Energy Renovation in Chelles
In Chelles, an energy renovation often begins with the assessment of a house built at a time when insulation, ventilation and heating sizing met different standards. In many suburban districts, the works consist less in replacing everything than in restoring coherence between the building envelope and its equipment. GRAM Énergie supports you in determining which items to address, organising the order in which to tackle them and avoiding decisions taken in isolation. Lofts, heating, ventilation, hot water production and controls can therefore be studied within a single project, with particular attention paid to the characteristics of the existing property.
Tip: have your energy performance certificate (DPE) and energy bills to hand for a more accurate estimate.
Why renovate your home in Chelles
A significant part of the local residential fabric consists of post-war houses and estates built between the 1950s and the 1970s. In this type of house, uninhabited lofts are common and can be a logical starting point when they are poorly insulated or not insulated at all. The walls, the floors, the openings and the thermal bridges must then be examined so that the effort is not concentrated on a single area when the heat losses are spread across several parts of the building.
In the residential districts close to the Marne, houses have sometimes undergone successive renovations: windows replaced, a boiler changed at some point, insulation added in part, without necessarily reviewing the whole. Owner-occupiers may then benefit from taking up the project as a whole. An old gas boiler, for example, is not replaced in the same way depending on whether the loft already performs well or remains a major source of heat loss.
In older suburban houses, the condition of the loft can strongly influence the order of the works to be considered.
Our services in Chelles
Global energy renovation
A global energy renovation makes it possible to coordinate several interventions rather than dealing with each piece of equipment separately. It can encompass the building envelope, heating, ventilation, hot water and control systems. This method is particularly useful when a house has already undergone several partial renovations and it becomes necessary to check whether the various elements still work together coherently.
Heat pump
A heat pump can replace an old heat generator where the technical conditions allow. Before installation, the actual requirements of the property, the quality of the insulation, the type of emitters and the constraints on siting must be examined. The aim is not simply to replace one boiler with another technology, but to select equipment suited to the actual thermal condition of the house.
Insulation
Addinginsulation can involve the uninhabited loft, the walls, certain lower floor structures or other areas, depending on the house. In houses built in the middle of the twentieth century, the loft is often an item to check first. A survey of the building makes it possible to identify the areas that are genuinely weak and to determine which interventions can be combined without creating an imbalance with the existing ventilation.
Thermodynamic water heater
The thermodynamic water heater produces domestic hot water using equipment separate from the main heating system. How suitable it is depends on the space available, the layout of the rooms and the way air is drawn in and discharged. It can find its place in a renovation that also involves a change to the heating system or the replacement of an old electric cylinder.
Energy audit
An energy audit helps to understand how heat losses are distributed and which works should be considered together. It is particularly useful in a property that has been altered over the years, where some walls are insulated and others are not. The audit makes it possible to prioritise the works and to compare several scenarios before undertaking a more substantial renovation.
Mechanical ventilation (VMC)
Mechanical ventilation becomes an essential subject when a house is made more airtight by insulation or by the replacement of windows. Poorly matched ventilation can disrupt the renewal of indoor air. The system must therefore be studied according to the wet rooms, the routes available for ductwork and the general layout of the property, rather than treated as an element independent of the rest of the works.
Smart thermostat
A smart thermostat provides finer management of heating periods and target temperatures. It can complement a renovation where the heating system is compatible and correctly sized. Its role is to improve control, not to compensate for inadequate insulation. It therefore fits in as a complement to a project already structured around the actual requirements of the property.
Typical projects in Chelles
Suburban house with an uninhabited loft and an ageing boiler
the first task is to check the level of roof insulation before deciding to replace the heating system. Improving the envelope can change the thermal requirements and influence the choice of the future equipment.
1960s house already partly renovated
recent windows may sit alongside poorly insulated walls and ageing ventilation. The project must then identify the differences in performance between the various elements in order to avoid an unbalanced renovation.
Family home occupied for several years
where the occupants wish to keep the property in the long term, the works can be prioritised according to the condition of the building, the equipment to be replaced and the interventions that can be grouped within a single project.
Financial support for your works in Chelles
Depending on the nature of the works and the characteristics of the property, several schemes may be examined: MaPrimeRénov’ (the French state renovation grant), the CEE (energy saving certificates funded by energy suppliers), reduced-rate TVA (French VAT) and the éco-PTZ (an interest-free renovation loan). Whether they can be used depends on the project chosen and on the conditions applying to each application. Before planning the works, it is advisable to check which schemes correspond to the items envisaged. You can present your project through the contact form so that solutions suited to your situation can be considered. The French public service France Rénov’ lists the schemes currently in force.
Financial support must be assessed according to the scenario of works chosen for the property.
How we work
Gathering information
you describe your house, its heating system, the level of insulation known to you and the works already carried out.
Reading the priorities
the items likely to weigh most heavily on the property’s performance are identified.
Organising the scenario
the interventions are sequenced to avoid incompatibilities between insulation, heating and ventilation.
Choosing the equipment
the technical solutions are studied according to the building and not on the basis of a standard model.
Carrying out the agreed scope
the planned works are implemented according to the scenario defined for the project.
We also work throughout the rest of Seine-et-Marne
You can also consult our pages devoted to energy renovation in Melun, Pontault-Combault and Savigny-le-Temple. For a broader view of our work across the department, see the page energy renovation in Seine-et-Marne.
Frequently asked questions
Should the uninhabited loft be dealt with before the walls?
The order depends on the condition of each element and on the configuration of the building. In many suburban houses, the uninhabited loft is easy to identify as a sensitive area, but that does not remove the need to examine the walls and the floors. An overall reading makes it possible to choose the works according to how relevant they genuinely are.
What should be done when a house still has an old gas boiler?
It is best not to think solely in terms of replacing the appliance. The condition of the insulation, the existing radiators, the heating requirements and the installation constraints must be checked before choosing a new solution. This analysis makes it possible to determine whether the change of heating system should be preceded by other works.
Should a partial renovation carried out several years ago be reviewed?
Not automatically. It can, however, be useful to check how it fits with the rest of the property. High-performance windows, for example, do not on their own compensate for a poorly insulated roof or poorly insulated walls. The point is above all to identify the differences in performance that remain.
Does the ventilation have to be modified after insulation works?
It must at the very least be checked. A better insulated and more airtight house does not renew its air in the same way as before the works. The ventilation system must therefore remain consistent with the property’s new level of airtightness, so that air renewal is appropriate.
How can an energy renovation project in Chelles be prepared without doing everything at once?
It is possible to define an order of works without starting every item at the same time. The essential thing is to keep an overall logic: address the main heat losses, anticipate ventilation, then adapt the heating system and its controls. This order of priority makes it possible to build a phased project without losing technical coherence.
To prepare an energy renovation in Chelles, you can describe the characteristics of your property, the works already carried out and the equipment you are considering replacing through our contact form. GRAM Énergie will then be able to examine your project as a whole and guide you towards a scenario suited to the building.
Let’s talk about your project
Tell us about your home and your goals: we help you prioritise the works and identify the grants worth looking into.