Can water soak through stucco?

Despite what many people think about stucco walls, stucco walls are not water-resistant. As a matter of fact water actually absorbs into the stucco. In most cases, the problem with water leaking through stucco is that the building envelope has been breached.

Does stucco let water in?

Since stucco is a masonry product, it is often believed to be waterproof already. However, this isn't totally true — stucco is indeed permeable and will let some water through.

Is stucco a water barrier?

Three-coat stucco is the most common exterior cladding here in Southern California; properly installed, it's tough, durable, and attractive. But it's not waterproof. No matter how skilled the plasterer is, rain will get behind stucco.

Does stucco need a drainage layer?

One-coat (synthetic) stucco over a cementitious backer board can work well, but it must have intentional drainage behind it. For traditional three-coat stucco, building codes often require two-layers of building paper behind the stucco.

What happens when water gets behind stucco?

Water leakage is a common issue with stucco in areas where seasonal rain is the norm. If water gets behind stucco it will soften the areas it comes in contact with, eventually causing the stucco to break away and fall off in sheets.

Identifying Water Intrusion Through Stucco

What is the main problem with stucco?

There are several stucco problems that you can encounter. The most common ones are staining and discoloration, stucco cracking, and moisture intrusion. Other problems include stucco extending below grade and caulking. Some of these issues will need either repair or remediation.

How often should stucco be sealed?

If new, stucco can be sealed with a clear concrete/ masonry sealer, which will penetrate into the stucco and stop moisture entrance. These are typically silicone type sealers. While effective, these finishes will usually need to be redone every 4-5 years.

How do you protect water from stucco?

A great way to protect the look of your stucco and prolong the life of your exterior stucco is to apply a Stucco Sealer by Rainguard®. Our Stucco Sealer is an easy to apply, reliable sealants that will help keep water and moisture from absorbing into the surface of your stucco.

Should I waterproof My stucco?

Waterproofing is essential for almost every building project. If not properly sealed, structures will allow moisture to seep into materials, where it can become trapped. If this moisture does not drain properly, it can cause rotting, damage and mold. With this in mind, it's important to properly waterproof stucco.

Does stucco need weep holes?

Weep screeds are generally only used on walls constructed with wood framing, and are not required on stucco-coated masonry structures or when adhered stone is installed over masonry.

Why you should not paint stucco?

Stucco needs to breath – One of the main reasons you shouldn't coat your stucco with paint is because stucco is porous. This allows moisture that hits the surface to easily evaporate away. A coat of paint can harm that breathability.

Can you use a pressure washer on stucco?

Yes, you can use a power washer or pressure washer to clean stucco. Just make sure to maintain a good distance between the nozzle and the surface, use the 1,500 PSI, and a 25- or 40-degree nozzle. Although, given the intensity of a power washer, seeking the help of a professional is always best.

How long do stucco homes last?

Stucco is a very durable finish material with a typical life span of 50-80 years or more. Although it is one of the most durable surfaces available, it also features the lowest annual maintenance cost when compared to other siding materials.

What are the disadvantages of stucco?

Is it safe to buy a stucco house?

Stucco can tolerate moisture and expansion only up to a certain point. It is not as good as brick veneer or vinyl siding for keeping water out of the exterior walls of your house during periods of heavy rain. It will repel water well in average climates, but it may not be recommended in extremely rainy areas.

Is stucco good for a house?

Stucco is a cement, sand, and water mixture, so it stays rigid, even in strong winds. Many folks may even prefer buying a stucco home over, for example, a brick structure. Additionally, stucco is fire- and pest-resistant, making it one of the most ideal residential building materials.

What does water damage look like on stucco?

Cracks and bubbles along the bottom edge of the wall — Resulting from a poor drainage system, water leaking through stucco walls shows up along the bottom edge. If you see dense cracks or odd bubbles, you're looking at the signs of stucco damage.

How long does it take for exterior stucco to dry?

In a traditional three-coat stucco system, the finish coat must be cured using the same practices as base coats. Moist-curing can be terminated after 48 to 72 hours, but the finish coat should remain uncoated for at least seven days to prevent coating failure or poor bonding.

What material is under stucco?

Sheathing is basically the “backing material” that can be found underneath the various layers of stucco that form the backing of residential and commercial buildings. They can be made out of wood, cement, gypsum, fiberglass and other materials.

Does stucco need air gap?

Stucco detailing with continuous rigid insulation take cues from EIFS by having an air gap to drain behind the rigid insulation. A second draining layer immediately behind the stucco is advantageous as well to quickly and evenly dry the stucco, reducing efflorescence and cracking.

How do you seal a stucco wall?

Sealing your stucco is a great way to prevent water absorption. New stucco should be sealed with a clear concrete masonry sealer, typically made of a silicone material. For older stucco that's already showing signs of cracking, waterproof elastomeric paints are an excellent choice to preserve and protect your stucco.

Can you put Drylok on stucco?

DRYLOK^® Masonry Waterproofer is not recommended for use on anything other than bare masonry and concrete surfaces. It can be applied to porous terra cotta, concrete, stucco, and cement.

Is it better to re stucco or paint house?

Stucco is a durable and great-looking exterior finish, but it isn't invincible. Ideally, stucco should be painted every five to ten years. It's important to paint and perform other stucco maintenance on the right schedule to keep your home looking great and to prevent hairline cracks from growing larger.