Insulation

     Our preliminary concerns were: insulation, energy, and layout.  We spent a lot of time comparing the benefits and drawbacks of Cellulose Fiber (the costlier option), Fiberglass and Rockwool.  Insulation needs have to be examined according to local climatic conditions, and it's helpful to know that it's not really the amount of insulation but rather the R-value of insulation (a rating used to measure the insulation's ability to resist heat flow) that is determinant of effectiveness.

      From what we gather, in Japan,  the average insulation cost for the entire house is 200,00 - 300,000 yen using either Rockwool, Fiberglass or Mixed Styrene Foam.  Cellulose Fiber runs the bill up an extra 300,000, minimum.  As far as we know, the preferences are as follows in Japan:

- Rockwool: 40% of people chose this.

- Glass Wool:  20 % of people chose this; popular in Canada.

- Mixed Styrene Foam: 20% of people chose this. Worst option, but cheap; used mainly for Tateuri-ready-made houses.

- Cellulose fiber: 20% of people chose this; comes from Canada. Friendlier to the environment but not economical.

      Anyway, we ended up  learning way more than we wanted about insulation, and became slightly confused and frustrated at our inability to make a choice.  We finally decided to trust our architect, who obviously has more experience and knowledge than us on this issue, and opted for Rockwool instead of our earlier preference Cellulose Fiber.  The savings will go toward the installation of a Radiant Floor-Heating System...

You have to see it to believe it!

   With proper insulation, double insulated walls (as per JIO regulations), good ventilation, and quality windows, we hope to be well shielded from climate rigors, humidity, and bugs... all of which are a problem at our current place.  Just take a look for yourself.  Our daughter's room has been the most affected by mold caused by water dripping from the wall and ceiling.  Her windows are so wet we place a bath towel to reduce the damage. The towel is completely drenched by the second day. 



A very sorry state of affairs.



 Despite repeated attempts to get this room cleaned and protected, the damage continues.  This second photo was taken about one month after we were forced to move everything out of that room into the living room for two weeks for supposed repairs.  No improvement whatsoever.  Luckily, this is the last winter we will have to spend here...