The main difference of profiles is the wall thickness. Generally, manufacturers of the same brand and series have two specifications, one is large wall thickness for engineering and samples, and the other is small wall thickness for small shops. Different window types range from 30-50 yuan per square meter (profiles of the same brand and specifications).
Steel lining is the most concealed thing. The steel linings used in engineering are generally full profiles, and the thickness is above1.5mm. If the in-store steel lining is not added, it will be less than 0.8, which is about 15-20 yuan.
At least 5+9+5mm hollow float glass should be used on the Qingdao side of the glass in this project, and double-sided tempered glass should be used according to national standards. Small shops use 3+9+3mm partition glass (glass flatness is poor). This can be 40-60 yuan.
Accessories are the trickiest part. A good nylon adjustable pulley can buy a pack of inferior plastic wheels, a high-grade alloy window lock can buy a dozen or more inferior plastic locks, and the price difference of accessories for casement windows is even greater. This is not clear in one or two sentences.
Production process:
One or two people in a small shop and at least one or twenty people in a medium-sized factory. There are no standards for small shops to complete, but factories generally follow national standards and have a perfect quality control system.
Through the above description, according to the comparison, it is better to be broad-minded, and I hope the answer can help you.