What is the best method to add extra insulation to the window?

My window has lightweight drapes and sheers but I need ideas to add extra insulation for the winter months.

  11 answers
  • Dfm Dfm on Nov 07, 2017
    the first ting to do is caulk where glass wood meet. then caulk any gaps in the window trim. as far as i know...you cant over caulk. i like using the rope style calking its not messy and it handles like clay or play dough. if it gets dropped on the floor no bi deal pitch and start again. that will stop a good bit of cold air coming in.

    when the gaps are taken care of wash the window and trim. then then fun stuff. bubble wrap on windows, and then shrink wrap...the kind you hit with a hair dryer. i read that a very leaky spot is the glides the thing that the window go up and down on.- covered those with bubble wrap too.

    • Lea10012150 Lea10012150 on Nov 08, 2017
      I like the idea of rope style caulking, makes me think of my father way back when, and likely easier than a caulking gun for me. I am not very good with them. My living room window is 8’ wide with solid middle window and crank out side windows though.

  • Dfm Dfm on Nov 07, 2017
    now lets talk drapes. all insulated drapes are not created equal. some have a foam backing...as it wears, the backing flakes off. the heaver the material the denser it should be. let it puddle on the floor. hot air rises, cold air sinks.

  • Michele Pappagallo Michele Pappagallo on Nov 07, 2017
    You should be able to buy insulating film at your local home center. It looks like a clear plastic film, and you press it against the window and then use a blow dryer to help seal it onto the window and the frame. It seals all the edges and keeps drafts out.

  • Ginny Ginny on Nov 07, 2017
    Have you considered installing window blinds? They give extra insulation winter and summer against cold and hot sun. I have them at every window in my house except where I had glass block installed.

    • Lea10012150 Lea10012150 on Nov 09, 2017
      As well as caulking, I will consider blinds of some sort inside the frames. I am nosy and there is a lot of late night human traffic outside that we like to keep an eye on as well. Thank you.

  • Dfm Dfm on Nov 08, 2017
    id love to have honey.Comb blinds but my 50’s fixer is a bit quirky

  • Janet Pizaro Janet Pizaro on Nov 08, 2017
    Three M window insulation kits available at Home Improvement stores

  • Emily Emily on Nov 08, 2017
    Your window sounds like this one we have in a room that is not our living room (we call it the "blue room") I bought these cotton blue and white striped curtains at a yard sale. I hung blue flannel light weight sheets from the same hooks (or maybe I pinned them on to the regular drapery) anyway that works well . Now we use the window for plants so I just have a blue and white striped Roman shade that I found for free, we drop that down. Inexpensive fleece blankets make great insulators for regular curtains. I just use t pins to fasten them in.

    • Lea10012150 Lea10012150 on Nov 09, 2017
      I think I will add blinds inside the casings but I won’t be as lucky as you to find them free, used or in the size I need. However I can sew and make my own. Someone else suggested honeycomb blinds which I am going to investigate as well. Thank you for your suggestion.

  • Jewellmartin Jewellmartin on Nov 08, 2017
    How about hanging various throws, tapestry drapery material, or tablecloths between the windows and the drapes? It could be like a textile art gallery. 😇

    • Lea10012150 Lea10012150 on Nov 09, 2017
      This would work in another room, but we have a hospital bed as well as regular furniture in our living room so I think it would be a little too much.

  • Dfm Dfm on Nov 09, 2017
    take A candel or better yet an incense stick.....hold it near the window. That’s closed. Does it flutter? Does the smoke go one way or the other.
    That’s one way to tell if cold air is getting in. If cold air come in hot air can get out. I like hot air.

    • Lea10012150 Lea10012150 on Nov 09, 2017
      The window is 30 yrs. old so I am sure it needs to be caulked. I am going to install some sort of blind inside the casings as well for extra insulation.

  • Johnavallance82 Johnavallance82 on May 06, 2021


    You could use Polythene sheet across windows or Clingfilm, or Polystyrene sheet, or you could have heavy winter drapes with blanket or thermal interlining. You could have Thermal Film applied to your windows. Best wishes.