Return to the Remodeling Forum | Post a Follow-Up

Mortar and Freezing Tempaeratures

Posted by shw001 (My Page) on
Tue, Jan 16, 07 at 0:55

If I repair lay some bricks with fresh mortar when the temperatures are around 45-50 farenheit, and temperatures drop to below freezing in about 8-10 hours, will the mortar be damaged and not achieve full strength?

(I know you need to give concrete 2-3 days, but the mortar joints are not as thick as, say a four-inch thick piece of concrete).

Follow-Up Postings:

RE: Mortar and Freezing Tempaeratures

Yes and yes. When new mortar gets below about 40 the curing process slows down which adversely affects the final strength of the mortar. When new mortar gets below freezing, the moisture in it expands as it freezes which will cause the mortar to break apart. Also, the sub-freezing temperatures will weaken the bond between the brick and the mortar. There are accelerators on the market which some people will bill as "anitfreezes." Not true, they accelerate the curing process, but won't protect the mortar until it is cured. If you need to lay the bricks in that kind of weather, your only alternative is to figure out a way to keep the brick and mortar above 40 degrees for a few days.

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Remodeling Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here