Failed Fiberglass Skylight | St Paul Presbyterian Church

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This was an existing Kalwall skylight that had yellowed and fiber bloomed (where the skylight takes impacts from hail and the exterior protection allows water into the system and separates the sandwich panel away from the interlayer of structure. This also allows for mold to grow and allows water to penetrate into the interior of the building.

When FRP panels are not correctly maintained (Gel-Coat every 5-10 years) fiber bloom will also occur—even without experiencing hail or other impacts.

An image showing the mottled surface of the skylight.
The mottled surface is an indication of fiber bloom.
A view of the yellowed skylight overhead.
Yellowed failed fiberglass skylight.

The results of improper or lack of maintenance.

Using SSI MAGS Bar to hold multiwall polycarbonate panels offers a great compromise between a fiber reinforced polymer or glass skylight.

Besides the initial cost, the MAGS Bar system allows panel replacement—from hail damage, for example— at a very affordable cost.

An image of the 4 bay ridge skylight atop of the church.
The 4 bay ridge skylight.
An image of the room below the skylight.
Lunch, meeting, break room.
An image of the crew at work.
A portable brake for bending aluminum flashing.
A tarp covers one side of the skylight awaiting resumption of work.
Covered, awaiting resumption of work.

Work continues.

A technician is installing the MAGS Bar base plate.
Installing the MAGS Bar base plate.
Four multiwall polycarbonate panels are being installed.
Polycarbonate panels are being installed.
The panels are masked in preparation for silicone caulk.
Masked in preparation for silicone caulk.
The skylight is covered with a tarp for the night.
The skylight is weatherproofed overnight.

The yellow is gone!

A view of the yellowed skylight overhead.
Yellowed failed fiberglass skylight.
A view of the finished skylight overhead.
The finished skylight.
An exterior image of the finished skylight.
The finished skylight.

Product used:

SKYLIGHTS SPECIALISTS, INC MAGS BAR

A Multiple Application Glazing System

  • 16 foot wide by 10 foot on slope saddle ridge skylight.
  • MAGS Bar frame.
  • A&C Plastics 16mm Multiwall Polycarbonate Sheet

AC Plastics Multiwall

Multiwall Product Data

Multiwall Product Details
A&C Plastics logo

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