HR40 Double Hung Window
Maximum Efficiency
Lock in your internal climate better with the HR40 Double Hung Window’s “ILS” sill interlock. The ILS engages with a compression bulb seal, reducing the risk of water infiltration, as well as improving the insulation power of the window further, eliminating air leaks
Triple Weather Seals
Rain, shine or anything in between won’t get through the anti-microbial triple weather seals of the HR40. The triple seal works in tandem with all the other insulation features of the HR40 to create a more truly impressive and efficient window.
Power-Strength Glass
Going well beyond the IRC building codes, HR40 windows are all double tempered for maximum strength. Not only that, they are self-cleaning on the outside with our rain-wash clean feature.
Well Beyond the Standard of Energy Star
Going well beyond the energy star requirement, HR40 comes with a .18 u-value. There’s nothing “standard” about our custom double hung windows. HR40 windows go above and beyond “standard” to give you windows that fit every aspect of your life.
Enjoy our dual-tilt sash that provides a much easier cleaning experience.




Triple weather interlocks that prevent air leakage from exiting or entering a home unnecessarily.


Carefully selected vinyl casing capping that is textured in a color matched to your window. Making it look majestic, not compromised.
