Cmu Block Question - Building & Construction - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction


Thread Tools Display Modes
Old 05-19-2008, 08:07 PM   #1
Join Date: May 2008
Posts: 2
Rewards Points: 10

cmu block question

I am building a foundation for my home and was wondering how many courses of block high can mortar joints be before a structural problem may occur. I have run into a problem of a mortar joint being two courses high befor I can alternate it.


scotty is offline   Reply With Quote
Old 05-19-2008, 08:31 PM   #2
concretemasonry's Avatar
Join Date: Oct 2006
Location: Minneapolis/St. Paul, Minnesota - Latitude 45.057 Longitude -93.074
Posts: 4,082
Rewards Points: 2,654

You coukd lay up the block to 8' high in one day if you are fast enough and do not have to grout.

If you have steel and grout, then you should go up half of that before grouting - then lay the rest and grout if the plans call for steel and grout. I hope you understand my description of the process if this is your first wall.

You should lay the block in running bond with each course alternated. If you are stacking, you made a mistake on your cousing layout.

The first course (full block, half block and corner block) and the corner leads are most important parts. After that, it is a matter of filling between the corner leads and building them up vertically as you go. Just keep a good string line. If you are not square, you will have problems for the rest of the job, especially if you put wood on top.


concretemasonry is online now   Reply With Quote
Old 05-19-2008, 08:34 PM   #3
Join Date: Mar 2006
Location: Austin, TX
Posts: 1,605
Rewards Points: 1,232

A mortar joint in a structural CMU is only one mortar joint high. Half bond, i.e. laying alternate course so that the joints fall in the middle of the preceding is not done for esthetics.

That said, just get back on bond on the next course.
Tscarborough is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Brick Ledge when using cinder block DaveMo Building & Construction 5 07-13-2011 09:46 AM
Cutting cinder block for a large door opening joeyb Building & Construction 2 02-10-2008 12:00 PM
Marrying a sloping stone wall to a cinder block wall. mrdol Landscaping & Lawn Care 1 11-09-2007 04:08 PM
Brick and block house footer question. ourzoo Building & Construction 2 07-01-2006 02:57 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1