Snow melting: Asphalt

Snow melting under an asphalt driveway

The heating goes into the pavement itself, between the base coat and the finished top coat, so an asphalt driveway can melt snow without anything visible on the surface.

Cutaway of an asphalt driveway showing snow melt cable fixed to a metal frame between finished asphalt, a base coat and compacted gravel
Image: WarmlyYours
Cutaway of an asphalt driveway showing finished asphalt, a snow melt mat, the base coat of asphalt and compacted gravel
Image: WarmlyYours. Cross-section with a snow melt mat. The cable version is at the top of this page

How an asphalt driveway is built for snow melting

The heating elements are part of the paving build-up, protected between two layers of asphalt.

Layers, top to bottom

  • Finished asphalt (top coat)
  • Snow melt mat or cable
  • Base coat of asphalt
  • Compacted crushed-stone gravel base

How installation goes

The order of work matters: the elements are protected and tested as the surface goes on.

  1. A solid base

    The paving contractor prepares a compacted crushed-stone base ready for the asphalt.

  2. Base coat

    The base (binder) coat of asphalt is laid and rolled smooth. The paver and the electrician agree whether it cools first.

  3. Elements go down

    Mats, or cable fixed to a frame, are laid on the base coat. The electrician routes the cold leads in conduit to a junction box and places the sensor.

  4. Top coat, with care

    The top coat is spread over the elements to at least the manufacturer’s minimum thickness, without heavy equipment running over exposed cable.

  5. Testing throughout

    The electrician tests the elements as the asphalt goes on and again once it is finished.

Working with the paving crew

Asphalt is laid hot and fast, so the plan has to be agreed before the trucks arrive.

  1. One plan for both trades

    The paving contractor and the electrician need the same layout, the same order of work and the same schedule.

  2. No heavy machinery over the elements

    Exposed cable and mats must not have heavy equipment run over them, which affects how the top coat is spread.

  3. Coverage changes the method

    Tire-track coverage leaves room for a machine spreader on some driveways; full coverage generally calls for hand spreading.

Mat or cable in asphalt

Both are installed in asphalt. The shape of the area and how the paving is done usually decide which one, or which combination.

Open areas

Snow melting mat

Heating cable pre-spaced on a mesh, rolled out over the base coat.

  • Suited to square or rectangular driveways and walkways
  • The spacing is built into the mat
  • Comes in set widths and lengths

Shapes and curves

Snow melting cable

Loose heating cable fixed to a frame, laid to the shape of the area.

  • Suited to curved or irregular layouts and stairways
  • Can be laid at different spacings to raise or lower heat output
  • Takes more installation time

Asphalt questions

Direct answers. Your design confirms the details for your property.

Can snow melting be installed under an asphalt driveway?

Yes. Heating mats or cable are laid on the base (binder) coat of asphalt and covered by the finished top coat, so the system sits inside the pavement and is not visible once the driveway is finished.

Does the heat damage asphalt?

The systems are designed and specified for use in asphalt, and the manufacturer publishes an installation method for it. The design, the paving contractor and the electrician follow that method so the elements are protected while the asphalt is laid.

Can I add snow melting to an existing asphalt driveway?

Often. The manufacturer’s manual describes cutting grooves into finished asphalt, laying heating cable in them and filling them with sealer. Whether that suits your driveway depends on its condition, so an assessment confirms the options.

Who does the work on an asphalt driveway?

The paving contractor lays the base and asphalt, and a qualified electrician places, connects and tests the heating elements. MeltGrid coordinates the design and the two trades.

Should I choose a mat or a cable for asphalt?

Mats suit open, square or rectangular areas. Cable suits curves and irregular shapes, and can be laid at different spacings. Your design chooses between them, or uses both.

Planning snow melting for asphalt?

Tell us about the surface and the area. We come back with a design and an estimate.

Request free design