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Old 10-09-2019, 10:57 AM   #1
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mule board?


We are doing some renovation on our house over 3 floors.
We need to replace the 2nd and 3rd floor walls since the brickwork was done very badly and the wood studs were built into the middle of the brick, layered in. As the wood shrunk over the years (100 or so) and the house moved, the brick wall became loose. These are standard red bricks built in a brick nogging manner.
In addition to that the ground floor wall is built of 8" grey concrete block.


That seems solid according to the engineer but it apears to have a length of wood layered in at baseboard height and at ceiling trim height. I believe these are called mule boards or nailer boards to allow trim to be attached in the old days. These seem to be very common in old houses but should they be replaced or are they ok to leave?

Last edited by qwertyjjj; 10-09-2019 at 11:07 AM.
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Old 10-09-2019, 12:05 PM   #2
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Re: mule board?


If they are solid & not rotting they can be left in place.
Yes mule board is what they are called in the South.
They can also be found in brick walls & were used to nail the wood furring that the lath was nailed to.
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Old 10-09-2019, 12:27 PM   #3
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Is the wood able to take the compression weight of a brick wall above. I assume so but always figured wood would be less strong than concrete block.
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Old 10-09-2019, 02:36 PM   #4
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Re: mule board?


The Mule boards that I have work with are about 3.5 inches in depth & 2.5 inches in height. Also only used in multi Wythe brick walls.
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Old 10-10-2019, 03:03 AM   #5
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Re: mule board?


TERRIFIC INFO ! never heard that term nor encountered it,,, appreciate the post AND response ! ! !
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Old 10-10-2019, 07:12 AM   #6
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Re: mule board?


Quote:
Originally Posted by stadry View Post
TERRIFIC INFO ! never heard that term nor encountered it,,, appreciate the post AND response ! ! !
If you get the chance to work on buildings that were built in the 1800's & maybe some in the very early 1900's you would find the mule boards on multi- wythe brick buildings that had plaster interior walls. The Mule boards were the same size as the Brick being used & installed at the bottom than every 7th course of brick & at the top. Vertical furring was than nailed @ about 16 inch centers than wood lath nailed to the furring strips. Also these buildings would have wood window & door headers laid in the brick courses.
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Old 10-10-2019, 07:23 AM   #7
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Re: mule board?


remember horsehair being added to plaster & roughcut lath furring,,, that should count for something also worked on plank houses - 3 layers of roughcut planks nailed on 3 planes - vertical, horizontal, & the center on 45*
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