A look at profiles:

    Profile quality good or bad, directly determine the pros and cons of windows, doors and windows with low-grade production of low intensity profiles, easily change color, deformation.

    Requirements on the profile:

    I, Appearance: natural color, smooth surface, uniform.

    Ii, multi-cavity structure: independent drainage cavity and steel increased cavity, lined to prevent rust, better insulated from the noise reduction effect.

    Iii, a certain degree of strength and flexibility.

    Iv, to prevent lead poisoning, should be used lead-free green profile.

    Second look accessories:

    Hardware, steel liner, top accessories such as the selection is the key to making high quality windows and doors, plastic doors and windows with Insulating Glass Machine, the weight per square meter may exceed 40 kg, therefore, demanding a variety of accessories. Quality components of different manufacturers vary widely, several times the price difference. Use of inferior parts would damage a short time, resulting in sagging sash, sliding fixed, switch lax, poor seal, or even be a security risk, there are many bitter lessons in this regard.

    Three to see made:

    Production equipment and processes determine whether the excellent overall performance windows and doors. According to national standards, the difference between the diagonal of plastic doors and windows should be controlled within 2-3 mm, and the strict control of process parameters, which requires a certain production equipment and processes to ensure that the quality of excellent staff . Therefore, workshops and regular street manufacturers of plastic doors and windows, the quality of a big difference.

    4 Installation view:

    One-third of production, seven installation, if not pay attention to installation standards, doors and windows may cause subsequent deformation. The thermal expansion coefficient of steel doors and windows are almost 6 times the steel, window frames and so must be left between the wall joints to prevent thermal expansion and contraction or deformation of housing minor settlement to doors and windows. At the same time to ensure waterproofing, insulation, sound insulation, expansion joints must be filled with elastic material, then sealed with a sealant. These materials are more expensive, the quality varies widely, installation and shoddy to prevent cutting corners.

    5 to see services:

    Life of plastic doors and windows for 30 years, in the course of the inevitable broken glass, damaged hardware, etc., and users themselves more difficult, requiring manufacturers to provide long-term comprehensive after-sales service, certainly higher than the regular factory choose mobile workshop much more reliable.

    6 to see prices:

    Price to shop around, but in the same material and performance based on the ratio of the price, if it continuous to be cheap, compare price and performance trade-off is not at the expense of always people