Hello Jay, not sure what you mean by sill extensions. Are you asking if you can connect them for a longer run/system? If so, all sills have steps in their instructions to “splice” them next to each other.
@LearnGlazing no, a sill extension would be piece of aluminum that snaps or interlocks into the subsill to provide a sill that would extend past the face of the facade. If this isn't by the manufacturer then it would have to be field or shop fabricated with brake metal, which is less desirable.
Hey Peter, yes and no. both have the same function which is to divert water from the system out. Subsills are better because they are engineered extruded components rather than bent break metal.
We have seen it a few times also. It really only applies when the form sill or some element like it is decorative. But a lot of individuals want to use it for redundancy or as a second failsafe against leaks. The issue is that the formed sills bridge the thermal break that the mfg sill has. So it kind of defeats the point of that. If installed correctly a mfg sill is designed to get the job done.
Do most manufacturers have a sill extension to accommodate their sub sill?
Hello Jay, not sure what you mean by sill extensions. Are you asking if you can connect them for a longer run/system? If so, all sills have steps in their instructions to “splice” them next to each other.
@LearnGlazing no, a sill extension would be piece of aluminum that snaps or interlocks into the subsill to provide a sill that would extend past the face of the facade. If this isn't by the manufacturer then it would have to be field or shop fabricated with brake metal, which is less desirable.
Still very new to this, but is the sub sill the same thing as the sill flashing?
Hey Peter, yes and no. both have the same function which is to divert water from the system out. Subsills are better because they are engineered extruded components rather than bent break metal.
@@LearnGlazing Appreciate the timley reponse. Thanks for clarifying!
@@LearnGlazing Do you guys have a video that explains the shallow and deep glazing pocket?
@@petertrykoff4529 hey Peter, we don't but it would make a great video. We'll toss that in our mix
Fantastic!
Thank you Tom, we appreciate the compliment
Most architects in our area require BOTH of these sills
We have seen it a few times also. It really only applies when the form sill or some element like it is decorative. But a lot of individuals want to use it for redundancy or as a second failsafe against leaks. The issue is that the formed sills bridge the thermal break that the mfg sill has. So it kind of defeats the point of that. If installed correctly a mfg sill is designed to get the job done.