Rotten boards at the top of foundation.

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alexvlsem
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Joined: Wed Dec 13, 2017 10:22 pm

Rotten boards at the top of foundation.

Post by alexvlsem » Thu Jul 19, 2018 4:58 pm

Hi Shannon,

As you can see at the attached photos the boards at the top of foundation completely rotten they fell out like sand when I removed stucco. What would be the best option to fill the void? How about to install rebar and fill the rest with concrete?

Aleksei
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Last edited by alexvlsem on Fri Jul 20, 2018 3:50 pm, edited 2 times in total.


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A. Spruce
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Location: California, USA

Re: Rotten boards at the top of foundation.

Post by A. Spruce » Thu Jul 19, 2018 5:04 pm

I think I'd have a stucco guy come and have a look at it. There should be a weep screed at the bottom of the wall, which is probably why you have a crisp line, thing is, that screed should be below any wood so that there is nothing exposed at the bottom of the wall.
If the women don't find you handsome, they should at least find you handy.

Clarence
Posts: 122
Joined: Mon Mar 27, 2017 9:15 am

Re: Rotten boards at the top of foundation.

Post by Clarence » Thu Jul 19, 2018 5:22 pm

The ground level is to high. From the bottom of the Stucco casing bead / Weep screed there should be 6 to 8 inches of clear space so water / Moisture would be directed away from the sill plate. Also there should have been a water barrier that over lapped the wood. Looks like you removed a casing bead at the bottom. The best fix would be to lower the ground elevation & install a water barrier & proper weep screed.

alexvlsem
Posts: 19
Joined: Wed Dec 13, 2017 10:22 pm

Re: Rotten boards at the top of foundation.

Post by alexvlsem » Fri Jul 20, 2018 5:12 am

Thank you for the comprehensive answer. I will follow your instructions. Only one thing I did not quite catch, what should I do with the empty space? Should I install a board (maybe pressure treated) or fill it with concrete?

Clarence
Posts: 122
Joined: Mon Mar 27, 2017 9:15 am

Re: Rotten boards at the top of foundation.

Post by Clarence » Fri Jul 20, 2018 6:15 am

You should remove the existing Stucco up say about 6 inches ( only the Stucco ) do NOT remove the water barrier below the Stucco. In the 6 inches remove the Stucco so as to expose the water barrier , metal lath & Stucco you want to be able to see each item as it was install originally . When you get to this point fold up the water barrier and install a product like Vycor over the exposed concrete foundation and up over the exposed wood ( use the primer for the selected product ) than fold the existing water barrier down install new Lath for the stucco along with a new weep screed. If you have a Stucco contractor in your area he should be able to correct the Stucco with very little problems.

alexvlsem
Posts: 19
Joined: Wed Dec 13, 2017 10:22 pm

Re: Rotten boards at the top of foundation.

Post by alexvlsem » Fri Jul 20, 2018 3:54 pm

Thank you. I believe I've understood all except one thing. You wrote: "When you get to this point fold up the water barrier and install a product like Vycor over the exposed concrete foundation and up over the exposed wood". The foundation (see the new photo) has a cavity from a rotten board so before applying a water barrier do I need to fill it with a new board?

Clarence
Posts: 122
Joined: Mon Mar 27, 2017 9:15 am

Re: Rotten boards at the top of foundation.

Post by Clarence » Fri Jul 20, 2018 6:34 pm

Yes in my opinion you can fill that area with a mortar mix as for rebar I don't think that would be required.

alexvlsem
Posts: 19
Joined: Wed Dec 13, 2017 10:22 pm

Re: Rotten boards at the top of foundation.

Post by alexvlsem » Fri Jul 20, 2018 7:49 pm

Thank you very much! Could you recommend a mortar mix that sticks well to concrete?

Clarence
Posts: 122
Joined: Mon Mar 27, 2017 9:15 am

Re: Rotten boards at the top of foundation.

Post by Clarence » Fri Jul 20, 2018 8:01 pm

Most all type N mortar mixes would be fine if you can not find a premix you can use a type N mortar and mix it with sand should not be any problem. Just make sure the area to receive the mortar is clean of all loose material.

alexvlsem
Posts: 19
Joined: Wed Dec 13, 2017 10:22 pm

Re: Rotten boards at the top of foundation.

Post by alexvlsem » Fri Jul 20, 2018 8:17 pm

If it is not difficult, could you provide your opinion about filling the cavity with a pressure treated board vs a mortar mix?

Clarence
Posts: 122
Joined: Mon Mar 27, 2017 9:15 am

Re: Rotten boards at the top of foundation.

Post by Clarence » Fri Jul 20, 2018 9:09 pm

mortar compatible with the concrete and moves at the same rate.
Wood will expand & move at a different than concrete and would crack the Stucco applied over it.

alexvlsem
Posts: 19
Joined: Wed Dec 13, 2017 10:22 pm

Re: Rotten boards at the top of foundation.

Post by alexvlsem » Fri Jul 20, 2018 9:35 pm

Thank you!

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