Littleton Retaining Wall Contractors

Almost nobody calls us about a brand new wall on bare ground. They call about the one that came with the house. A row of creosote timbers holding back the side yard, spiked together during the Carter administration and now soft enough to push a thumb into. A stack of boulders dry-set to make a garden bed, quietly walking downhill an inch a year. Builder block along the back of the lot that looked fine at closing and looks less fine now.

Littleton has plenty of that, because it has plenty of slope and several distinct waves of building. Our job is usually sorting out which inherited wall is a real structure that aged out, which was never a structure at all, and which slope would be better off with no wall in it.

The walls this town already has

Through the older streets around Columbine and Southbridge, the standard fix decades ago was timber. Ties, spikes, a few deadmen buried into the hill if the builder was conscientious. Those walls did decent work for a long time and they're all at the end of it now. Wood rots from the buried face outward, so a tie wall looks fine right up until it doesn't.

Out toward Ken Caryl the walls do harder duty. Those lots were carved into slope, so the flat ground exists only because something holds dirt back, and losing a wall means losing the driveway or patio above it. Different problem, different budget, and usually an engineered structure rather than landscaping. Newer ground near Highland Walk and The Hills at Piney Creek brings segmental block along the grade breaks between lots. Some of it went in with proper reinforcement. Some got stacked to a height it never should have reached.

What we find when an old wall comes out

Pressure and water do all the damage

A wall fights one thing: dirt trying to slump into the flat space you made. That push grows with height, and it grows hard when the soil behind gets wet, since saturated clay is heavier and stacks water pressure on top of soil pressure. Wet backfill can multiply the load several times over. Which is why walls here pick the March thaw to fail, not the July heat.

The wall is half the job. Behind it goes clean free-draining rock wrapped in filter fabric, perforated pipe running to daylight, and weeps through the face so trapped water has an exit. Segmental walls get geogrid, a stiff mesh laid between courses and reaching back into the fill, which turns the block and a wedge of soil into one heavy mass. We also batter the face into the hill slightly, because a wall leaning in has a long way to go before it looks like it's leaning out.

What goes in behind the wall before any dirt does

• Footing carried below frost depth and bearing on undisturbed soil
• Filter fabric separating the drain rock from the native clay
• Angular free-draining rock, not the clay that came out of the cut
• Perforated pipe at the base, sloped to daylight or a catch point
• Weep holes through the face at regular spacing along the wall
• Geogrid layers at the depths and elevations the engineer specifies
• Backfill placed in shallow lifts and compacted, never dumped in one push
• Finish grade above the wall shaped to shed water away, not toward the face

The season for wall work

Late spring through early fall is the window, for a practical reason beyond comfort. Wall building is mostly earthwork, and earthwork wants ground that's neither saturated nor frozen. Compaction is the whole game back there, and nobody compacts frozen clumps or soup. Both leave voids that surface as settlement a year later.

Fall is our favorite stretch: dry soil and a finished wall standing before the wet season. Winter work happens on smaller jobs when the ground stays workable, with cold weather protection on the concrete and backfill scheduled into a thaw window. What we won't do is race a freeze and shove frozen material behind a new wall. If the calendar gets tight we'd rather secure the site and finish the backfill properly in spring.