Largest surface, easiest access
In a cold loft the insulation can be laid on top of the existing layer without tearing anything out. Few measures cost so little per square metre.
All energy measures
Building envelope
Insulating the roof and loft
Warm air rises, and the roof is the surface that is easiest to reach in most houses. That makes the loft the place where each krone usually returns the most.
See what this means for your homeThis measure is relevant if
- The loft is cold and unconverted, with easy access
- The insulation is thinner than 20 cm, or has settled
- Icicles form on the gutters in winter
- You want to do one measure first and see the effect
What it does to energy use
Icicles are a warning
Icicles form when heat escapes and melts snow that refreezes at the eaves. They are a visible sign of heat loss.
The ventilation gap must stay open
Insulation pushed right out to the eaves blocks the air gap. The loft then turns damp, and you have swapped a heat problem for a moisture problem.
The vapour barrier decides
Without a sealed vapour barrier, humid indoor air is carried up into the insulation and condenses where it is cold.
Sequence matters
The loft is the natural first measure on the building envelope, both because it is the cheapest and because it can be done without demolition. Take it before sizing the heat source — everything you do to the roof reduces the demand the pump has to cover.
Enova funding
Insulating the roof and loft is among the measures Enova funds. How much you can receive depends on the area and the U-value the structure ends up at.
Rates and terms change. What you can receive depends on the building, how the work is carried out and which schemes apply at the time. Always check Enova's own pages before relying on a figure.
The rates tell you what you can receive. The calculation tells you what the measure actually does to your home — how much it saves, what it costs, and whether it should come before or after the others.
Which measures pay off in your home?
Enter the address. Gadder collects what is known about the building, calculates the energy demand and ranks the measures by what they actually deliver.