As a fabricator i can tell you that 14 is the appropriate maximum for man made quartz countertops as long as that 14 is no more than 1 3 the total countertop width.
Quartz countertop overhang support requirements.
Now when we re on an island or a peninsula where we re all level and there s a ton of counter top going this way for support then we can for sure go from 8 even to 12.
Considering that granite marble and limestone can have overhangs weighing hundreds of pounds and considering how brittle granite countertops can be granite support brackets are imperative.
If you have a 26 countertop 14 overhang is too much.
Granite supports can be either functional decorative or both depending on your granite countertop installation.
Final determination on bracket requirements and spacing should be recommended by your fabricator based on the following factors.
Quartz countertops often do not need support.
You d have to reduce it to 13.
This is to avoid tipping.
For structures with supports on only 3 sides areas around dishwasher counters cabinets structure an additional support will be required under the silestone.
Most granite fabricators will recommend support brackets on overhangs over 12 however solely based on the overhang amount.
The maximum overhang without support is approximately 15 for 1 1 4 material in a narrow bar or 11 in 3 4 material in an island.
Once you have determined your particular quartz countertop support requirements and whether you are going to need to use ada countertop support brackets you can begin getting on with your project.
Owner greg fox goes over requirements for overhangs for either your granite quartz or other type of countertop.