Solar thermal in Brigue-Glis: A complete guide for your renovation

With an annual global irradiation of 1477 kWh/m² and a climate characterized by 62 frost days, the installation of solar thermal collectors in Brigue-Glis is a relevant solution to reduce dependence on fossil fuels. The municipality aims for an ambitious energy transition, supported by its Energy City Gold status.

Undertaking these works is ideal when replacing your boiler or during roof renovation to minimize logistical costs.

4 °C, requires rigor in the choice of equipment. Planning ahead allows you to fully take advantage of sunny days to cover a large portion of your sanitary hot water needs.

By acting now, you align your residence with the cantonal goals for decarbonizing the building stock by 2050 while significantly improving the overall energy efficiency of your home.

The sizing of a solar thermal installation depends directly on your actual consumption and the available roof surface.

The market offers two dominant technologies : flat plate collectors, which are robust and economical, and vacuum tube collectors, which are more efficient when outside temperatures are very low, as is often the case during the Valais winter.

Coupling with your heating system is a decisive choice. Solar collectors generally cover a large part of the summer hot water needs. If you are considering a combination with a heat pump, a rigorous sizing study is essential to ensure compatibility between solar thermal production and the storage tank.

The quality of materials, especially pipe insulation, is essential to limit heat loss between the roof and the boiler room, especially in an environment where frost is present for several weeks a year.

Energy renovation in Brigue-Glis requires a precise analysis of the state of the existing structure.

For buildings built before 1990, it is imperative to check for the potential presence of asbestos in construction materials, particularly in old pipe insulation or roof coverings, before any drilling or installation work.

Houses built during past decades often have hydraulic networks that require updating to accommodate the flow of new heat transfer fluids. The insulation of the overall envelope also influences the yield of your installation: installing solar collectors on an uninsulated structure is rarely relevant.

It is recommended to prioritize a comprehensive energy renovation of the envelope before adding the solar system, to ensure that the heat produced is effectively retained. A check of the roof's structural integrity is also necessary, as the collectors add a significant permanent load to the roof.

Any external modification to your roof requires prior verification with the urban planning services of the municipality of Brigue-Glis. Although solar thermal is encouraged within the framework of the municipal energy strategy, restrictions may apply if your home is listed or located in a heritage protection zone.

It is highly recommended to contact local authorities at the beginning of your reflection. Inquire about possible architectural integration constraints, such as the color of frames or the inclination of collectors, to ensure harmony with the surrounding buildings.

Do not sign any firm quote before receiving information confirming that your project complies with the municipality's requirements. In case of doubt, submitting a simplified building permit application is often the safest way to avoid any subsequent administrative disputes.

Compliance with neighborhood rules and fire safety regulations must also be integrated into your submission file.

The canton of Valais offers specific support for solar thermal through the building program. It is crucial to note that the order of steps is imperative: you must mandatory submit your aid application before starting the work.

Once work has started, it is no longer possible to claim these grants according to current rules.

ch'. This financial support helps lighten the initial investment. In addition, investments aimed at energy efficiency are often deductible from your taxable income, which constitutes an additional tax advantage.

Keep all invoices and certificates of compliance carefully after the site is completed, as they will be needed to finalize your payment request file with the competent authorities. Do not hesitate to check annual updates of the amounts, as encouragement policies may evolve according to cantonal priorities.

The realization of a solar thermal project follows structured steps, from design to commissioning. The process begins with an in-depth technical evaluation, followed by the submission of the grant application. Once the building permit is obtained, the execution phase can begin.

It is preferable to plan the work outside of intense frost periods, although the climate of Brigue-Glis allows for interventions over a large part of the year. The spring and summer months are often preferred, facilitating roof access and worker safety.

Once the equipment is delivered, the site is broken down into three main phases: installation of supports and collectors on the roof, routing of thermal pipes to the technical room, and finally the connection to the storage tank and commissioning.

Commissioning is the final step, during which the adjustment of regulation parameters ensures the optimal yield of the installation. Allowing sufficient time for each step helps to avoid haste that could be detrimental to the quality of the finishes.

To guarantee the success of your project, avoid underestimating the importance of a rigorous sizing study. A poorly calibrated installation will not meet your actual needs and can lead to inefficient operating cycles. Never neglect aesthetic integration, at the risk of having to modify the installation later.

Before requesting quotes, check that your framework can support the load of the collectors and ensure there is no asbestos in the elements to be drilled. Always compare several detailed quotes regarding equipment and labor.

Systematically check the quality labels of the proposed products and ask for references for similar projects carried out in the region. Finally, do not forget to confirm that each selected contractor complies with the cantonal requirements for the subsidy program.

Meticulous planning remains your best ally for a sustainable installation.

A well-maintained solar thermal installation can operate efficiently for several decades. It is advisable to schedule an annual visual inspection of the collectors to check for the absence of fouling or damage caused by local weather conditions.

Verifying the pressure of the heat transfer fluid in the closed circuit is a fundamental technical step to be carried out every two to three years, ideally by a qualified professional. This fluid, which circulates between the roof and the storage tank, can degrade over time under the effect of extreme temperatures.

The durability of your system also relies on managing limescale in your installation. In a region where water can be hard, regular maintenance of the storage tank components prevents deposits that reduce the efficiency of heat exchange.

By respecting these few maintenance steps, you protect your investment and maximize the energy savings generated throughout the life of your equipment. A well-maintained system is the guarantor of lasting peace of mind in the face of climatic variations in Brigue-Glis.