# Mortar Joints

**URL:** <https://community.blackspectacles.com/t/mortar-joints/918>\
**Category:** Project Development & Documentation\
**Created:** [March 17, 2020, 12:26am UTC](https://community.blackspectacles.com/t/mortar-joints/918 "2020-03-17T00:26:37Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ridlby](https://blackspectacles.com/uploads/images/21.png) [@ridlby](https://community.blackspectacles.com/u/ridlby)\
**Post date:** [March 17, 2020, 12:26am UTC](https://community.blackspectacles.com/t/mortar-joints/918/1 "2020-03-17T00:26:37Z")

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Hi,

The mock exam says that a flush joint is adequate to shed water.  
The resources that I read recommended otherwise. I checked _Fundamentals of Building Construction_. The version that I found says _“The concave joint and vee joint shed water most effectively and are the most resistant to freeze-thaw.”_  
Could you please confirm if the book characterized the flush joint differently in a newer version.

Thanks,

 ![image](https://canada1.discourse-cdn.com/flex029/uploads/blackspectacles/original/1X/29501ae3d05686a71464fc8c503d1075b30ffce6.png)  
 ![image](https://canada1.discourse-cdn.com/flex029/uploads/blackspectacles/original/1X/9925eb0b7def107457a80c5c78951ea5043d74b3.png)

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**Author:** ![cat.heard9](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.blackspectacles.com/cat.heard9/32/401_2.png) [@cat.heard9](https://community.blackspectacles.com/u/cat.heard9)\
**Post date:** [March 17, 2020, 1:32am UTC](https://community.blackspectacles.com/t/mortar-joints/918/2 "2020-03-17T01:32:44Z")

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Hey @ridlby; because of the way the question is phrased, I’m thinking ‘flush joint’ would shed water adequately. I notice in the phrase from the _Fundamentals of Building Construction_ that it references the **most effective** joints for shedding water, not just ‘adequate’ joints. I’m also wondering if, because the question asked you to pick three answers, perhaps there were three more correct answers than a flush joint?

I wouldn’t say a flush joint is the _best_ solution if water pooling/infiltration is a high priority issue, but it would work, as it creates one, solid surface for water to run down, as opposed to some other joints like ‘raked’ or ‘struck’.