J.Fretz GmbH is active in the building envelope sector.

We are simply different!

We are simply different!
Take the time to get to know us.
You can get a first impression on the following pages. Have fun!!!
If you have any questions, just get in touch with me.
Jürg Fretz

Spengler work in copper

Everything to do with roofs. We build roofs for new buildings and we specialize in roof renovations for existing properties

Roof renovations

Removal taking into account the structural characteristics, a prudent approach to correct reconstruction and the sustainable closure of the building envelope.

Our core specialty is roof renovations, especially for buildings from the 60s, 70s and 80s.

Service work

Everything to do with roofs. We create roofs for new buildings and we specialize in roof renovations for existing properties.

Stone tile roof

Everything to do with roofs. We create roofs for new buildings and we specialize in roof renovations for existing properties.

Photovoltaic systems

Everything to do with roofs. We create roofs for new buildings and we specialize in roof renovations for existing properties.

Snow removal

We clear your skylights of snow and entire roofs of snow loads, initiate controlled slides, clear forecourts, driveways and access roads on call or by subscription during your absence.