2.1.6 Adding or increasing internal insulation in roofs
Description
The insulation from the inside is achieved by insulating the roof of the building or the ceiling of the upper housing in case it is a multi-family building. It is a simple execution and it allows the use of thermal insulation materials of lower quality and lower cost than in the external insulation.
Benefits
Prevent the lifting of the external roof (tiles or pavement), waterproofing, etc.
It enables the retrofitting from the aesthetic point of view of the inside of the building
Especially suitable when it is not necessary to carry out works of waterproofing or modification of the external roof of the building
It is especially suitable to insulate on the inside when the buildings are not of permanent occupation. It is the typical case of a weekend house
In the case of buildings with a degree of protection as part of the historical and artistic heritage, working on the inside will be the only option to execute the work of retrofitting.
Limitations
The thermal insulation is out of the building envelope corresponding to the roof
There is no elimination of thermal bridges
Interstitial and superficial condensation of each construction should be checked individually and decide, case by case, the installation of a vapour barrier
Economic assessment
Initial investment: around 15 €/m2
Payback: around 2 years
References and best practices
Dwelling renovation and spatial quality – The impact of the dwelling renovation on spatial quality determinants: www.sciencedirect.com/science/article/pii/S2212609015000023
Rigid foam polyurethane (PU) derived from castor oil (Ricinus communis) for thermal insulation in roof systems: www.sciencedirect.com/science/article/pii/S2095263512000696
CHARACTERIZATION
Environment or playable world:
Residential
Academic
Offices
All
Carried out by:
Public building users
Owners
Operators
All
Reduce consumption of:
Heating
Cooling
DHW
Lighting
Electric devices
Type of driver:
Physical environmental
Contextual
Psychological
Physiological
Social
Time framework:
- Short term
- Long term
Type of measure:
- Envelope
- HVAC
- DHW
- Lighting
- Electrical devices
- Other