Built for a Vermont Freeze, Not a Catalog Photo

What we build in Vermont

Vermont jobs start with what the ground does to a structure. That is why retaining walls and gravel driveways are the work we plan first. The wall has to hold a slope that freezes, and the driveway has to shed spring melt without rutting. Around the house, the work is about keeping the frost out of your foundations, your dooryard, and your walkout.

• Paver patios for the three-season porch and the back dooryard
• Walkways and steps that connect the mudroom entry to the drive
• Paver driveways where crushed gravel is not the look you want
• Grading and drainage to move water away before it freezes
• Outdoor kitchens and fire pits for the short season you get

From first call to walkthrough

The season window sets the calendar. Excavation and base work run from roughly May to October, so a written price comes first and a start date comes second. Mud season slows the start, and frozen ground stops compaction in winter, which is why the schedule locks early.

You get the written price before any date is set. The process is laid out so you know what the crew does each day and what you need to be present for. You are there for the excavation, for the base compaction, and for the final walkthrough. The cost guide explains what drives the number before you commit.

The cost drivers here

Deep frost, rock in the dig, and the shortest season in New England set the cost. The ground is glacial till with boulders and ledge across most of the state, clay in the Champlain Valley, and sand and gravel in the river valleys. That mix means every excavation is a guess until the bucket hits it.

The season also matters. Work that runs from May to October has a tighter window, so scheduling is less flexible. Slate and fieldstone are local, which helps on material, but the labor to place them does not change.

Why Vermont ground lifts what sits on it

Frost does not push down. It lifts up. When water in the soil freezes, it expands and forms ice lenses that raise the ground above them. A slab or a wall built too shallow sits on soil that moves, and the structure moves with it. That is how a patio heaves, a walkway cracks, and a retaining wall goes out of plumb.

The frost depth is not uniform. About 48 inches is the working number in Burlington and the Champlain Valley and across the south toward Brattleboro. In the Northeast Kingdom, the number climbs to 60 inches or more. A wall in Rutland and a wall in the Northeast Kingdom are not the same build, because the ground under them freezes to different depths.

The fix is not more concrete. It is digging past the frost line and placing a base that does not hold water. Crushed gravel drains, so it does not freeze into a solid block that lifts. That is the difference between a structure that settles and one that heaves.

Building for 48 inches of frost

Every build decision starts with the frost depth. A footing or a wall base goes below 48 inches in the Champlain Valley and the south, and deeper where the frost note says 60 or more. The base is crushed gravel, specified under VTrans Item 704, which is how material is named at the yard. It is compacted in lifts so it locks together and drains.

Water is the second problem. A wall gets free-draining backfill and drainage behind it, so water never sits in the frozen zone. A patio gets a crushed gravel base that sheds water sideways instead of trapping it. Taller walls get geogrid, tied back into the slope so the wall and the soil behind it move as one.

The soil condition drives the excavation. Glacial till with boulders and ledge means the dig is slow and unpredictable. Clay in the Champlain Valley holds water, so it needs more attention to drainage. Sand and gravel in the river valleys compact well but need the right base depth. The season window, from roughly May to October, is when that work can happen, because frozen ground will not compact.