- Why use polycarb.
instead of glass?----Compare
Glass & Poly --- Reload
- Glass offers visual
clarity, but has drawbacks. Safety glass is required if installed within 12" of a door, 18" of
the floor or overhead. In vertical applications tempered glass is
okay, but in overhead applications tempered over laminated
annealed (windshield type glass) is required. In roof applications
this glass cracks easily and is very expensive. For insulation two lites of
glass, in an insulated unit, are necessary. The seals eventually fail and the unit will fog. Seal
warranty is 5 to 10 years, but is void in high moisture greenhouse
and pool enclosure applications.
- Since clear glass does not
diffuse light hot spots occur in greenhouses.
Glass is heavy, requiring a strong frame. A sophisticated
install system with aluminum and rubber gaskets is required or
leaks occur, especially on overhead glazing. Often numerous lites
of glass are required in a roof slope, resulting in horizontal
mullion bars that dam water and can easily lead to leaks.
Insulated glass should not overhang the eave, requiring a
horizontal mullion bar at this location and possible
- Polycarbonate is
virtually indestructible and is inherently safety glazing!
Football helmets and the inner layers of bullet resistant glass
are made of polycarbonate. Multi-wall polycarbonate is
inexpensive and has an insulation value similar to insulated
glass. Polycarbonate diffuses the light and is very easy to
install. One sheet of polycarbonate goes from roof peak to overhanging eave, effectively shedding
- Polycarbonate is resilient. When Cap is snugly installed, pressure of the
Cap cause polycarbonate to slightly dimple, creating
a watertight seal.
One of the great advantages to polycarbonate is that gaskets are
not required to achieve a watertight
seal. The more parts of a
glazing system, the more likelihood for leakage. Gaskets in
install system caps will often shrink, creating a gap for water to
- Glass Wall Sunrooms &
- Add glass to walls by installing windows, doors and/or fixed
- Use polycarbonate on the roof
and end wall, at least above doors and windows.
- Polycarb. is easy to install, lightweight, durable and easier
to make watertight.
- See interior & exterior of sunroom with windows on vertical, poly. on roof & end wall.
- Sunroom with fixed glass on vertical & polycarbonate on the
Enclosure with patio
and Lower Cost Sunrooms: On sunrooms, with roof rafters 16 ft.
or less, builders often use our Cap
End Sunrooms and Pool Enclosures: Most often builders often use our Base
& Cap System.