Palm Beach County Contractors

EIFS in the Storm

Stucco over foam looks simple, but there are five layers working together to keep water out and resist 170 mph winds. See how each layer does its job.

Calculate Wind Loads Explore Layers

Five Layers, One System

Each layer has a job. Skip one, and the whole system can fail.

1. Substrate

The wall behind everything. Can be CMU, concrete, sheathing over studs. Must be strong enough to hold fasteners that resist wind suction.

Varies

2. Adhesive + Fasteners

In hurricane zones, use BOTH adhesive and mechanical fasteners. Adhesive alone can fail from heat cycling and moisture. Fasteners provide redundancy.

4-6 fasteners/panel

3. EPS Foam Insulation

Expanded polystyrene foam provides insulation and creates the wall shape. Typical 1-4 inches thick. Must be rated for the exposure and secured to resist suction.

1" to 4"

4. Base Coat + Mesh

Reinforced cementitious base coat with fiberglass mesh embedded. This is what resists impact. High-impact mesh required in debris zones.

1/8" to 1/4"

5. Finish Coat

Acrylic or mineral finish provides color, texture, and first line of weather protection. Also helps with impact resistance when properly applied.

1/16"

EIFS Fastener Estimator

Estimate fastener requirements based on wind pressure and panel size.

Fastener Calculator

Wind Pressure (C&C) -72 psf

Panel Size 4 x 8 ft

Fasteners per Panel

Fastener Capacity

100 lbs

Common Questions

Real answers about EIFS in hurricane zones.

Yes, when properly designed and installed. Modern EIFS with proper attachment, impact-resistant mesh, and drainage behind the foam have performed well in hurricanes. The key is adequate mechanical fastening to resist 170 mph wind suction and proper water management.

EIFS in Palm Beach County must resist component and cladding pressures that can exceed 60-80 psf depending on building height and location on the facade. Corner zones have the highest loads. The EPS foam, base coat, and finish must all be attached to handle these pressures.

EIFS fails when: 1) Adhesive-only attachment loses bond from moisture or heat cycling, 2) Fasteners are too sparse for the wind load, 3) Impact damage breaches the weather barrier, 4) Water infiltration rots the substrate. Mechanical fastening plus adhesive is now standard in hurricane zones.

Yes for windborne debris protection. Florida Building Code requires impact resistance in the HVHZ and wind-borne debris regions. EIFS can meet this with reinforced base coats and high-impact mesh, or with separate impact-resistant sheathing behind the system.