Questions tagged [retaining-wall]

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7
votes
5answers
2k views

Setting fence post in gravel/backfill?

I am attempting to build a privacy fence that will sit just behind a retaining wall (as in, on the ground behind the wall and not on the wall itself). While digging today I realized that while the ...
7
votes
1answer
561 views

My yard is eroding away and taking my house with it: what's the cheapest way to build a retaining wall to stop it?

We can't get grass to grow in spots in our backyard due to a combination of dogs, trees, and shade. Behind the house is a hill. A third of it has a retaining wall built with rail road ties. It has ...
5
votes
4answers
1k views

What Kind of Wooden Beam is this

My wife and I recently purchased our first home. We'd like to make a flattened area in our backyard (which is somewhat sloped) for a firepit. My thinking was to dig out a shallow area and fill it with ...
5
votes
1answer
68 views

How can I level and secure retaining wall steps?

We have some retaining wall steps that are in dire need of repair. We would like to re-level some of them and re-adhere all of the cap stones so they no longer rock. Is it possible to create a ...
4
votes
3answers
936 views

How to make a Tall Retaining Wall

Recently, as in September [Final close date was 11/13/2015] this year, I bought a house. This house is on an extreme incline. I would like to level out this incline. The front first floor of the ...
4
votes
2answers
614 views

Building a free-standing wall on top of a retaining wall

My house is well below street level. The slope from the sidewalk down towards the house is visibly eroding, to the point where I can see the entire side of many of the sidewalk slabs. The yard looks ...
4
votes
2answers
9k views

Can a retaining wall follow a slope?

We've got a 50' stretch of yard that has a very gentle side to side slope that we can't easily eliminate (fences on each side built at different heights). We want to build a retaining wall along that ...
4
votes
1answer
896 views

Are railroad ties suitable for a retaining wall under tree canopy?

This video shows a sharp cliff near my house that leads down to a stream. The drop is about 20 feet. I would like to build a 4' high retaining wall right around where you see a stack of dead branches. ...
3
votes
2answers
14k views

My timber retaining wall is tipping over

My timber retaining wall is falling over, I'm just wondering what my options are? Is there a way to fix what I've got, or will I need to dig this whole area out and rebuild? You can't tell from the ...
3
votes
2answers
157 views

How to saw inground lumber

My townhouse has some outdoor stairs built out of 6" x 8" lumber. A couple of the steps are rotten and I need to change the lumber. There is also a perpendicular long piece of lumber that crosses ...
3
votes
3answers
4k views

Should a 3'-4' retaining wall have interlocking blocks?

I'm building a 3'-4' retaining wall in my backyard and I'm in the process of choosing block. One of the blocks I like isn't engineered with any kind of lip or interlocking feature. Is this necessary ...
3
votes
5answers
76k views

Retaining wall: footing or no footing?

I'm looking to build a retaining wall on my sloped backyard. I'll be using cinder blocks (with mortar to join them together and rebar for added stability). (added info: at the lowest point the wall ...
3
votes
2answers
1k views

How to dig out behind retaining wall?

I'm looking to extend an existing water line. The only problem being that I need it to go under an existing retaining wall. I've included a quick side sketch just to get an idea of what I mean. The ...
3
votes
1answer
1k views

How to fix a retaining wall that is difficult to access behind the house?

My retaining wall needs to be fixed/rebuilt since it's leaning, but I can't get any machines back there because house doesn't have much side or rear setback(maybe 5ft on each side) and behind the ...
3
votes
2answers
3k views

How do I compact backfill behind a retaining wall under a driveway?

I have a retaining wall that is on the property line. Along the top of the wall is my driveway. Part of the wall has given way and needs to be rebuilt. I think I have everything figured out except how ...
3
votes
2answers
13k views

Can I build a 28" retaining wall using blocks with no lip?

I am building a wall that is 10.5' long and 28" high. There will also be side walls sloping down from both corners to enclose a patio. I would like to use blocks that are 15" wide, 5" tall and 8" deep,...
3
votes
1answer
533 views

Can solid offset blocks be used to build a retaining wall in excess of 5'?

