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Lay out your attic

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Blow insulation

Welcome to the website TCH ALPES of Harnois network

Processes Harnois, creators of sustainable constructions

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Attics

Attic and trusses arrangement. Give a new life to a home that became too small!
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Isolation

Gain energy efficiency.
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Extensions

Gain liveable space without encroaching upon your garden!
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Blow insulation

Natural insulation for attics, crawling, walls and roof repairs.
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Elevation

A vantage point to better see the big picture!
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Wine cellar

Offer a real cellar to your home!

About Us

TCH ALPES of Harnois group, LEADER for 30 years in attic layout, particularly the framework modifications of American farmhouses, carrying out basements, porches, custom home extension and roofs elevation in the departments of Ain, Isere, Rhone, Savoie, Haute-Savoie and the Gex.

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Our servicess

  • Attic layout.
  • Frames modification.
  • Cellars construction.
  • Verandas construction.
  • Custom extensions for your home.
  • Roofs elevation.

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OUR EXPERTISE

Our Achievements

Attics layout, Roofs elevation
Wine cellar, Expansion, Veranda

See our achievements