Friday, March 26, 2010

Our roof insulation is the absolute!

In Home Made, the asphalt shingle made in North America is usually used.

This roofing material is comprised of asphalt and glass fiber. So, it is light and highly flexible.

And the color of the surface is taken out by a grain of a natural stone and there is no color fade. It's different from Japanese painted roof material.

It is guaranteed for 30 years, though Japanese one should be painted after 10 years.

This roof material is soft, therefore, it was difficult to install some outside ventilation system in the roof up to now.

We are settled by high-density polypropylene which is twined like a net on the roof wrap sheet (shown it as white sheet in photo).

When you use an attic as a room, it will block heat from a roof off. And we install cellulose fiber insulation in the rafter. So, we achieve the double heat insulation system on the roof.

Air (humidity) goes through the roof wrap sheet, but water isn't let through it.

Even if interior humidity is passing through roofing plywood, we become able to release humidity at the space made by the polypropylene net for ventilation.

The other house builders install asphalt roofing sheet directly on the roof plywood as waterproof sheet. So, dew condensation is caused between the waterproof sheet and the roof plywood. And they cannot resolve the problem that water degrades plywood.

Of course, We, Home Made, use the cellulose which has function of absorption and desorption of moisture in a roof. And I also get the inside ventilation system to release humidity from a ventilation layer inside the roof.
Even if this outside ventilation system isn't adopted, roofing plywood isn't degraded.

Therefore to save the budget at the house building, I think it isn't even necessary to install the outside ventilation system, if you do not use an attic area.

Dulability depends on as natural providence and high quality in building technology.

You also know that a low-cost isn't compatible with high quality of course, right?


  1. That was very remarkable. Rehabilitating the house is a must when it turns out to be a little damaged. Thanks for the suggestions given in your post, they will be of great help.

  2. Nice blog of Roof Insulation.
    A good ventilation system for your roof will have an air intake hose along with an exhaust hose. This system works to provide adequate ventilation of air both within the roof and under it.

    Proper roof ventilation doesn't consist of either an intake or an exhaust, proper roof ventilation should comprise of both of these important elements in order to create effect air circulation in and out of your home.


  3. Great and nice blog.I am new in this blog,thanks for sharing this post.

    Roofing oklahoma city

  4. All roofing materials have pros and cons. Hence, it all boils down to prioritizing what you need the most. This is also why homeowners need to weigh their options carefully to be able to choose the right type of roofing material for their home. Factors that might affect or determine this include the home’s exterior design, the prevailing weather conditions in his/her area, the cost of installing and maintaining the roof material, and the years the roof can last up to.