All posts tagged retaining wall

Retaining Walls | Whitney Street – Glenn Park

Whitney Street Project

Glen Park Neighborhood

Glen Park, a wonderful neighborhood in San Francisco, could provide an entire semester of architectural material if you took the time to walk up and down the hilly streets. Spanish Colonial houses sit side-by-side with Mediterranean Revival homes, which butt up against homes built in Mission Revival style. It’s an interesting place with an interesting history, which was one of the reasons we were happy to take on a landscaping, garage stuccoing and retaining wall project on Whitney Street.

When we were called out for this project at the beginning of 2015, we were told that the client wanted a drastic change in improving curb appeal. We knew we had to keep the charm of the landscape consistent with the charm of the home. For a house on Whitney Street, full of 85-year-old (and older) homes, this is no small accomplishment. Although the home is modest, the front really makes it stand out from the dwellings on the street.

Another challenge was stuccoing the equally old garage and adjoining retaining wall in a way that would keep the stucco looking fresh and in one piece a few years down the road. Thanks to four years of little rain in the Bay area combined with San Francisco hillsides, stucco has a tendency to crack, and retaining walls can shift. Obviously, we don’t want either of those to happen.

We started as almost every landscaping project starts – with a little demolition, watched over by my work dog, Dukey:

Dukey Dog

Once all the old was out of the way, we could start the real work of beautifying the front of the home. Although a retaining wall was part of it, we also replaced the stairs and patio, add added a deck to the garage. We poured a new slab for the patio garden, built new stairs for the front porch and for the new deck over the garage.

Pouring New Slab

Bison Decking System

For the deck over the garage, we used the Bison Deck System, which ensures a smooth, even foundation for the wood tiles. This also provides a level step, rather than dipping and swaying when people walk on it.

We also installed new steps of black limestone and black slate. At night, the steps are lit by wall lights with a solid brass face plate. As always, we used FX Luminaire 12-volt lighting fixtures to illuminate the garden/front. FX Luminaire has always provided excellent products for landscape lighting.

Steps and Wall

Limestone Steps

To ensure the stucco on the retaining wall and garage doesn’t crack under the dry heat, we fortified it with metal lathe. Next is the process of applying the stucco, starting with a scratch coat.

Coat_4_stucco

As a final touch, we added custom iron fencing to the retaining wall, deck and stairs. This not only helped keep the style of the home, but also to set it apart from its neighbors.

Gate in Iron

Iron Work Steps

The Finished Project

We were really pleased with the final results. Within three weeks, we’d designed, installed and finished a flattering front entrance for the client. Tamate Landscaping did all the carpentry, electrical and stucco, which kept the price lower than if we’d had to go to outside contractors.

As well, we used an ironworker with long ties to the company to provide custom iron fabrication and installation.
Whitney Street Project

It was quite a job, but I think it’s one for the “well done” books.

 

Complete Projects: Retaining Wall in Buena Vista

February 13, 2013:

This project brings us to the Buena Vista neighborhood in San Francisco.  We’ll be replacing this wall with something much stronger.   A concrete wall is of course the most durable lasting 80 plus years but if budget is a factor, pressure treated (PT) timber is the way to go. But not all PT walls are constructed equally as you can see.  With the support post being the weakest link, failure occurs here in most instances.  Specifically, either the post rots out or the concrete footing will start destabilizing due insufficient depth and girth.

 

Tamate Landscaping - Old Retaining Wall

Day 1, old wall is removed and area excavated.

Tamate Landscaping - Old Retaining Wall Removal

So how do you make a standard pressure treated 15 plus year wall into a 30 plus year wall?  More concrete and substitute pressure treated posts with steel I-beams.  Here you see the steel post dropped into a hole 4′ deep by 2′ wide.  1/2 cubic yard of concrete will secure the post for a very long time.

Tamate Landscaping - Steel Support Beams for Retaining wall

Tamate Landscaping - Steel Support Beams for Retaining wall

Tamate Landscaping - Steel Support Beams for Retaining wall

As we excavate the post holes, soil is loaded onto the trailer for dumping and concrete mix brought up.

Tamate Landscaping - Soil and Concrete Loading

All with five gallon buckets.  A typical San Francisco project due to limited access.

Tamate Landscaping - Soil and Concrete Loading by Bucket

End of Day 3.

Tamate Landscaping - Support Structure for Retaining Wall

One very important process when working with pressure treated lumber is to seal all ends that have been cut.  When pressure treated material is manufactured, the chemical that protects it from rot, termites etc. is only injected about 20 percent into the surface ,at best.  Any cuts would leave that area open to intrusion of the elements.  Here we use “copper green” to seal it up.

Mira Drain.

Project Complete: February 2013, Buena Vista, San Francisco California.