We replaced all of the windows in our 1960 bungalow. When starting the process with Lux, they insisted we did not require any permits even though we were enlarging window openings. The installed the windows but neglected to use a seal around the window bottom sill and sides. When this was pointed out they told us it was not required. Our exterior renovation contractor contacted them on our behalf and told them that it was required to meet the envolope codes for Calgary. Lux told us that the codes are difficult to interpret and were not aware of this. It took Lux a month to come back and redo the windows which held up the rest of our renovation. In the meantime time (before the job was complete) they insisted on full payment and threatened legal action. Even after they redid the windows I had to call them back because they didn't bother to shim 80% of the windows resulting in them bowing along the sides. The door they installed was also out of plumb and square. When they finally fixed everything, they left a mess of the styrofoam expanding foam all over the window sills. As a result of them installing and replacing the windows several times, they damaged the drywall and we had to have a drywaller come in to fix all of the damage. I will never use Lux again.