Insulation in Pas-de-Calais (62)
Insulation in Pas-de-Calais (62) must be defined according to the existing building, its exposure and the areas where heat loss actually occurs. The department includes mining-era houses built with solid brick, coastal homes exposed to wind and humidity, as well as rural properties that may have undergone little renovation. Depending on the situation, priorities may include lofts, walls, floors or windows. A coherent approach therefore involves identifying the most vulnerable surfaces, choosing solutions compatible with the existing materials and maintaining suitable air renewal after the work.
Tip: have your energy performance certificate (DPE) and energy bills to hand for a more accurate estimate.
Why insulate in Pas-de-Calais
In former mining areas, terraced houses often have party walls along a significant part of their envelope. This configuration limits some lateral heat loss, but leaves the roof, front and rear façades and any gable walls directly exposed. Lofts may also still contain an old layer of insulation that has become uneven or compressed. In this type of property, the assessment should distinguish surfaces already protected by adjoining homes from those that require priority treatment.
On the Pas-de-Calais coast, driving rain, wind and sea spray require particular attention to the condition of façades and windows. Before adding insulation, it is important to check that the substrate is suitable and that an existing moisture problem is not simply being concealed. Once airtightness has been improved, ventilation also becomes a central issue: a better-insulated home with insufficient air renewal may experience more condensation on any remaining cold areas.
What insulation includes
Loft and roof insulation
Insulation of the upper parts of a property is one of the first areas to assess in many houses. Unconverted lofts, converted roof slopes and attic floors require different techniques. The condition of the existing insulation, its thickness, continuity and the accessibility of the space are checked to determine whether it should be supplemented, renewed or replaced.
External wall treatment
Solid brick walls frequently found in the department can be treated internally or, where the building and its appearance allow, externally. The choice depends in particular on the condition of the façades, the space available inside the rooms, junctions with floors and the wall’s ability to manage moisture. Each solution affects internal floor area and thermal bridges differently.
Ground floor insulation
A floor above a cellar, crawl space or unheated room can be a vulnerable area. The technique depends on access from below, the type of floor and any existing services. In some older homes, the work must accommodate limited available height, pipework or uneven surfaces, all of which influence the method selected.
Windows and continuity of the envelope
Window replacement is not assessed separately from the surrounding walls. Reveals, lintels, shutter boxes and connections with adjoining surfaces must remain coherent in order to limit cold areas. In coastal locations, exposure to wind and rain also influences the choice of installation method, materials and weatherproofing measures.
Ventilation after improving airtightness
When several surfaces are treated, uncontrolled air leakage decreases. It is therefore necessary to ensure that air renewal relies on an organised system rather than on defects in the building. Wet rooms, airflow between rooms and existing extraction points are assessed to prevent a thermal improvement from creating ventilation imbalances.
Typical situations in Pas-de-Calais
Mining-era house with poorly insulated loft space
In a terraced home, the side walls are not always the main priority. The assessment may focus on the loft floor, rear façade, gable wall where present and junctions around openings. The aim is to treat genuinely exposed surfaces first rather than applying the same solution throughout the property.
House near the coast
In Calais, Boulogne-sur-Mer or a comparable coastal town, the condition of the façade must be checked before work is carried out on the walls. Signs of moisture, deteriorated joints or water ingress should not be enclosed behind internal lining. The chosen solution must take account of both outdoor exposure and indoor air renewal.
Rural property with several building volumes
An older house or converted building may combine thick walls, a more recent extension, a floor above a cellar and different types of roof construction. Insulation must then be considered area by area. Junctions between older and newer sections require particular attention to avoid creating significant discontinuities between treated and untreated surfaces.
Grants and funding
Depending on the nature of the work, the characteristics of the property and the conditions applying to the application, certain insulation works may qualify for MaPrimeRénov’, CEE (energy savings certificates), reduced VAT or the éco-PTZ (zero-interest eco-loan). Requirements vary between schemes and some grants require the use of an RGE-certified professional. Eligibility should therefore be checked before the work is finally approved.
To present your project and the areas you are considering treating, you can contact GRAM Énergie. The official rules, eligibility conditions and any requirements relating to the professionals carrying out the work can also be checked directly on France Rénov’ before making any commitment.
How we work
Identifying the surfaces
We assess the lofts, walls, floors, openings and junctions to identify the areas requiring more detailed examination.
Assessing the substrates
The type of materials, their condition, any moisture and access constraints are taken into account before selecting a technique.
Choosing the solutions
Methods are compared according to the layout of the rooms, the intended performance and compatibility with the building.
Treating continuity
Junctions around windows, floors, gable walls and changes in materials are included in the project to limit weak areas.
Checking ventilation
Air renewal is assessed so that a more airtight envelope remains compatible with everyday use of the property.
Our other services in Pas-de-Calais
You can complement your project with our pages on global energy renovation, heat pumps, thermodynamic water heaters and energy audits. You can also find the energy renovation in Pas-de-Calais page, the Hauts-de-France page, as well as local content for Calais and Boulogne-sur-Mer.
Frequently asked questions
Which areas should be insulated first in a mining-era house?
The answer depends on the actual condition of the building. In a terraced house, the loft, any gable wall, external façades and certain floors may be more vulnerable than walls shared with neighbouring properties. An initial assessment helps avoid treating surfaces uniformly when their levels of exposure differ.
Can a wall showing signs of moisture be insulated?
The source of the issue should first be identified. Water ingress, defective joints, condensation or rising damp do not require the same response. Installing lining directly without addressing the cause may conceal the problem. The substrate must therefore be assessed before choosing a material and installation method.
Is internal insulation suitable for brick houses?
It can be, but the choice depends on the composition of the wall, its exposure and the management of water vapour. Available thickness, junctions with floors and items fixed to the walls must also be anticipated. The solution therefore involves more than simply placing insulation against the brickwork.
Does ventilation need to be modified after insulation work?
A check is recommended when the building envelope becomes more airtight. Old air leaks should not be relied upon as a permanent ventilation system. Air inlets, extraction points and airflow between rooms must remain suitable for everyday use in order to limit condensation and remove moisture produced inside the home.
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.