| There are three
ways to build a retaining
that have been proved over time to work and survive lots of freezing and thawing!
MUST be built with oak, NOT pressure treated lumber. Pressure
contains toxic materials which can damage fish etc.
Netting is MOST important to prevent wave action from erroding behind the wall.
Looks nice. Uniform height.
Don’t use limestone, it breaks up from freezing.
Most contractors have broken concrete they are willing to
free, but get it without re-inforcing rods.
Labor intensive to install
This construction is essentially the same as that for broken concrete.
Easy to stack.
Heavy to install.
HOW TO BUILD
Some lots had earth removed in front of the banks using a back-hoe. This created a "ditch" which fills up with silt. If this is your situation, you need to remove as much silt as possible, then fill the trench with compacted shot rock to create a level and stable foundation.
If your shore line is firm, you can build directly on the un-disturbed base.
1. Deposit shot rock and compact if there is a trench
in front of the
2. Place first layer of 6 x 6 oak.
3. Drill holes and drive 5ft spikes (½" concrete re-bar) every 6ft of length.
4. Lay additional layer. Each secured by 8" nails.
5. Tie-backs, 8ft by 6" x 6" must be used at 10ft intervals. These are secured by spikes. These stop the wall from tilting forward.
6. Place garden netting behind the wall This is the weed preventing roll material. Fiber glass preferred. Otherwise fine woven plastic. Water driven under wave action squirts between the features of the wall and erodes the earth behind it. This screen prevents that from occurring.
7. Small pebbles are essential behind the screen. These MUST extend above the lake level.
8. Place large rocks against the lake-side face of the wall up to the lake level.
9. Decking is optional.
1. Establish a firm base. If there is a trench or
silt, scoop out and
deposit shot rock.
2. If the lake floor is firm. Place the first line of broken concrete. These should be large pieces at least 2 x 1ft . Place at an angle towards the bank at 15°.
3. Continue stacking and inter-locking.
4. Place netting behind the wall.
5. Back fill with small stones or gravel. These must extend above the lake level.