Multi-layer reinforcement of window glass from the outside = External construction is the basis for energy conservation, crime prevention, and disaster prevention
, as well as soundproofing and UV protection
* Patented product, winner of the Manufacturing Idea Grand Prize
table of contents:
* Current status and energy-saving effects of existing window glass strengthening methods
* What is the disaster prevention eco window construction method?
* Characteristics and needs of the disaster prevention eco window construction method
* Q&A
* Various functions
* Insulation performance comparison
Current status of window glass strengthening methods and their energy-saving effects
Common window glass strengthening methods evaluation:
1. Film: Inexpensive, prevents glass from shattering, buys time if a suspicious person enters, but has little energy-saving effect.
②External shutters: Low wind resistance (possibility of damage due to back wind), installation on all windows increases construction costs significantly
3) Tempered glass: Expensive, has high wind resistance but may break if hit by flying debris, and has low energy-saving effects.
④ Double-layered inner windows: Low in crime prevention and disaster prevention effects, but energy-saving effects. Popularized by subsidies
What is disaster prevention eco-window construction?
This is a simple method to reinforce windows from the outside. This patented technology significantly reduces the risk of window glass breaking and at the same time increases insulation by more than twice the original level.
Metal fittings are attached to the outside of the window glass and then high-strength, highly insulating hollow polycarbonate (4mm thick) is installed.
Measures against strong winds on the coast: Iwawada Fisheries Cooperative Association Office, Onjuku Town, Chiba Prefecture
Energy saving and crime prevention measures at elderly care facilities: Kashiwa City, Chiba Prefecture
Private home example:
Features and needs of disaster prevention eco-window construction method
Features:
①It is not just about preventing scattering.
2) High cost performance = Approximately 2,000 yen per window
③ Heat reflux rate 6 ⇒ 3 (w/k・m2・sec) = reduction in utility costs
4. Improved crime prevention by preventing glass from breaking = Prevents suspicious people from entering through windows
⑤DIY construction = construction cost reduction
⑥ Suitable for installation in apartment buildings: Lightweight and removable, it is easy to obtain permission from the apartment building.
⑦Installation is usually completed within 2 days
8. Long-term durability equal to or greater than that of buildings = Polycarbonate is used as bulletproof glass and as window material for the Shinkansen
9. Flame retardant = Unlike acrylic and PVC, this material is flame retardant.
Main needs:
①For those who want to significantly reduce their utility bills.
② Energy-saving renovations for facilities that require air conditioning for long periods throughout the year: heated swimming pools, hospitals, elderly care facilities
3) Soundproofing measures for major roads, airports, and other noise-generating areas.
4. As a crime prevention measure in areas where you are concerned about suspicious people and burglars.
5) Strengthening window glass in coastal areas where strong winds occur frequently.
6. Prevents windows from breaking at golf courses, ball fields, and near volcanoes.
7. For energy-saving renovations of companies, organizations, and government agencies promoting ESG and SDGs.
8. Strengthening disaster prevention and crime prevention security at warehouses where important supplies such as medicines and food are stored.
9. For companies that were interested in energy-saving renovations and disaster prevention improvements but were hesitant due to the cost and construction time.
10. For UV protection in warehouses, etc.
⑪To reduce condensation.
Q&A : Frequently asked questions.
*What are the costs of materials and installation?
It costs about 2,000 yen for one 90cm x 90cm window pane. For a small window, it costs about 360 yen.
Installation can be done by DIY, so it won’t be a burden on busy businesses that are short on staff.
*Wouldn’t it be cheaper to stick it directly to the window without using special fittings?
The light in the room inevitably attracts insects. I think it’s important that it can be removed.
*What is the strength and durability of hollow polycarbonate sheets?
Polycarbonate is called engineering plastic and is used for aircraft windows, bulletproof glass, etc.
Metal pieces are deformed and absorbed, so it will not break. It is fine even if a car is driven over it.
Its durability is considered to be about the same as that of rain gutters. It is also flame-retardant and does not burn easily, but is not prone to damage.
*Should I attach it to the inside or outside of the window?
This method is characterized by its strong protection against typhoons, gusts of wind, and burglaries, so we recommend attaching it to the outside.
Also, external insulation is considered to be better in terms of strengthening insulation.
However, if DIY installation is difficult due to being in a high place, etc., it can also be attached to the inside.
*Is it difficult to glue the special metal fittings or cut the polycarbonate sheet?
It requires some work, so if you are not confident, it is a good idea to ask a professional.
By the way, previous users have installed it by themselves by reading the manual.
*Can I use double-sided tape for adhesion?
Double-sided tape is not water resistant and is not suitable for attaching to the outside of a window.
Bathbond (silicone clear) will hold the special metal fittings firmly for a long period of time.
Bath glue (silicone) holds 10 liter bucket in place for a week
Various functions
Impact experiment:
Metal objects of various shapes were dropped from a height of 1m to see if glass protected with polycarbonate would break.
Reduction in utility bills:
Amortized over approximately 2 years: Calculated based on a window area of 10 m2.
Insulation test:
It was measured that the insulation effect was approximately twice as good (heat return rate: 2.9w/km2.sec).
Crime prevention:
Approximately 70% of break-ins occur through windows. This also helps prevent burglaries.
Soundproofing effect:
Noise reduction effect of about 16 dB.
This is the noise level at a location about 40 m away from the main road.
Smart daylighting:
Blocks sunlight in summer and lets light in winter: In summer, sunlight from a high position is blocked by the ribbed side of the hollow polycarbonate.
