Renovating a house is no longer just about choosing between a coat of paint and new tiles. The reform of MaPrimeRénov’ encourages homeowners to think of their renovations as a coherent whole, where each aesthetic aspect must align with an energy component to remain eligible for aid. This logic of high-performance global renovation redefines how to plan a project, from the structural work to the garden layout.
DPE Constraints and Sequencing of Renovation Work
Small isolated jobs (like replacing a window or partial wall insulation) are gradually losing their eligibility for public subsidies. The focus on renovations that allow for a gain of several DPE classes requires precise sequencing of interventions.
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We recommend addressing the thermal envelope first (insulating the attic, external wall insulation, replacing windows) before any interior beautification. Applying decorative plaster on an uninsulated facade means investing twice: once for aesthetics, and again when external insulation requires redoing the cladding.
For landlord homeowners, this constraint is even more direct. A property classified F or G can no longer be offered for rent without prior energy-related work. Simple beautification is no longer enough to enhance a rental property.
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This sequenced approach also applies to the garden: installing a terrace before addressing peripheral drainage or foundation waterproofing exposes one to costly repairs. We observe that the best-managed projects incorporate from the start a plan that links building performance and outdoor arrangements. Exploring the work proposed by Brico Déco Jardin allows for visualizing the extent of tasks to coordinate in this type of project.
Interior Work: Balancing Thermal Comfort and Finishes
A high-performing interior project begins with ventilation. Installing a double-flow VMC before redoing partitions and coverings avoids drilling into new finishes afterward. Ventilation also conditions the choice of materials: a lime plaster breathes better than an acrylic paint in poorly ventilated old buildings.
Floors, Walls, and Ceilings: Order Matters
The classic sequence remains ceiling, then walls, then floor. In a heavy renovation project, we add an intermediate step: the routing of electrical and plumbing networks between the demolition phase and the installation of interior insulation. Grouping these trades reduces back-and-forth between professionals.
The choice of flooring deserves special attention. Large-format tiles laid on a low-temperature underfloor heating system provide better thermal performance than thick underlay floating parquet. Conversely, in a room without underfloor heating, solid wood flooring offers pleasant inertia in mid-season.
Kitchen and Bathroom: High-Impact Areas
These two rooms concentrate the majority of the interior renovation budget. We advise prioritizing thermostatic faucets and water-saving fixtures before selecting furniture. A high-performance mixer reduces hot water consumption, easing the load on the production system (boiler, thermodynamic tank, heat pump).
- Replacement of the electrical panel if the installation is over twenty-five years old, to comply with NF C 15-100
- Insulation of walls from the inside with correction of thermal bridges at window sills
- Installation of an extra-flat shower tray with a high-flow siphon, anticipating accessibility for people with reduced mobility
Exterior Layout and Garden: Drainage, Vegetation, Surfaces
The garden is not a secondary aspect in a global renovation. Poorly drained land causes capillary rises that degrade insulation at the base of walls. Before any planting or terrace installation, soil diagnostics (clay or sandy nature, depth of the water table) determine the type of drainage to install.
Terraces and Fences: Material Choices
Composite wood has largely replaced treated pine for terraces. Its durability without maintenance offsets a higher initial cost. For fences, gabions (metal baskets filled with stone) are gaining ground over molded concrete: they absorb noise, require no heavy foundations, and integrate well into landscaping.
A often-overlooked point: low-voltage LED outdoor lighting is ideally wired during excavation work. Adding conduits afterward in a paved walkway costs significantly more.
Vegetation and Water Management
The trend towards dry gardens (gravel, Mediterranean plants, mineral mulch) responds to the scarcity of water resources. Coupling this approach with a rainwater harvesting tank allows for watering a vegetable garden or thirsty flower beds without relying on the network.
- Landscaped swales to manage runoff and reduce the load on the sewer system
- Mixed countryside hedges rather than monoculture thujas, to promote biodiversity and limit maintenance
- Bioclimatic pergola with adjustable slats, extending the use season of the terrace without adding outdoor heating
Renovation Budget: Balancing Aesthetic and Technical Aspects
The temptation to allocate most of the budget to visible finishes (fitted kitchen, designer bathroom, exotic wood terrace) clashes with technical reality. One euro invested in insulation or ventilation generates more property value than one euro spent on a quartz countertop.
We recommend a distribution where structural work and the thermal envelope absorb at least half of the financial envelope. The remainder is divided between technical second work (electricity, plumbing) and finishes. This hierarchy ensures that the visible work, done last, is based on a solid and sustainable foundation.
In a project including the garden, allocating a specific budget line for drainage and excavation avoids unpleasant surprises. These invisible aspects once completed are, however, the condition for the durability of any outdoor arrangement.
The logic of global renovation, driven by regulatory developments, transforms each project into an exercise in coordination. Homeowners who integrate from the design stage the connection between energy performance, interior comfort, and landscaping achieve a coherent result, valuable both at resale and for daily use.