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This is the Operation and Maintenance (O&M) manual for [[CCAT project name]]. Please refer to it and keep it up to date with any O&M changes. | This is the Operation and Maintenance (O&M) manual for [[CCAT project name]]. Please refer to it and keep it up to date with any O&M changes. | ||
== | == Summary == | ||
The CCAT Greenshed Cob Wall was constructed using cob (a combination of water, clay, sand and straw), recycled glass, and a cob and lime plaster. Eighteen ‘liters of light’ were made from recycled glass bottles. A granite slab shelf inside the shed sits below a glass plate window. The cob wall is a frameless single mass, and was selected for the south wall of the Greenshed because of its high thermal mass capacity. Well built cob walls are known to be incredibly long lasting, but are prone to rotting in a wet climate such as Humboldt County’s if they are not allowed to ‘breathe’ and are not protected from the rain. | |||
== Maintenance == | == Maintenance == | ||
The Greenshed’s roof overhang provides an effective amount of protection from the rain, but humidity levels may start to cause the plaster to deteriorate overtime. Settling or earthquakes may cause more distinct faults in the cob. Minor cracks in the walls do not pose a serious threat to the structural integrity of the structure. They are best left alone unless they begin to widen and deepen. Larger faults still may not cause serious threat to the wall, but are better off repaired with a patch. In the event that cracks or faults begin to worsen, keep in mind that the cob wall needs to breathe. Refrain from making repairs with a plaster made with cement. Cement plasters tend to be less hygroscopic (able to take on and give off amounts of water vapor in response to humidity changes) and less flexible. | |||
'''NEVER''' try to fix a leaning wall using a hydraulic or leveraging system. If a lean in the cob wall begins to approach an unsafe limit, the best mode of action is carefully dismantling the wall and rebuilding. | |||
=== STITCHING FOR A CRACK OR FISSURE === | |||
Create a ‘stitch’ across a crack or fissure by using an earthen or lime plaster. A lime plaster is recommended over an earthen plaster for repairs because it reduces shrinking by 50%. If the crack is too small to bother with a cob fill, but too large to simply cover with plaster, you may fill the crack with dry straw and then plaster over. | |||
=== FILL & PATCH FOR A FAULT OR CAVITY === | |||
To create a ‘fill and patch’ for a fault or cavity, it is important to create a mechanism for the old cob to attach itself to the new cob. | |||
#Insert oak pegs or galvanized slab nails at random points inside of the cavity. If the cavity is not large enough to insert the pegs, carefully chip away at the outside surfaces of the cavity until the pegs can be inserted. | |||
#Create enough cob mix as similar to the original mix as possible to fill the cavity | |||
#Carefully ram the cob mix into the cavity | |||
#Allow to dry | |||
#Apply a lime or earthen plaster to the exposed dry cob | |||
=== Schedule === | === Schedule === | ||
Revision as of 21:19, 22 April 2014
This is the Operation and Maintenance (O&M) manual for CCAT project name. Please refer to it and keep it up to date with any O&M changes.
Summary
The CCAT Greenshed Cob Wall was constructed using cob (a combination of water, clay, sand and straw), recycled glass, and a cob and lime plaster. Eighteen ‘liters of light’ were made from recycled glass bottles. A granite slab shelf inside the shed sits below a glass plate window. The cob wall is a frameless single mass, and was selected for the south wall of the Greenshed because of its high thermal mass capacity. Well built cob walls are known to be incredibly long lasting, but are prone to rotting in a wet climate such as Humboldt County’s if they are not allowed to ‘breathe’ and are not protected from the rain.
Maintenance
The Greenshed’s roof overhang provides an effective amount of protection from the rain, but humidity levels may start to cause the plaster to deteriorate overtime. Settling or earthquakes may cause more distinct faults in the cob. Minor cracks in the walls do not pose a serious threat to the structural integrity of the structure. They are best left alone unless they begin to widen and deepen. Larger faults still may not cause serious threat to the wall, but are better off repaired with a patch. In the event that cracks or faults begin to worsen, keep in mind that the cob wall needs to breathe. Refrain from making repairs with a plaster made with cement. Cement plasters tend to be less hygroscopic (able to take on and give off amounts of water vapor in response to humidity changes) and less flexible.
NEVER try to fix a leaning wall using a hydraulic or leveraging system. If a lean in the cob wall begins to approach an unsafe limit, the best mode of action is carefully dismantling the wall and rebuilding.
STITCHING FOR A CRACK OR FISSURE
Create a ‘stitch’ across a crack or fissure by using an earthen or lime plaster. A lime plaster is recommended over an earthen plaster for repairs because it reduces shrinking by 50%. If the crack is too small to bother with a cob fill, but too large to simply cover with plaster, you may fill the crack with dry straw and then plaster over.
FILL & PATCH FOR A FAULT OR CAVITY
To create a ‘fill and patch’ for a fault or cavity, it is important to create a mechanism for the old cob to attach itself to the new cob.
- Insert oak pegs or galvanized slab nails at random points inside of the cavity. If the cavity is not large enough to insert the pegs, carefully chip away at the outside surfaces of the cavity until the pegs can be inserted.
- Create enough cob mix as similar to the original mix as possible to fill the cavity
- Carefully ram the cob mix into the cavity
- Allow to dry
- Apply a lime or earthen plaster to the exposed dry cob
Schedule
This is when to maintain what. We are still working on the best format for this. It may be a table eventually, but for now use the bullets below.
- Daily
- A daily task
- A daily task
- Weekly
- a weekly task
- a weekly task
- Monthly
- a monthly task
- a monthly task
- Yearly
- a yearly task
- a yearly task
- Every __ years
- task
- task
Instructions
This is how to maintain. The step by step how to template {{How to}} is most likely best for this part.
Troubleshooting
This is only how to troubleshoot basic operation. For complex issues, the solution might just say contact ________. It should be a table in this format:
| Problem | Suggestion |
|---|---|
| Example issue | Example solution or suggestion |
| Does not turn on | Make sure it is plugged in |
| Another issue | Et cetera |
Suggestions for future changes
This is where to lay out suggestions for how to make the project function better in the future.