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Xringer · 10-05-11, 11:13 PM

I've been looking at the Pella 350 line (top of the line) triple pane sliders for my den..
The old windows aren't doing the job anymore..

I found the U-Factor was just under 0.3 on average, with the best around 0.27 to 0.29.

So, today I went back and looked at the cheapo Pella sliders (48x48) and they were 0.30! On Sale, for $150 each..
Shop ThermaStar by Pella 48"W x 48"H Vinyl Dual-Pane New Construction Sliding Window at Lowes.com

The only problem with these is they are for new construction.
I would have to score and break the nail-fin off all four sides.
But worst of all, there is an outside molding/flange, all around the edge.
I'm not sure if it would work for me or not..
The other thing I need to find out, can these be fastened to the 48x48
box/ 2x4 frame, like a regular Replacement window.?.
The Replacement window version of this $150 window is $237.00

The price is right. I can get 4 for $600. One quote for the '350' sliders
was $434 each.. And that wasn't even a Replacement style.. It had nail-fins!

10-05-11, 11:13 PM	#28
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	I've been looking at the Pella 350 line (top of the line) triple pane sliders for my den.. The old windows aren't doing the job anymore.. I found the U-Factor was just under 0.3 on average, with the best around 0.27 to 0.29. So, today I went back and looked at the cheapo Pella sliders (48x48) and they were 0.30! On Sale, for $150 each.. Shop ThermaStar by Pella 48"W x 48"H Vinyl Dual-Pane New Construction Sliding Window at Lowes.com The only problem with these is they are for new construction. I would have to score and break the nail-fin off all four sides. But worst of all, there is an outside molding/flange, all around the edge. I'm not sure if it would work for me or not.. The other thing I need to find out, can these be fastened to the 48x48 box/ 2x4 frame, like a regular Replacement window.?. The Replacement window version of this $150 window is $237.00 The price is right. I can get 4 for $600. One quote for the '350' sliders was $434 each.. And that wasn't even a Replacement style.. It had nail-fins!