On the other hand, in winter, light from a low angle is reflected by the ribbed surface and allows light to reach the back of the room.
UV protection:
Prevents discoloration of items stored in warehouses due to UV rays and reduces lighting costs by blocking light
Catalogs and video materials:
*For more detailed information, please see here⇒Japanese comprehensive information
*For overseas users, please click here⇒English manual
*Product overview and installation method overview here⇒Video explanation
Evaluation: Received
the “Monozukuri Idea Grand Prize” in recognition of Japan’s only window breakage prevention effect, and
the “Eco Company Grand Prize” for implementing energy-saving measures
In 2016, our solar heat recovery technology won the prestigious Energy Globe Award in the energy sector.
It is also registered as a gift in return for the hometown tax donation in Kashiwa City, Chiba Prefecture .
For a donation of 21,000 yen:
We accept orders for a minimum of 8 sets.
*The photo shows one set covering a 50cm x 50cm glass surface, so 4 sets are needed for a 1m x 1m window.
*If you currently have windows with double or more layers of glass, please contact us in advance. The bolt length may be changed.
Order form (for email and fax): Word form
Collaborative construction with Kyodo Kenchiku Kenkyusho
: Installed on windows of elderly welfare facility that operates 24 hours a day, day and night, for crime prevention and energy saving purposes, Kashiwa City Y Welfare Facility
Summary of features:
| Features | explanation |
| Flame retardant | Unlike acrylic, polycarbonate does not catch fire easily. |
| External ( or double-sided ) insulation | It can be retrofitted to the windows of existing buildings to provide multi-layer reinforcement. |
| Selective Daylighting | It blocks out light in the summer and lets in sunlight in the winter to brighten and warm the room. |
| Crime and disaster prevention | Hollow polycarbonate changes the common belief that “glass breaks.” |
| Sound reduction and soundproofing | It has a sound reduction effect of about 16 db . It can also be used to reduce noise from aircraft, etc., even if the house faces a main road and is about 40 meters away . |
| Air layer adjustment | You can freely choose the length of the bolt to adjust the air layer. |
| Reflection angle adjustment | The angle of solar reflection can be changed by adjusting the bolts on the top, bottom, left and right. Overhang is also possible by making the upper bolt longer than the lower one. |
| Long life | Since it is a UV- resistant roofing material, it has a lifespan almost as long as the building itself. |
| High strength | It is made of the same material as aircraft windows, Shinkansen windows, and bulletproof glass. |
| lightweight | It is lightweight at 1kg/m2, so it will not damage the window rail. In addition, the risk of injury even if it falls is extremely low. It has been adopted in many apartment buildings. |
| UV protection | Blocks ultraviolet rays so it won’t damage indoor furniture or floors . Used to prevent cartons from burning in warehouses. |
| Removable | By turning the nut, it can be easily attached and detached, and can be washed or replaced freely. There are measures to prevent theft and to make it difficult to turn. Please contact us. |
Insulation performance comparison:
High insulation, high strength and low cost. Approximately 2,000 yen for a 91cm x 91cm window.
supplement
This product was developed to make glass less likely to break. It is easy to use, just attach a special bolt to the outside of the window glass, insert the hollow polycarbonate sheet, and tighten it with the special metal fittings. It can significantly reduce the risk of window breakage due to typhoons. It also has a crime prevention effect against intrusion through the window. It has high insulation performance and reduces the heat in and out of the window by about half, resulting in about 30% energy saving effect. In addition, hollow polycarbonate has a noise reduction effect of 16db, so it is recommended for those who live near main roads or airports.
Hollow polycarbonate sheet (182cm x 91cm, thickness 4mm) can be purchased at a nearby home improvement store. Instructions on installation, cleaning, removal, and moving are included with the product.
[Test results]
1. The insulating and heat-blocking capabilities of window glass are limited (areas with only window glass are cold in winter and hot in summer)
2. The combination of panel and blinds is effective for keeping warm in winter, blocking heat in summer, and preventing the deterioration of the computer work environment caused by direct sunlight
3. There are no problems with strength even if the gap between the window glass and the hollow polycarbonate panel is more than 1cm *Actual results from two typhoons
4. If the window bolts are positioned too far inward, warping occurs, presumably due to heat
[1 set contents]
1 stainless steel base plate (diameter 3 cm),
1 stainless steel coin nut (diameter 3 cm), 1
stainless steel bolt (diameter 3 mm, length 7 mm, dish shape)
with instructions
1 set contents x 12 sets will be delivered.
[※Note: If you use it as a disaster prevention eco window, in addition to this reward (disaster prevention eco fittings), you will need hollow polycarbonate (182 cm x 91 cm, thickness 4 mm) and silicone. Please purchase at a home improvement store.]
[Recommended silicone Manufacturer: Konishi Co., Ltd. Product name: Busbond Q Part number: #04888]
*The number of window bolts required is one for every 50 cm x 50 cm square.
Disaster Prevention Eco-Window Installation Manual
*If you would like the latest information, please contact us using the details below.
NPO ESCOT
4-17 Azumakamicho, Kashiwa City, Chiba Prefecture, 277-0011
Testing site 768-22 Kamifuse, Onjuku Town, Isumi District, Chiba Prefecture
tel: +81-4-7166-4151
mobile: +81-80-4365-0861
fax: +81-4-7166-4128
ser.kashiwa@gmail.com
https://www.npo-escot.org