6 Things You Need to Know Before Replacing Windows in a Stucco House

Stucco is a durable material with a look that can’t be matched by brick or lap siding. It's a popular choice for many builders, especially for modern home designs. Stucco comes in various colors and textures and is an affordable option compared to other siding materials.

While stucco itself is relatively inexpensive you’ll need to keep a few things in mind as you embark on your window replacement journey. One of those being that repairing, remediating, and installing stucco requires lengthy labor from stucco experts if you want it done right. In this post, we’re sharing a few things you need to know before replacing windows in your stucco home so that you know what to expect and how to prepare for your project. 

6 Things You Need to Know Before Replacing Windows in a Stucco Wall

Deciding to replace the windows in your home is not a decision that should be taken lightly. If energy bills are through the roof or your windows are warping and damaged from years of weather damage, then replacement windows can keep your family comfortable and warm. 

When it comes to replacing windows in a stucco wall, you want your chosen window installation company to take a little more care. Keep the following in mind.

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1. There are Different Methods to Replace Windows in Stucco Walls
2. There are Different Types of Window Frame Options for Stucco Walls
3. Damaged Stucco Leads to Further Deterioration and Cracks
4. Removing Stucco can be Dangerous
5. Bad Stucco Application is Noticeable
6. You Want an Experienced Contractor for your Stucco Window Replacement

1. There Are Different Methods to Replace Windows in Stucco Walls

Window insulation companies each have their preferred method of insulation. For stucco, the experts you choose for the job should know the possible risks and delicacy of stucco walls.

Replacing windows can often mean starting from scratch by tearing out the stucco around it, and removing the window frame, fin, etc. Then, the rough opening is re-waterproofed for a new window to be installed.

This method is labor-intensive and may even require hiring a stucco contractor to repair or remediate the stucco of the home.

When this is done on a stucco wall, there is the risk of cracking the stucco and exposing it to moisture. This can result in water infiltration problems down the line. 

To keep the stucco intact, another method may be carried out. This involves cutting down the existing window frame to accommodate an insert window or retrofit window.

Insert windows with a Z-bar flange are popular for this method and are placed over the previous window frame. The benefit of this method is that the existing waterproofing and stucco are not disturbed.

2. There are Different Types of Window Frames for Stucco Walls

As you do your research you may hear about different types of window frames or window flanges. You’ll want to pay attention to this because it will determine the scope of your installation, labor, and costs.

Windows used for replacement window projects will either have a stucco flange or a nail flange around the frame.

• Stucco Flange Window Frames
• Nail Flange Window Frames

Stucco Flange Window Frames

Windows with a stucco flange are also called flush fin or jump frame windows. These are commonly used for replacement window projects in stucco homes. They make the removal process a little easier because it only requires a pocket installation.

A pocket installation uses insert windows. Insert windows are made in flush-fin and block-fit frames. To install these windows the existing window’s sashes are removed but the frame is left and sometimes trimmed down.

The new window is set inside the already-in-place window frame and the stucco flange hides the existing frame from the exterior. This is our preferred method if there is no water or structural damage to the window opening.

Many window replacement companies have their own preferred methods if they take on stucco projects at all. If there is existing water damage you’ll want to use new construction windows with a nail flange and essentially start from as close to new as possible. 

You can see and learn more about stucco flanges in the video below. The video features Milgard windows with a stucco flange, what they call a Z-Bar. However, Milgard windows are no longer available in Texas. So, our go-to for stucco replacement window projects is now Alside.

New Construction Window Frames

New construction windows have a nail flange, we usually call it a nail fin. The nail fin is set back about an inch from the face of the window frame. If you’re installing windows in a new wall or new opening you’ll want to use this type of frame.

If you use this type of frame in a replacement project you’ll need to remove more of the existing stucco and then rebuild the stucco after the new window is installed. 

3. Damaged Stucco Leads to Further Deterioration and Cracks

Stucco is often labeled as being "durable," but it's actually water-permeable. If stucco is damaged and has exposed cracks, moisture can lead to mold, mildew, and wood rot.

Repairs are possible, but for a better long-term solution, an entire remediation process may be necessary. Remediation involves removing the stucco (from corner to corner) and addressing root issues and causes. It is a costly and time-consuming process.

Make sure to resolve existing problems with your stucco before you begin your window replacement project.

4. Removing Stucco Can Be Dangerous

Stucco removal is hard work. The material is strong, and if you don't end up in bed from pure exhaustion, there are other dangers at play.

Beware of the dangers of asbestos. While stucco made today doesn’t have this material in it, stucco installed on houses between 1940 and 1990 may have asbestos in the plaster.

Additionally, removing stucco requires cutting through a wire mesh that can get into your eyes if you’re not wearing goggles. 

Personal protective equipment (PPE) is needed to protect your eyes and lungs. These items include: 

• Safety glasses or goggles
• Face shields or dust mask
• Gloves and barrier creams
• Head protection
• Body protection, such as coveralls, boots, chemical suits, and sunblock

5. Bad Stucco Application is Noticeable

Stucco patch-up jobs can ruin the aesthetic of your home.

Stucco removal for window replacement involves hammering the wall until it cracks and crumbles. Other companies may use a circular cutter to create a new window hole.

Either way, stucco patching or replacement can leave you with mismatched stucco colors or new cracks. During stucco removal, there is also a risk of damaging moisture protection in the wall itself.

If your window replacement job requires some stucco repair make sure the person doing it is experienced so your results can be a beautiful finish.

6. You Want an Experienced Contractor for your Stucco Window Replacement

Not all window companies are equipped to handle replacement windows for stucco homes. When selecting a team, do your research, and read reviews. Ask the company the following questions:

• Have you had a successful window replacement project in a stucco home? Can I see photos or view the job?
• What method do you use for removing the existing window and replacing it?

Replacing Windows Successfully

As you can tell, approaching stucco should be done with caution. Ideally, you want a window replacement job that poses no threat to the wall itself, as this can lead to costly repairs or a remediation process of the entire stucco exterior. 

Hiring a trustworthy window replacement company is a consideration that can save you time and money.