Permafrost degradation – Get prepared
How to prepare for permafrost degradation
Your home may be at risk of structural problems if it is built on soils, especially those with fine materials such as silts and clays. Bedrock usually provides a stable foundation, whereas soils with silts and clays often contain a lot of ice and are vulnerable to permafrost degradation. Soils with well-drained coarser material like sands and gravels are generally less vulnerable to permafrost degradation than soils with fine materials. Wet ground and poor drainage may indicate the presence of silt or clay. A foundation that accommodates thaw, such as an adjustable foundation or piles driven deep into the ground can help reduce the effects of thawing permafrost.
Prepare your home
You can do things that reduce thaw by keeping the area under and around the building as cold as possible.
Around your home
Take actions around your home to prevent or slow the thaw of permafrost.
- Keep snow cleared so it does not insulate the ground
- Shade south sides of buildings
- Promote airflow under buildings in winter by keeping the area under and beside buildings clear and removing snow drifts
- Limit removal of natural vegetation and use mulch to reduce warming of the ground in the summer
- Ensure water does not accumulate near your home by directing draining away and removing snow piles
Inspect your foundation
Inspect the foundation and interior and exterior of the build and watch for:
- cracks in drywall
- sticky doors and windows
- cracks in foundation
- settlement and heaving of buildings
- floors or roof lines out of true
If you have an adjustable foundation, you can level your house as required. Help from experts may be required if there are serious issues.
Learn more about permafrost in Canada’s north
Explore these resources for homeowners to learn more about permafrost degradation: