What Is Thermal Break Aluminum Window Door ?

Ⅰ. Thermal Breaks in Windows and Doors

The thermal performance of windows is affected by the interior environment of the building, external weather conditions, and the way the window is installed. Glass choices and glazing options have a significant impact on thermal performance as well. In addition, window frame modifications can be made. These “thermally improved” frames incorporate one or more thermal breaks, also known as thermal barriers.

A thermal break is defined as a material with low thermal conductivity placed in an extrusion with the purpose of reducing the flow of thermal energy (heat).

thermal breaks

In aluminum windows, three types of thermal breaks are used. A standard pocket thermal break has been used in the window industry for decades. An AA-sized pocket is shown below. During manufacturing, a polymer much like epoxy is poured into a pocket in the metal extrusion. After the polymer solidifies, a specialized saw cuts through the pocket wall of the entire length of the extrusion to “debridge” the interior and exterior sections. This process is known as pour and debridge.

An AA-sized poured



A window with dual poured and debridged pockets

Deeper poured and debridged pockets increase the thermal efficiency of the window. A CC-sized pocket is shown below. However, there are structural limitations to the size and depth of the pocket.


In the last decade, a different type of thermal break has been used to enhance thermal performance beyond the capabilities of poured and debridged pockets, albeit at a higher cost. This process uses polyamide strips with very low conductance and relatively high structural strength. Using specialized equipment, the strips are “stitched” into slots in the extrusions.


A thermal break using 23mm polyamide strips

Ⅱ. Benefits of thermal break aluminium windows and doors

Sound insulation:
Sealing strip ensures that the window is well sealed, its structure is carefullydesigned, the joints are tight, the experimental results, sound insulation 35db, which is inline with national standards.
Conducts heat and noise 1000 times slower than normal aluminium.

Impact resistance:
Since the outer surface of the casement window is aluminum alloy profile, the impactresistance of the aluminum alloy is better than other doors and windows materials.

Air tightness:
Multiple sealing tops or strips are installed at each joint of the heat insulation window.The airtightness is eight grades, which can fully exert the air conditioning and save 50% energy.
Thermal break window frames are insulated against hot and cold conduction. The thermal break prevents conductive thermal energy loss.

The doors and windows are designed with rainproof structure to completely insulate therainwater from the outside, and the watertightness conforms to national standards.

Excellent hardware accessories High-quality materials ensure window security.

Maintenance-free And Durable:
Broken bridge insulation profiles are not easily attacked by acid and alkali, will not turnyellow and fade, and almost no maintenance. When it is dirty, it can be cleaned withwater.

Post time: Oct-18-2021