Global energy renovation in Nord (59)
A global energy renovation in Nord (59) involves coordinating several improvements within the same home rather than dealing separately with each system or building element. In a department characterised by brick terraced houses, deep-plan older homes, poorly insulated lofts and ageing heating systems, this approach helps establish coherent priorities. The aim is to consider the building envelope, air renewal, heating systems and the specific constraints of the property before defining the work to be carried out.
Tip: have your energy performance certificate (DPE) and energy bills to hand for a more accurate estimate.
Why carry out a global energy renovation in Nord
In an older town house, heat loss is not distributed evenly. Party walls are less exposed than the street-facing façade, the rear of the property, an exposed gable or the roof. A whole-house approach therefore makes it possible to focus improvements on areas that are actually in contact with the outside. It also avoids replacing a heating system before examining defects in the envelope, air leakage or the existing ventilation.
The humid and windy climate also reinforces the value of a coordinated approach. A cold surface, a poorly sealed window and insufficient ventilation can all affect the same room. In Nord, the assessment therefore considers both reducing heat loss and ensuring suitable air circulation and compatibility between the different solutions. The project must also take urban constraints into account: access to façades, parking, material deliveries or appearance requirements in certain areas.
What a global energy renovation includes
A whole-home assessment
A global energy renovation begins with an assessment of the main areas: roof, façades, floors, windows, ventilation, heat production and hot water. This combined review helps identify the interactions between the proposed improvements. In a terraced house, for example, it is not appropriate to treat every wall in the same way, since some walls adjoin a neighbouring property.
Treating the building envelope
Lofts, roof slopes, exposed façades, gables and openings are assessed according to their condition and configuration. In older brick buildings, the choice of solution must take account of the actual composition of the wall, its exposure and architectural constraints. External insulation is not automatically suitable for a façade directly aligned with the street.
Adapting the heating system
Replacing or upgrading the heating system is considered after assessing the building’s needs. Homes fitted with older gas boilers and radiators designed for high water temperatures require particular attention. The choice of a new system depends in particular on the level of thermal protection achieved, the existing heat emitters and the space available for the various components.
Ventilation and air renewal
Improving the airtightness of a home without checking its air renewal can shift problems rather than solve them. Ventilation is therefore included in the programme. Wet rooms, poorly ventilated spaces and areas where condensation appears require specific attention. Air inlets and transfer paths between rooms must remain compatible with the windows and systems selected.
Phasing the work
Not all improvements necessarily have to be carried out in the same way or at the same time. Their order must nevertheless remain logical. Work on the envelope, services, ventilation and systems is organised to avoid unnecessary rework. This phasing is particularly important in occupied homes or dense streets where access, storage and deliveries are more constrained.
Typical situations in Nord
Brick terraced town house
The property has a narrow street-facing façade, a rear façade overlooking a courtyard and older loft space. The strategy may prioritise the roof and the walls actually exposed to the outside, then examine the windows, ventilation and heating system. Party walls shared with neighbouring houses are not treated like external façades.
Former workers’ house with limited internal volume
In a courtyard development or older workers’ estate, rooms can be compact and technical options limited. Adding a substantial thickness internally can noticeably reduce the available floor area. The project must therefore strike a balance between treating the walls, roof, windows and systems while maintaining suitable air circulation.
Urban home with restricted access
In Lille, Roubaix or Tourcoing, site organisation can influence certain solutions. A façade directly on the street, the absence of storage space or narrow access can affect the choice and sequencing of the work. The renovation programme takes these constraints into account before a technical scenario is selected.
Grants and funding
Depending on the nature of the project and the conditions applying to the application, a whole-house renovation may be eligible for MaPrimeRénov’, CEE (energy savings certificates), reduced VAT or the éco-PTZ (zero-interest eco-loan). Eligibility conditions are not the same for every scheme. Some grants notably require specific technical characteristics or the use of RGE-certified professionals for the relevant work.
Before finalising the programme, you can contact us to clarify the proposed work and the order of the steps involved. To check the official rules, eligibility conditions and support pathways, you can also consult the public service website France Rénov’.
How we work
Property assessment
We review its configuration, exposed walls, existing systems, access constraints and any points requiring further investigation.
Setting priorities
The different areas are prioritised by considering the interactions between the envelope, indoor air, heat production and how the home is used.
Building the programme
Compatible solutions are grouped into a coherent package, with a sequence suited to the property.
Preparing the work
Street access, deliveries, storage, movement within the property and any preliminary procedures are incorporated into the organisation.
Following the process
The different stages are coordinated to maintain the logic established at the outset and limit rework between trades.
Our other services in Nord
A project may also require a more targeted assessment. You can consult our pages on heat pumps in Nord, insulation in Nord, thermodynamic water heaters and energy audits. You can also find the department energy renovation page, our Hauts-de-France page, as well as local information for Lille and Roubaix.
Frequently asked questions
Do all the walls of a terraced house need to be insulated?
Not necessarily. Walls adjoining neighbouring homes do not have the same heat exchange as façades in direct contact with the outside. In a terraced house, the assessment focuses first on the roof, front and rear façades, any exposed gables and the other weak points of the building.
Can an existing boiler be kept as part of a global renovation?
Yes, if retaining it remains compatible with the selected scenario. A whole-house renovation does not mean that every system must automatically be replaced. Its condition, operation, the existing heat emitters and the property’s needs after improvements to the envelope are assessed before deciding whether it should be replaced or retained.
Does damp prevent a whole-house renovation from going ahead?
The source of damp must first be understood. Condensation, water ingress, a ventilation defect or another cause do not require the same response. Covering a wall without identifying the cause can make the situation worse. The energy improvements must therefore be defined with regard to the actual condition of the surfaces and the air renewal system.
Do façade constraints change the project in a town centre?
Yes. A façade aligned with the street or subject to appearance requirements can make certain external solutions difficult or require preliminary procedures. The scenario may then shift towards other parts of the building or a suitable internal solution. Site access and the delivery of materials must also be anticipated in dense urban areas.
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.