I will be starting to build a 12x20' shed this weekend. As a somewhat last minute idea, I decided to add in a couple windows. Wanting to modify my drawings for the design and be ready to start framing, I naturally wanted to know what size windows I would be using ASAP. A local lumber yard had a sale on windows, so I went down to see what they had to offer. I explained I was building a shed and looking for two windows in the range of 3' square - that anything in that general size would be fine since I will build the openings to suit. What he sold me was two 36x35" JeldWen windows, model DF1303 (Wood framed window with vinyl capping on outside). Being a novice with windows I didn't think anything of it until I noticed some other windows on new homes being built in the area - this is when I realized (after looking online) that the windows I bought are replacement windows rather than new construction windows with a nailing fin (which would obviously be better since this is new construction). Question - I am sure that these windows can be installed, but is it silly to install replacement windows for a new construction project? What extra work would there be, if any, and what drawbacks may there be to doing this? Should I just return the windows and get NC ones? I'm no expert, but it seems NC windows would be easier to install, as well as offer better water protection. I did inquire today and the guy on the phone (who I am pretty sure was the guy who sold them to me) said it isn't a problem, and that NC windows are more money. He said all you have to do is foam insulate between the window frame and RO, then mate your J-mould for the siding up to the sides and seal the gap with silicone. Is any of this accurate? Most installtion guides I have read in the last few days are much more complicated. I am suspicious that he is just trying to prevent a return since he sold me windows that were not ideal for my project. Keep in mind this is only a shed, so air tight seals are not a concern, but I naturally do not want water leakage to slowly destroy my framing. I would prefer to avoid any wood exterior framing on the window - I went with a vinyl exterior to limit maintenance.

Hi, can someone give us tips on furthering the life of a sliding glass door with blinds inbetween the 2 panes of glass? They are from Lowes, and look great, but someone pointed this out to me...after I paid and ordered. Also, the windows will replace a sliding glass door that is aluminum and single paned glass (it gets ice on it in the winter!!) These are not marked "energy star", but are double paned with blinds on the inside and Low E. Will that still count? Thank you!