Lead - Free
Our uPVC windows and doors are safe and non-toxic
• welcome to Cojak International Incorporated•
We are a window company established in November 2010. It is primarily engaged in the manufacturing of
made-to-order uPVC Windows and Doors. We have been expanding our reach by tapping developers, architects
and contractors both locally and globally.
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Water Tightness
Even the smallest amount of water can cause damage to your home. Cojak has a high standardized fusion welding & specifically designed stair type structure helps prevent water breakage all throughout.
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Wind Load
There is close correlation between wind load & safety because most of the claims & defects root in breakage using of low quality window. We recommend to use Cojak's premium quality uPVC windows.
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Smooth Opening & Closing
PVC material has a unique feature of being self-lubricating. Alignment and coefficiency friction between roller and tracks are the key factor to maintain smoothness
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Sound Insulation
Sound insulation depends upon glass thickness & type; however the importance of mat'ls cannot be passed over.Thus drawing capability & fabrication quality in fusion welding parts should be considered.
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Air Tightness
Cojak's uPVC window have a superior air tightness property owing to low coefficient or permeability comparing to other materials.
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Anti-Chemical Property
Special additives were added to prevent aging or discoloration that the product may be safely used for a longer period of time. Cojak's products are highly resistant to ocean wind containing salinity.
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Fire Resistant
uPVC windows and doors which are based on naturally fire retardant polymer have excellent fire performance qualities since it is self-extinguishing when flame is removed.
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Thermal Insulation
PVC mat'l itself is a poor conductor of heat or cold making it thermal efficient resulting to lower electricity bills compared to aluminum windows.That's why we call it as "energy saving products."
