Most importantly, Dalian Shide plastic doors and windows, be sure to buy the factory floor with professional equipment manufacturing steel doors, check whether the doors and windows manufacturers Construction Committee issued a production license. Do not buy cheap steel doors and steel doors and windows, street workshop production of plastic windows Shide plastic doors and windows, its quality and reputation are not guaranteed. Finally, we want to emphasize that it is important to select steel windows should also shop around. If conditions are the best person to look at manufacturers like windows. But shop around and not simply "bid three" because of door and window products like appliances and other products just look for the brand, model, choose the lowest price you can. PVC window profiles profiles for a wide variety of manufacturers, even if the same choice of steel liner, accessories, hardware, different level of processing, installation and service levels are different quality windows and doors will have a greater difference. Shijiazhuang gorgeous windows and doors to help you analyze the deformation of steel doors and prevention measures are: (1) PVC window profiles should be used in multi-chamber type, thickness not less than 2. 2mm. Lining plate thickness of not less than 1.2mm. (2) steel window section: casement windows for multi-storey building is not less than 50 series; senior casement not less than 60 series; sash windows do not kid 80 series; sealed plastic window balcony of not less than 85 series. Ramada doors _ Shide steel doors and steel doors _ provided by the gorgeous windows and doors. Search for "Shijiazhuang sun room, bridge aluminum doors and windows, shower room, glass partition" reliable suppliers, network operators choose to have a full alliance Certified: Shijiazhuang Sino-American Door (www.sjzygf.com), trustworthiness and reliability, now "Commercial Union Service" page click on the live chat with us now!