We need to build a retaining wall near our pool area. We have not made final decisions on it, but it will be a minimum of 4' tall, and possibly 5' or more. Many online tutorials recommend solid ...
3
votes
2answers
22k views

How can I prevent this concrete block wall from falling over?

I have a concrete wall that separates my backyard with my neighbor’s. It has been there for decades (at the very least 30 years). I have a slope of about 30 degrees and have noticed that the wall is ...
3
votes
1answer
17k views

Can I build a retaining wall along an existing fence?

Our yard has a small slope to it, and we wanted to make it level. (Mainly so we can put a swing set in for our kids.) I was thinking I could build a small retaining wall and just fill it in, but would ...
2
votes
1answer
647 views

Does anyone know if concrete blocks with half-moon tops are made?

I'm planning to finish a concrete block fence and would like to cap it with a rounded half-moon style block for aesthetics (the whole thing will be covered with surface-bonding cement for an adobe-ish ...
2
votes
2answers
57 views

How best to repair a cavity in the base of a retaining wall

I'm looking for some pointers on how best to go about repairing a hole and cavity in slate wall. The wall is the retaining wall at the rear of a house. Above and behind the wall there is a garden. The ...
2
votes
1answer
3k views

Maximum retaining wall height

Some retaining walls from the home improvement store stated that Maximum Wall Height is 2 feet. For example, Tranquil Olde Manor Concrete Retaining Wall Block from Lowes. My question is that why there ...
2
votes
2answers
49 views

Why don't segmental retaining walls need any piers or anchoring below grade?

I have built two soldier pile retaining walls (where you slot the boards between I-Beams you sink into the ground) with good success - but that success was due to: sinking the piles at least their ...
2
votes
2answers
681 views

What's the best way to get grade below foundation wall?

We just discovered that the cause of some water staining on the internal sill-plates on top of the basement foundation wall are due to the outside grade sitting ~2 inches above the foundation wall!! ...
2
votes
2answers
932 views

Can I fill cinder blocks with soil/dirt?

I have two short raised beds made of cinder blocks (8 in. and 16 in. tall) that isn't finished yet. I was wondering if it's okay to fill the voids of the blocks with excess soil from my yard? I live ...
2
votes
1answer
3k views

How much base is needed for small retaining wall?

Using crestone blocks 3.5 inches tall by 11.5 w and 7.5 deep. I will be doing two levels plus caps. What base depth should base material be? I know base brick should sit 1 inch deep for every 8 inches ...
2
votes
2answers
897 views

Using a boulder wall as an 8' retaining wall (Dallas area)

I've got an 8' retaining wall, runs about 120' across the back of my property (faces my house). It's railroad ties and has about run its life. I'm looking to replace with some kind of stone/block ...
2
votes
0answers
760 views

Compact drainage rock behind retaining wall?

I am confused by the mfg instructions and its images. It states to fill core and 12 inches back with drainage crushed rock, and to compact, "backfill" First, what type of rick can i use for drainage ...
1
vote
2answers
90 views

Concrete retaining wall with lean and crack, looking for input

We bought our 100 year old house “as-is” a year ago with various small cracks and a firm, but somewhat eroded foundation. This all needs to be addressed eventually, however, a large crack with ...
1
vote
2answers
134 views

How do I build a fence with zero experience?

I've never built a fence or have never done any outdoor construction. I'm pretty handy and do most of my interior maintenance. I have a total of 780 feet where I need to put up a fence. I'm still ...
1
vote
4answers
7k views

How do I take apart a wooden retaining wall?

I have a retaining wall, sorta. It acts as a divider between homes rather than retain anything. Built the same way as one, with 6x6 boards, spikes, all that jazz. No deadmen, of course. I need to ...
1
vote
2answers
660 views

Check retaining wall drawing

Wondering if I can have people's thoughts on this retaining wall I'm building. It's a mortared CMU wall with rebar 24" o.c. It's on a slope and it will have a concrete slab and a fence right above the ...
1
vote
1answer
956 views

Can I use Mason Sand under Pavers?

I put an inch layer of mason sand down over a compacted base of process, and am about to lay large concrete pavers (18"x18", 12"x18", and 9" square) down. Now I'm reading that I should have used ...
1
vote
1answer
822 views

Can a concrete block be split the same way you cut stone?

