Manufacturer JL Industries
SKU: RHTBA-Thermalblock-Series
Thermally Broken Roof Hatch

Thermalblock Series™ Series energy-efficient roof hatches provide a solution to reducing building energy costs with an R-value of 20. Two continuous gaskets with low thermal conductivity create a thermal block between the outside and the inside.  The durable construction and finish are designed to withstand heat, cold, and UV exposure. 

When the weather outside is colder, this combination of insulation and gasketing moderates the temperature on the inside of the roof hatch reducing condensation and icing.  The roof hatch can also reduce the amount of heat transferred from a warming exterior, keeping air conditioning costs lower.

The curb and the cover have 3" of polyisocyanurate insulation to give the thermal resistance of R-20.  a continuous seal around the cover maintains an air barrier between the interior and exterior..  A counterbalanced lid and easy-to-operate handle allow one-handed operation.


  • Material: 11 gauge aluminum
  • Standard Finish: Mill
  • Curb: Thermally broken single wall curb and conterflashing with tabs
  • Cover: Thermally broken cover stiffened to support a live load of 40psf
  • Gasket: Continuous, weatherproof EPDM sponge rubber adhesive-backed seal
  • Insulation: 3" polisocyanurate in curb and cover with thermal resistance R-20
  • Spring: Gas spring with integrated damper for smooth controlled lift assistance
  • Latch: Zinc-plated steel slam latch with inside and outside handles and padlock hasps, 20psf wind uplift
  • Hold Open Arm: Zinc-plated steel automatic hold open arm locks cover in open position
  • Hinge: Heavy duty zinc-plated steel pintle hinge
  • Sizing: Minimum: 26" x 24", Maximum: 48" x 48" or 30 x 96"
  • Clear opening: (Width -8") x (Length-1/2")

Note: for pitched roofs up to 7:12, mout hing side parellel to slope.  Door opens to 80°.

Additional Product Literature
Data Sheet