How To Look At A House

McGarry and Madsen's home inspection blog for buyers of  

site-built, mobile/manufactured and modular homes

What are common problems with stucco?

Saturday, January 18, 2020

There are three kinds of wall finishes that are commonly called “stucco,” and each has its own particular issues. To know how to tell the difference, go to our blog post Do stucco walls mean a house is concrete block? 

1) Stucco over wood frame - When a house is wood-stud frame, the stucco is applied in three coats over expanded wire mesh which is separated from the wall sheathing by a moisture barrier—typically Tyvek or a similar material, or roofing felt. This is also called hard-coat stucco. Because the wood wall framing and the stucco have different rates of expansion/contraction, the stucco must be properly installed with expansion joints and correct flashings to accomodate it. When not installed correctly, any cracks let moisture into the wood framing and rot follows. See our blog post Why is my stucco cracking? and What are the signs of stucco wall leaks? for more on this.

2) EIFS (Exterior Insulated Finishing System) - Also called synthetic stucco, it is essentially a foamboard and fiberglass mesh attached to wall sheathing that is covered with a polymer-based material, and then textured to look like stucco. It is an alternative to hard-coat stucco. Go to our blog post What is the difference between EIFS and stucco? for more info on the materials and the recurring problems it has.

3) Stucco over concrete block - This is the most stable type of stucco and least likely to have a problem. All stucco finishes will develop fine cracks over time, but the underlying concrete block can absorb and disspate minor moisture intrusion without damage to the structure. Adhesion issues may occur if the stucco is not applied in the three required coats and at the correct thickness. Cracks should be be repaired and openings at windows and doors caulked on a regular schedule.

   All three types of stucco will crack when the house is experiencing structural movement due to foundation problems or a sinkhole. If you are experiencing more than minor cracking in your stucoo, we suggest reading How can I tell if a crack in a stucco wall is a structural problem and what is causing it? and What are the warning signs of a sinkhole? 

   By the way, stucco is also applied over solid-concrete wall houses, like the one shown below, and has a similar low level of problems to concrete block.

• • • • • • • • • • • • • • • • • • • • • • • • • • •

Here’s links to a collection of some of our other blog posts about STUCCO:

What causes raised white lines of residue on a block wall that are crusty and crumbling? 

What is the difference between Acrocrete and EIFS? 

What is the average life expectancy of stucco? 

 • Is the stucco on a wood frame house allowed to extend down into the ground? 

Does stucco need expansion joints?

    Visit our EXTERIOR WALLS & STRUCTURES page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.

Water Heaters

Water Heater Age

"What Are The

Signs Of..."

Septic Tank Systems

Structure and Rooms

Plumbing Pipes

Termites, Wood Rot

& Pests

Sinkholes

Stairs

When It First

Became Code

"Should I Buy A..."

Park Model Homes

Site

Shingle Roofs

Safety

Stucco

Remodeling

Wind Mitigation

Roof and Attic

"Does A Home

Inspector...?"

Pool and Spa

"What Is The Difference Between..."

Radon

Brick

Plumbing

Concrete and

Concrete Block

Metal Roofs

Foundations

Modular Homes

Rain Gutters

Mold, Lead & Other Contaminants

Condominiums

Older and

Historic Houses

Crawl Spaces

Mobile-Manufactured Homes

Building Permits

Life Expectancy

Clay Soil

Insurance

Floors

Insulation

Toilets

Exterior Walls

& Structures

Generators

Common Problems

HUD-Code for

Mobile Homes

Garages and Carports

Flat (Low Slope) Roofs

Electrical Panels

Sprinkler Systems

Electrical Receptacle Outlets

4-Point Inspections

Hurricane Resistance

Frequently Asked Questions (FAQ)

Home Inspection

Heating and Air Conditioning

Building Codes

Fireplaces and Chimneys

Inspector Licensing

& Standards

Energy Efficiency

Washers and Dryers

Electrical

Kitchens

Doors and Windows

(placeholder)

Cracks

Electrical Wiring

Click Below  

for Links

to Collections

of Blog Posts

by Subject

Plumbing Drains

and Traps

Appliances

Smoke & CO Alarms

Aging in Place

Top 5 results given instantly.

Click on magnifying glass

for all search results.

Bathrooms

Lighting

AFCI, CAFCI,

DFCI, & GFCI

Sinks

Air Conditioner & Furnace Age/Size

Attics

Electrical Switches

Siding

Search

This

Site

Water Intrusion

Electrical - Old

and Obsolete

(placeholder)

Foundation Certifications

Tiny Houses

About McGarry and Madsen

(placeholder)

Wells

Buying a home in North/Central Florida? Check our price for a  team inspection by two FL-licensed contractors and inspectors. Over 8,500 inspections completed in 20+ years. In a hurry? We will get it done for you.

Moisture Problems

Crawl Spaces

Bedrooms

Closets