Jump to content

Hardcoat stucco questions.


palmettoinspect
 Share

Recommended Posts

I’m not very experienced with stucco systems and rarely inspect them so I have a few questions and would like some opinions about this hardcoat stucco system. Please correct me if I’m wrong, it appears to be typical 2-3 coat hardcoat system over fiberboard. It has plant-ons added at front corners and around front windows. No visible metal lath. The only thing visible from the attic was the fiberboard. There are vertical expansion joints and hairline cracks in various spot. No kickout flashing at roof and wall junction.

My questions are:

1. Is it ok to but the stucco directly to the window brick mold?

2. Is drip flashing required to protect the brickmold?

3. Is it ok/typical to put hardcoat stucco over fiberboard?

Any other issues or concerns with the pictures are appreciated.

Click to Enlarge
tn_2010920211723_P9200062.jpg

34.06 KB

Click to Enlarge
tn_201092021186_P9200064.jpg

92.24 KB

Click to Enlarge
tn_2010920211917_P9200082.jpg

50.21 KB

Click to Enlarge
tn_2010920211841_P9200078.jpg

55.52 KB

Click to Enlarge
tn_2010920212034_P9200098.jpg

70.91 KB

Link to comment
Share on other sites

I’m not very experienced with stucco systems and rarely inspect them so I have a few questions and would like some opinions about this hardcoat stucco system. Please correct me if I’m wrong, it appears to be typical 2-3 coat hardcoat system over fiberboard. It has plant-ons added at front corners and around front windows. No visible metal lath. The only thing visible from the attic was the fiberboard. There are vertical expansion joints and hairline cracks in various spot. No kickout flashing at roof and wall junction.

My questions are:

1. Is it ok to but the stucco directly to the window brick mold?

2. Is drip flashing required to protect the brickmold?

3. Is it ok/typical to put hardcoat stucco over fiberboard?

Any other issues or concerns with the pictures are appreciated.

If I assume that it's actually cementitious stucco, I'd answer as follows:

1) A gap should be maintained between the stucco and wood brickmold on the sides and the bottom for a backer rod and elastomeric sealant. The amount of moisture that stucco normally 'breathes' is more than needed to rot wood.

2) Drip flashing is required, especially for wood brickmold and a wood window frame.

3) I've never heard of fiberboard being described as a suitable substrate for stucco.

Metal lathe should be completely encapsulated by the base coat but the screed should be visible along the bottom.

Those 'plant ons' look suspicious also. I often see cement board substrates with EPS foam board for trim (plant ons), but the stucco should be contiguous over those surfaces, unlike what's shown in your photo.

If you don't see much stucco in your part of the country, perhaps some stucco start-ups attempted this job and ruined it.

Most of my info is from the Plaster Stucco Manual available from the Portland Cement Association.

Marc

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...