EIFS & Manufactured Stone Siding

EIFS (Synthetic Stucco or Dryvit) and Manufactured Stone Siding:
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Potential Problems and Solutions
A brief overview of the risks and benefits of these popular siding materials.

Introduction
EIFS (Exterior Insulation and Finish System) and Manufactured Stone Siding are two types of cladding materials that have gained popularity in recent years for their aesthetic appeal, durability, and energy efficiency.  However, these materials also pose some challenges and risks if not installed properly, especially in terms of water intrusion and rot issues.  This document will provide a brief summary of why EIFS and manufactured stone siding can be problematic, and how to prevent and address these problems.

EIFS Siding
EIFS siding consists of a layer of foam insulation board attached to the exterior wall, covered by a synthetic stucco finish.  EIFS siding can provide a smooth and seamless appearance, as well as improved insulation and reduced air leakage.  However, EIFS siding can also trap moisture behind the wall, leading to water damage, mold growth, and structural deterioration.

Some of the common causes of water intrusion in EIFS siding are:
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- Improper flashing and sealing around windows, doors, and other penetrations
- Lack of drainage system or weep holes to allow water to escape
- Cracks or holes in the stucco finish or the insulation board
- Improper installation of the insulation board, resulting in gaps or misalignment

Water intrusion in EIFS siding can have serious consequences for the building, such as:

- Wood rot and decay in the wall framing and sheathing
- Mold and mildew growth, which can cause health problems and odors
- Reduced thermal performance and increased energy costs
- Reduced structural integrity and increased risk of collapse

To prevent and address water intrusion in EIFS siding, it is essential to follow the manufacturer’s guidelines for installation, maintenance, and repair.  Some of the best practices for EIFS siding are:
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- Use proper flashing and sealant around all openings and penetrations
- Install a drainage system or weep holes at the bottom of the wall to allow water to drain
- Inspect and repair any cracks or holes in the stucco finish or the insulation board
- Ensure that the insulation board is installed correctly, with no gaps or misalignment

Manufactured Stone Siding (Adhered Manufactured Stone Veneer)
Manufactured Stone Siding is a type of cladding material that mimics the appearance of natural stone, but is made of concrete, aggregates, and pigments.  Manufactured stone siding can create a rustic and elegant look, as well as provide durability and fire resistance.  However, manufactured stone siding can also be susceptible to water intrusion and rot issues, similar to EIFS siding.

Some of the common causes of water intrusion in manufactured stone siding are:

- Improper flashing and sealing around windows, doors, and other penetrations
- Lack of drainage system or weep holes to allow water to escape
- Cracks or gaps in the mortar joints or the stone veneer
- Improper installation of the stone veneer, resulting in poor adhesion or unevenness

Water intrusion in manufactured stone siding can have serious consequences for the building, such as:

- Wood rot and decay in the wall framing and sheathing
- Mold and mildew growth, which can cause health problems and odors
- Reduced thermal performance and increased energy costs
- Reduced structural integrity and increased risk of collapse

To prevent and address water intrusion in manufactured stone siding, it is essential to follow the manufacturer’s guidelines for installation, maintenance, and repair.  Some of the best practices for manufactured stone siding are:
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- Use proper flashing and sealant around all openings and penetrations
- Install a drainage system or weep holes at the bottom of the wall to allow water to drain
- Inspect and repair any cracks or gaps in the mortar joints or the stone veneer
- Ensure that the stone veneer is installed correctly, with good adhesion and evenness

Conclusion
EIFS and Manufactured Stone Siding are two types of cladding materials that can enhance the appearance and performance of a building, but also pose some challenges and risks if not installed properly.  Water intrusion and rot issues can compromise the integrity and safety of the building, as well as cause health and energy problems.  To avoid these problems, it is important to follow the manufacturer’s guidelines for installation, maintenance, and repair, and to use proper flashing, sealing, drainage, and inspection techniques.  By doing so, EIFS and manufactured stone siding can provide a long-lasting and attractive solution for any building.

Installation Guide & Detailing Options...
Contractors who follow Manufacturer and Industry Practice Guide Lines not only Reduce Their Liability, ​they keep their Customers Happy and Confident in their Home.

Knowledge is Power
Continued Education and Refreshing One's Knowledge is needed in all Construction Trades!

Prevent Concealed Future Damage - Reduce High Risk Liability
(Always Follow the Manufacturer's Installation Guidelines)​

EIFS Installation Information
EIFS Restoration Guide
Dryvit Brand - Approved Sealants
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Adhered Manufactured Stone Veneer Installation Information