We had that happen years ago with a casement during a windstorm where the window gave way to the pressure around the opening--it is scary to wake up to that noise! Marvin is a reputable window brand and makes nice casements. In our case the window that exploded was a single pane wooden casement original to our 100-year-old house so we just replaced it and its twin with windows matching the originals made by a local window shop. But Marvin and other similar brands offer more bells and whistles and better warranties, depending on your needs.

Holy Cow LB! What room is that window in? Are the panes individual or are the mullions on top of the glass? Is the glass original to house? My guess is not original. I looked up both brands & sounds like Loewen produces high end wood windows which yours should be. Also read that should last a lifetime if installed correctly. I wonder if it’s worth contacting Loewen about your window - there may be some lifetime guarantee in there & it’d be good to keep matching windows in the house.

Thanks, Artemis. The explosion was crazy loud, and there was a strange spray of very thin flakes of glass, almost like snow flakes all over the room. KW, that window is in the beverage kitchen, so we will have to replace both casements. I don’t think my contractor has a relationship with Loewen, which is probably why he recommended Marvin. Online, it seems there are complaints about every brand of windows, so it’s not clear which ones are reliable. I think a previous owner replaced all the windows in the house when they renovated about 20 years ago. The same people who glued drywall directly to the cement foundation in the basement, so they didn’t necessarily care about proper installation. But good point about checking if there is a warranty! Huh. I accidentally posted the photo twice, but there seems to be no way to erase 🤷‍♀️

Do you know the year that the window was installed? Loewen has revised it's warranty language many times over the past decade - and I imagine many times prior to 2014-15.

Call Loewen Tech Support, forward pics and ask for their recommendations. That's the first step I'd take. They should be able to give you info to explain the occurrence. Replacing the glass unit would be my choice. A local window shop could construct the glass unit. I've done that.

Can't a glazier just replace the glass? That's what we did when a window broke in our house. Much cheaper than replacing the whole window. Unless you WANT to replace the whole window... :-)

I didn’t know that you could just replace the glass part! I will ask about that… thanks!

Not the fault of the window or install, just a strange set of circumstances. This would not be covered by any sort of warranty. I would contact a residential glass repair company or order a new sash from the manufacturer.

I installed Marvin windows we built in 2021, but Loewen gets good reviews here too.

I would call Loewen customer support. They will have a local guy/company that does warranty/repair work. He can measure the window and order the correct two-pane glass insert. We did that in our previous house that had Milgard windows, that weren't as good quality as these other two brands.

LB this means too that only the broken glass needs replacing, not both windows.

Another plus!

Glad someone got you pointed in the right direction. No need to change the whole window if it's otherwise okay. Swap the glass or the sash. Will be the best and least expensive way to go. Those two things rarely occupy the same space so that's a win.

So glad you are just replacing the glass. We had to do that at my dad’s house (also casements). Not spontaneous breaks, though. We called a local glass company to do it.

@Little Bird I'm sorry that happened to you. 😢