Moisture behind removed cabinet on exterior wall had mold growth and destroyed framing

 
 
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WHAT IS STUCCO... and how do we test it?

Fernando and Wendy are both certified Exterior Design Institute Stucco Inspectors.  Fernando is also a certified building code inspector with ICC and both are TREC inspectors. 

Please scroll down the page to watch a youtube video of how we test the stucco for moisture and wood rot.

 

There are two main types of stucco:

  • Cement based stucco is now the most commonly installed type over the main body of a home, and
  • EIFS = another type of stucco was and still is used - EIFS, which you may have heard called Exterior Insulating Finishing System or "artifical" stucco.  This type is still used on commercial construction and in was used in residential on the body of the home but also used as  decorative trim around windows, quoins and arches on top of hard coat stucco.  Fernando can tell instantly what type of stucco you have on your structure.  This product came to use in the 60's but wasn't until the 80' s and 90's that it became imfamous because this "barrier" system had a propensity to leak due to improper installations mostly - and once water got in it did  not let the water back out, creating mold and in particular black mold.  Since then many homeonwers have changed the exterior of their home to cementious stucco, and unfortunately have come to find that it also leaks. A good read can be found at this site provided by Exterior Design Insitute, which is the leading association for EIFS inspecttors:  http://www.exterior-design-inst.com/eifs-moisture-intrusion-problems.html   

Why do we need a Moisture Test Liability Waiver to test stucco? The only 100%  method to  determine whether there is damage to the inner wall cavity wood structure is to drill small holes for insertion of a test prod that  we use to determine moisture content.  If anybody tries to tell you they have a moisture detector that can read inside a stucco wall, they are not telling the truth.

Watch "how stucco is tested", below, for a Youtube video of Fernando actually performing this test.  We need the owner's permission to do this invasive testing.  Note that it is not "destructive" testing in that we will fill any holes made with the appropriate patching material, which will not allow any moisture to penetrate when the testing is finished. In many cases, you can't even see the holes after the repair is made. 

 

WATCH HOW  STUCCO IS  TESTED  

First, Fernando performs a visual inspection of the exterior to decide where the probable water penetration exists.  He then may test each window during the interior testing that is suspected of allowing water penetration,

Watch the following videos that show the exact testing method for the exterior 

Please view the video below to watch Fernando perform an exterior test on the underside of a balcony    -

 

 

 

How are windows  tested on the inside of a home?  Watch Fernando prod the interior wall structure of this home:

 

 

 Window and balcony leaks and the destruction it causes, more video::

 

 

 After the walls are opened up at the rear of a house - cantilevered area - a generic view::

 

 

Also see our inspection website for more information:  www.preferredinspectionstx.com 

 

Photos from our collection:

This stucco townhome is only three years old.

This stucco covered townhome is only three years old!      

                                               Viewing cut-open stucco on underside of overhang front of garage

 A common area of deterioration is seen in the above photo, which shows the under side of a cantilevered livingroom and the deterioration from leaking windowos above

Photo below shows "66 casing bead", which is a weep screed that allows any penetrating moisture to escape stucco structure

 

We offer Saturday inspections to be paid in advance by using Paypal.  If cancellation of the inspection is necessary, we will charge a small fee to be deducted from the refund (exception:  Angies List referrals).

Why does stucco fail?

 There are many reasons stucco fails to keep moisture out of a structure, but the common reasons are  as follow 

  1. The installers do not pay attention to details work around door and window openings, such as proper gaps for backer rods and caulking or install substrate with enough fasteners 
  2. The installation of windows and  attachment of window trim
  3. The attachment of flashings around balconies and porches or columns
  4. The installers do not install proper flashings, especially "kickout" flashings
  5. The installers do not install the sheathing to allow for proper configuration (depth and width) of joint gaps around windows and doors for the backer rod and low modulus caulking

 HOW DOES WATER GET INTO THE WALL

Water has a way of finding its way into any opening on the surface of a stucco installation that is an opening such as holes and cracks  these cracks are usually due to rotted substructure that is unable to hold the upper floor framing in place, therefore the upper levels shift and compress causing horizontal and diagonal cracks at windows, balconies and even flat walls.


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Preferred Home Inspections
713-249-8581
26406 Pine Canyon Drive, Spring Texas 77380
Licensed by Texas Department of State Health Services MAC #1002

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