What It Means

A thermal break is a material or component with low thermal conductivity placed between two conductive parts to interrupt heat flow. It’s the fix for a thermal bridge. Common examples are polyamide strips in aluminum window frames, structural thermal break connectors at balcony slabs, insulating pads under steel connections, and thermally broken clips for cladding.

Why It Matters

Concrete slabs, steel beams, and metal framing that pass through the insulation carry heat straight across it. Thermal breaks reduce that heat loss and keep interior surfaces warmer. Warmer surfaces lower the risk of condensation and mold at those spots.

Best Practices

• Find where structure passes through the insulation layer early in design: balconies, canopies, parapets, shelf angles, and roof dunnage.
• Coordinate with the structural engineer. A thermal break has to carry the load as well as block the heat.
• Use thermally broken frames and cladding attachments where the energy target calls for them.
• Line up the thermal break with the insulation layer so the two form one continuous plane.

Real-World Use

On a concrete building with cantilevered balconies, a structural thermal break connector separates the balcony slab from the floor slab at the insulation line. On a metal panel wall, thermally broken clips hold the rails while limiting heat flow through the insulation.

Limitations

• Structural thermal breaks add cost and require engineering coordination.
• They reduce heat flow but don’t eliminate it, so the junction still needs to be accounted for in energy calculations.
• Fire, acoustic, and durability requirements can limit which products work.

In Simple Terms

A thermal break is a heat stopper placed in the middle of a metal or concrete connection, like the plastic handle on a metal pot.

Go Deeper

For more details, check our blogs. For how thermal continuity is maintained across transitions, see Building Envelope Control Layers and Continuity. For one product approach, see Using Structural Insulation Blocks: Essential Considerations for Building Assembly.

How D.TO Helps

Thermal breaks sit where structure, envelope, and product selection meet, which makes them easy to leave for later. D.TO helps teams address those junctions while detailing and connect with the products that solve them, so thermal performance is part of the detail from the start instead of a late fix.

See how D.TO fits into your daily design workflow on the key features page, or schedule a demo to explore it in more detail.