A 38mm window section typically refers to the thickness of the frame or profile used for a window, often made of materials like aluminum or UPVC. This thickness is a key factor in the window's durability, thermal performance, and overall appearance. 

Here's a more detailed breakdown:

Material:

• Aluminum:

  38mm aluminum sections are commonly used for windows, particularly in sliding and casement styles. 

• UPVC:

  UPVC (Unplasticized Polyvinyl Chloride) is another popular choice for window frames, and 38mm sections can also be found in UPVC windows. 

Features:

• Thickness:

  The 38mm refers to the thickness of the window frame or profile. 

• Surface Treatment:

  Aluminum sections can be powder-coated or color-coated for added protection and aesthetic appeal. 

• Glass Thickness:

  While the section thickness is 38mm, the glass used in the window can also have a thickness, often varying depending on the window type and insulation requirements. 

• Sliding or Casement:

  38mm sections are used in various window styles, including sliding windows with 3 tracks and casement windows. 

• Sliding Windows:

  3-track sliding windows, for example, often feature 38mm aluminum sections for the frame, with multiple sashes that slide along the tracks. 

In Summary: A 38mm window section refers to the thickness of the frame, often made of aluminum or UPVC, and is a key factor in the window's construction and performance.