Retaining Wall for Water? Why Not? January 5, 2010
To Pond or not to Pond, That is the question Novenber 16, 2009
Which Block is Right for Me? August 3, 2009
The importance of soil – July 16, 2009
Turn It Up By Turning Your Retaining Wall In – May 29, 2009
Find Peace and Tranquility in your Allan Block Water Feature – May 13, 2009
Finishing your Allan Block Wall with Style – April 23, 2009
Light up your Life – Adding Lighting to your Allan Block Retaining Wall - April 3, 2009
It’s Hip to be Square – When You Build with Allan Block Corners – March 26, 2009
Planning and Estimating your Segmental Retaining Wall – Feb 17, 2009
Do you want to build your own Segmental Retaining Wall? – Feb 11, 2009
Finishing Options for your Allan Block wall – Feb 9, 2009
Dirt Makes a Difference When Building a Retaining Wall – Feb 9, 2009
Don’t Come to the Party without the Right Tools! – Jan 22, 2009
Can I use a simple Gravity Wall? – Dec 12, 2008
Homeowner’s Hut FAQs
Hello,
A contractor is building a retaining wall using Allan Block but he is not filling the holes with crushed rocks. His reasoning is that he has poured concrete footing instead of rock base. Thus, the wall is just as strong w/o filling in the crushed rocks. Is this correct?
The house relies on the retaining walls to stay intact, therefore I want to make sure that it’ll work.
Thanks!
The base leveling pad and the wall rock within the Allan Block units are two separate entities. There are cases where a concrete leveling pad (made from low strength, unreinforced concrete) is used in place of the granular base shown in our installation instructions. The wall rock on the other hand is the rock within the block cores and a minimum of 1 foot behind the wall. The rock inside the cores is required to add weight to the block for a gravity wall. If this rock is omitted, there will not be enough weight here to resist the soil behind the wall. If geogrid reinforcement is used, this rock within the cores will be used to connect the geogrid to the wall facing. It is very important that this wall rock is installed with each course of block and compacted well. More installation information can be found in our AB Landscape Wall Guide.
Retaining walls should not be built upon muddy foundation soils, if at all possible. These soils should either be dried and compacted to the minimum compaction requirements (which is not always easy to do), or be removed and replaced with base rock. Your solution sounds reasonable, as long as you are sure to completely remove any unsuitable material from your trench. You can find more information regarding preparing your gravel base on our website at http://www.allanblock.com/retainingwalls/Installation/Landscape/build/basicinst.aspx?ta=1&product=rt
I am interested to buy the following:
- 1 roll of AB reinforcement grid 4ft wide x 50ft long: Part#:HSF151520 B004
I would greatly appreciate your feedback with information on AB sale point location in Vancouver, British Columbia.
Thank you,
Rudy
Thank you for you interest in the AB reinforcement grid. You will need to contact our local manufacturer in the Vancouver area. Please call CCI Industries at 1-800-556-9733 or email them at info@cci-industries.com
I have dug the trench to the recommended depth for a 3 foot tall (5 courses of 8 inch tall block, 1 underground) retaining wall, and the trench is sloped to daylight, effectively draining surface water that runs into it during rain. The bottom of the trench is all mud however due to seepage of water from the base of the hill that the wall will retain. (The mud remains even after several days of dry weather.) The soil is very sticky yellow clay.
I have some granular fill material on site, some fairly clean sand/gravel and a pile of fairly dirty rock/sand\ gravel. Should I dig the trench deeper (I was thinking maybe an additional 12 inches), fill with granular material and compact before adding washed rock for the wall base. I also have some concrete rubble available. Could/should I put the rubble in bottom 12 inches of the trench to help reinforce it?
I have read in at least one of your publications that muddy base soils should be amended but no further details were provided
Thanks for any help you can provide.
I want to build a 3 foot high separation wall, not retaining, and want both sides to have a nice finish appearance. It is a separation from a patio to the yard, all at the same elevation. I would like the wall to be flush vertical both sides. Do these block have the capacity for a finished look both sides and be flush vertically?
Allan Block Courtyard Product is the perfect solution for your application. Installation instructions for various projects are available on Allan Blocks Website. There you can estimate your project, watch AB Courtyard Installation Videos or read the How To instructions for various projects. You can also find where to buy the product and how to get help with installation instructions and ideas.