Finding Trouble Spots in Your Exterior Insulation and Finish System
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Stucco is a popular siding choice because of its aesthetic appeal, design flexibility, and durability. Over the years, most three-coat stucco siding systems–scratch coat, brown coat, finish coat–have been replaced by Exterior Insulation and Finish Systems, especially in residential construction. EIFS, as it’s commonly called, is a multi-layer siding system with three parts:
- Inner layer of foam nailed to exterior sheathing
- Middle layer of a polymer and cement base coat reinforced with fiberglass mesh
- Final exterior coat
As a general rule, if a building can leak, it will. When a siding contractor doesn’t properly install–or flash and seal–the EIFS, water can penetrate the system and damage the wood behind it. Look for these common problem areas:
- Roof and wall intersections: Must be flashed to keep water from the vertical wall, or water can penetrate the joint line.
- Decks: Should have flashing where the wood frame attaches to the house.
- Windows: Need flashing at the lower corners. Sealant should be malleable. If it’s hard and dried-out, replace it.
By spotting trouble areas early with an EIFS cladding system, homeowners can alleviate extensive–and costly–problems later on. If you notice areas that are leaking, call in a siding contractor with experience in EIFS to remedy the problem.
In most cases, the EIFS system won’t have to be removed, and repairs to the materials often weather and match the existing work. The Exterior Design Institute can help you find a certified EIFS inspector to examine your home.
Properly installed and waterproofed, EIFS works as well as any siding system.
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