Heat Barrier Sheet II Unused 50m 1 roll + Used bonus

This is leftover material from a renovation project. I'm including one unused 50m roll and one used roll with an unknown amount remaining.
This is a great deal for anyone who needs it.
I laid it under the tatami mats shown in the photos, and it has had a very positive effect.

◆Product Description
?Product Name: Heat Shielding Breathable Waterproof Sheet (Heat Shielding Type) Heat Barrier Sheet II, Keikoku Co., Ltd.
?Product Number: HBⅡ-50
?Size: 0.2mm x 1,000mm x 50m roll
?Quantity: 1 roll
?List Price: ￥24,000/roll

◆Usage Example: I used this to combat the cold and humidity in my parents' tatami-floored rooms, where the first floor is a workshop and the second floor is living space. In winter, the cold from under the floor would transfer to the tatami, making the rooms uncomfortably cold. After learning about this product and trying it, the results were outstanding. The cold, clammy feeling of the tatami disappeared, and the room temperature became the same as the thermostat setting. In the morning, the room temperature used to be almost the same as the outside temperature, but now it stays warm. I recommend this for DIY cold-proofing projects in old wooden houses. It is also effective in improving air conditioning efficiency during the summer.

◆Installation Precautions: The correct way to install is with the printed side facing down (towards the floor). If installed incorrectly, the performance will not be fully realized (I saw an example of incorrect installation posted on social media – what a waste...). For overlapping seams of the sheet, we recommend Ace Cloth 011 Aluminum Weather Resistant Acrylic Silver (MonotaRO Order Code 37053947).