquito mess on any ventilation pionts.
    Cockroaches will eat the Mosquitos, the mice will eat the cockroaches,
    and what do you do with the mice?

    King Cobra
    by: Christopher Jackson


    k12.nf.ca

  16. #16
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    Quote Originally Posted by Texpat
    He claims it only makes the house retain the heat later into the evening.
    Badly set up insulation, the space needs air circulation to stop the inner wall heating up, no circulation then yeah it takes longer for the heat to get through, and also longer for the heat to go away.

  17. #17
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    Air Circulation can be achieved by having external air bricks top and bottom.

    If I were doing this modification, I would first install air bricks (with double mosquito netting about 20cm above the external ground and 20 cms below the ceiling. These should be placed every 2 meters along the wall that is exposed to the sun. I'd then place reflective foil on the wall held in place by vertical battons (2cm deep). Follow that with Gypsum board.

    If you have a single story house you could miss the top layer of air bricks by extend the gypsum board into the roof space, fit an airvent in the roof space walls (or ventilation tiles) and let the natural convection created by the hot air under your roof move the air behind your gypsum wall.

  18. #18
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    And then there is the Green Solution....

    Fix a wooden lattice to your external wall (the wall facing the sun's heat). The lattice should run from ground to just below the eaves of the house.

    Now plant a climbing plant at 1 meter intervals along the bottom of the lattice.

    Choose something with at thick foliage - Grape would be ideal, but there are many local Thai climbing plants.

    This is quite an efficient solution, low cost materials, environmentally friendly and effective.

    You get two cooling effects in one - Shade behind the foliage and the cooling that comes from the evaporation of water from the leaves.

  19. #19
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    Quote Originally Posted by Mid View Post
    Quote Originally Posted by everglaze View Post
    Quote Originally Posted by Ivor Biggun View Post
    Quote Originally Posted by Thetyim
    It will be a haven for insects, cockroaches and mice.
    You put Mosquito mess on any ventilation pionts.
    Cockroaches will eat the Mosquitos, the mice will eat the cockroaches,
    and what do you do with the mice?

    King Cobra
    by: Christopher Jackson


    k12.nf.ca
    Thanks for that fine advice Mid. I was afraid some one was going to throw an elephant in the mix.

    On second thought the cobra and the lattice fence go together.
    With the lattice the cobra can get in and out of the house with no problem.

  20. #20
    ding ding ding
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    The brick walls you have are the same as living in an oven. they heat up during the sunlight hours and then cook you at night.

    I would completey knock out any south or west facing walls completely and have the walls rebuilt with q-con blocks.

  21. #21
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    Quote Originally Posted by Spin View Post
    The brick walls you have are the same as living in an oven. they heat up during the sunlight hours and then cook you at night.

    I would completey knock out any south or west facing walls completely and have the walls rebuilt with q-con blocks.
    I was going to use the Q-con blocks on another project where i am going to relocate 2 walls and build in the carport for another room on the down stairs.

    on the up stairs I would have to knock out 53 sq m of wall and reset 8 windows and 1 door useing the Q-con. and from the Q-con web site
    they claim Insulating ability ("R" value, 150 mm blocks 1.15 )
    I was kinda looking for about R-5 or more.

  22. #22
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    as Itchy said, shade the outside wall with plants, that is the cheapest and best way

  23. #23
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    Another product I was looking at is called extruded polystyrene sheets (XPS),Applied to masonry or concrete interior walls, XPS insulation can be used with furring systems or other attachment methods to provide energy efficiency. Because XPS is rigid and dimensionally stable, it does not “settle”. and has an R value of 1" = 5 - 6.5

    I would be surprised to find such a thing being made in thailand.

  24. #24
    Thailand Expat Texpat's Avatar
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    Hire a bevy of topless lithe thai lasses to fan your southern exposure.

    Thats what I do. Assure you maintain an arched back.

  25. #25
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    ^ looking at your ars Texpat on your avetar are you for hire?.

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