I just bought a house with a large retaining wall built out of stackable concrete blocks. At one intersection there's an extra block that sticks out awkwardly. If I score a line with a chisel can I ...
1
vote
1answer
90 views

Retaining wall repair and conversion to tiers

I've got a retaining wall made from 6"x6" timber that is falling in. It would appear that when it was built there was no backfill and now the wood is rotting. Unfortunately, it's supporting part of ...
1
vote
1answer
214 views

What can I use to build a short retaining wall for a patio extension?

We want to extend our patio that is currently about 10 x 5 feet to about 10 x 10 feet. Problem is there is a slope where the current patio ends. The next 5 feet has an approx. 1 foot deep slope. ...
1
vote
1answer
48 views

What should I do about this bowing foundation wall?

I'm currently in the process of buying my first home, and I found a property on the market that was priced significantly less than most homes in the area. The seller's justification for this was a ...
1
vote
1answer
31 views

Foundation for retaining wall on a hardcore base?

I'm looking to build a retaining wall 800mm (2.5ft) high and 225mm wide at the side of my house. During the original construction groundworks, the ground around my house had to be raised up about ...
1
vote
1answer
366 views

How do I protect the front side of a wood retaining wall?

I have a wood retaining wall made of 3x12 pressure-treated boards similar to the one pictured here. The backside has MiraDrain and 3/4" drainage rock. I have an excess of earth to manage and one ...
1
vote
1answer
83 views

Gabion cage retaining walls: drainage and deadman needs?

I'm having some difficulty finding information about gabion retaining wall construction. We're building a 2' high gabion cage wall to hold back 2' of flat topsoil backfill. There are two aspects I ...
1
vote
3answers
139 views

Fencing backyard on the lower side of a retaining wall

Trying to fence my backyard, so that the dog has some room to play and burn some energy, as well as joining us outside during gatherings. My backyard sits on the low side of a retaining wall, which ...
1
vote
1answer
316 views

How curved is a horizontal string line? [closed]

I plan to build a raised planter from 2 courses of concrete blocks. The long dimension is about 9 meters. I staked the corners, and then stretched a string the entire length as taut as I could without ...
1
vote
1answer
102 views

Options to keep soil in split-grade backyard [closed]

All of the houses in our neighbourhood have a "naturally" sloping backyard, which slopes downwards from the house. The spread is about 6-8" over 15-20 feet depending on the yard. Neighbours on both ...
1
vote
1answer
86 views

What should be done about this concrete retaining wall?

At the back of my property there's a concrete retaining wall that separates my back yard from my neighbor's. The wall has several enormous cracks and is leaning, especially toward one side. I'd guess ...
1
vote
2answers
858 views

Gabion walls as retaining walls?

There's a lot of information about DIY gabion walls, but none of the applications that I've seen on YouTube and elsewhere talk about gabion walls as retaining walls. I would imagine that a gabion wall ...
1
vote
1answer
74 views

Pool bonding, retaining wall in the way

I currently have an 24ft intex Pool. I know it doesn't have to be bonded but while the yard is torn up I am thinking it may be a good idea to run the bond wire now for when I upgrade the pool to a ...
1
vote
2answers
93 views

Do I need to treat the ends of PT lumber?

I'm going to be building a retaining box for a gravel pad using 6x6's - 0.16 lb./cu. ft. MCA pressure treated lumber. The dimensions of the box matched up with available lengths at the lumber yard, so ...
1
vote
1answer
2k views

How to finish retaining wall for a paver patio on a sloping ground?

Hi All: I am building a paver patio in my backyard (primarily so that kids can use it for playing). I need some advise on the best way to do it. The size of the patio would be large: 26ft by 18ft. My ...
1
vote
1answer
976 views

Best way to cover stair using concrete retaining wall block

I have spent 3 days creating this stair and I still don't like to look. The reason is that I have tons of those retaining wall blocks so I have to use them all to create the stair. The first try was ...
1
vote
1answer
66 views

How can I fit an oversize retaining wall base adjacent to sidewalk?

I'm going to build a small retaining wall (about 3' tall) along the sidewalk in front of my house using Versa-lok standard blocks. They recommend compacted gravel base about 18" deep for blocks that ...