Home » Roads and yard areas

ROADS AND YARD AREAS

Frost insulation and frost insulated pavement is used to minimize the thermal loss in freezing subgrade over winter to ensure that the frost heave remains within permissible limits. Preventing frost heave through insulation is always more cost-effective than soil replacement. Frost insulation is also the better option in terms of the carbon footprint. Most importantly, FINNFOAM insulation will guarantee the longevity of structures.

*When used for frost insulation in infrastructure construction, FINNFOAM is highly resistant to loading during the operation of the worksite.*

The enclosed table presents examples of the maximum values of frost heave and pitch change. Drainage structures and pipelines as well as the entrance points of buildings, for example, may require more stringent limits with regard to the permissible frost heave compared to the rest of the yard area.

Yard surfacing	Grade	Design freezing index Fmit	Permissible frost heave hsal mm
Asphalt or concrete surfacing	1	F10	50
	2	F10	100
	3	–	Unlimited
Gravel or crushed aggregate surfacing	1	F10	50
	2	F10	100
	3	–	Unlimited
Stone or tile surfacing	1	F10	50
	2	F10	100
	3	F10	150

*In a yard area with traffic, FINNFOAM is covered with approx.* *150–300 mm of sand depending on the load.*

*By frost insulating the structure, you can save on soil replacement.*

GRADES

Grade 1:
Yards or areas for which particularly significant appearance or functionality requirements have been specified.

Grade 2:
Yards of residential, commercial, and office buildings or similar

Grade 3:
Such yards of warehouse, industrial, and other such buildings and similar areas for which appearance or functionality requirements that are lower than for grade 2 are acceptable.

You can find brief instructions for frost insulating roads and streets below:

The design calculations for the surfacing layer of yard areas with regard to frost heave must be completed case-specifically, based on field and/or laboratory testing. If the source information mentioned above is not available, the design recommendation provided below may be used in the design of surfacing.

*Frost insulation of an old street is the most cost-effective reconstruction method.*

*The underside of a flat slab should always be insulated to ensure long-term functionality.*

SUBGRADE WITH MEDIUM SUSCEPTIBILITY TO FREEZING

SUBGRADE WITH HIGH SUSCEPTIBILITY TO FREEZING

The thickness of thermal insulation D for frost protected surfacing based on the freezing index with different permissible frost heaves if the subgrade has medium susceptibility to freezing.

The thickness of thermal insulation D for frost protected surfacing based on the freezing index with different permissible frost heaves if the subgrade has high susceptibility to freezing.