News
Regulation, field practice and tools: our analysis to help renovation professionals sell and deliver energy retrofits.

On a job, a questionable electrical installation can quickly turn a simple fix into a headache, for you and for the client. With a structured check upfront, you spot the risk points, prioritise the corrections and secure the handover without bad surprises. The result: fewer round trips, more trust, and a job that moves forward smoothly.
5 min read

Electric backup isn't a comfort option, it's part of the sizing. The French NF DTU 65.16 caps the heat pump at 70 to 100 % of the design heat loss D and requires heat pump plus backup to reach 1,2 × D. And it closes a door that many sizing notes leave open: a stove or storage heaters already in the property never count as backup.
5 min read

At your clients' homes, a wood-fired cooking appliance can do double duty. It's a real plus when they want steady heat, a simple backup in case of a power cut, and daily use without multiplying equipment. With the right installation and safety habits, you turn a 'practical' request into a clean, durable, value-adding job.
4 min read

On a job site, a few well-placed signs quickly head off neighbours' complaints, and above all trouble in the event of an inspection or accident. As a tradesperson, it's in your interest to organise visible information as soon as you arrive on site, to secure access, prevent risks and display what's legally required. It's simple to set up, and it saves you time, not the other way round.
5 min read

When a project demands zero compromise on fire safety and watertightness, you need an insulation material that stays reliable even in humid environments, basements, or flat roofs. This one ticks those boxes without asking you to cut corners on installation, and it holds up well over time. That means secure performance and finishes, plain and simple.
5 min read

On a house over 200 m², the real challenge is volume. Every extra room weighs on the budget, the schedule and the final comfort, especially when air circulates poorly and uses multiply. You save time when you set a clear method right away: priorities by zone, phasing of work, and a simple view of the costly items.
5 min read

When the temperature drops, defrosting becomes the little pause that can make a client uneasy. As a tradesperson, you have everything to gain by simply explaining what's happening, when it's normal, and how to limit the loss of comfort and efficiency. With the right settings and a careful installation, winter stays a season of results, not surprises.
5 min read

You want to offer your customers wood heating that can supply both hot water and radiators, without multiplying equipment. Between the stated output, the share actually sent to the hydraulic network, and installation constraints, the differences come down to a few concrete choices. Here, we lay out the key points to price accurately and install cleanly, from the first survey to the first fire.
6 min read

Pellets emit carbon monoxide without any combustion, through self-heating and oxidation of the fatty acids in wood. France's ANSES documented a 2026 case at 700-1,000 ppm in a basement and a Swiss fatality at 7,500 ppm. The store has to be sealed off from living space and ventilated.
6 min read

Radon kills 2,500 to 3,000 people a year in France. Dosimeter measurement, slab airtightness, redesigned ventilation and SSD: the technical levers to master during renovation.
6 min read

You're looking for a bio-based insulation that holds up without blowing the budget. This plant-based bale material installs quickly, details cleanly on site, and helps you offer a lower-impact renovation without complicating your habits. With the right installation details, you keep the performance and secure the trade's insurability.
5 min read

In a T1 studio, every square metre counts. As a tradesperson, you can gain comfort without sacrificing space, by combining well-targeted insulation, controlled ventilation and compact equipment, from correctly sizing the heat pump to a smart tank. With a clear method and suitable choices, you deliver a result that performs, lasts, and is easy to explain to the client.
5 min read
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