Buying replacement windows is something you can do to elevate the value of your home, make your home more efficient, and give your home a new level of aesthetic appeal. If you make the decision to go a DIY route with installing your replacement windows, you should make sure you have exactly what you need on hand before you get started, from the tools to the hardware. However, there are a few little supplies DIY homeowners tend to forget to pick up when they start getting everything together. Here is a short list of materials you should invest in before a DIY window replacement project. 

New Window Trim

If the window trim you have in place now looks fine, you will probably not pick up new pieces before replacement window installation starts. However, you really are better off to get the new trim. As you are pulling out the old windows, the thin trim pieces can break or crack because they have to be taken off and are nailed in place. Plus, if there are slight variations in how the window is seated in the existing opening, you can cut the new trim to accommodate those variances instead of trying to rearrange what you already have. 

Spray Foam Insulation

No matter how good the new replacement windows fit in place, you are bound to have a few tiny cracks and crevices where air can slip through. These tiny cracks and crevices must be properly filled with insulation. Otherwise, those fancy new double or triple-paned windows will not be as efficient as they need to be. Pick up a can of spray foam insulation to fill in those little opened areas before you replace the trim around the windows. It will make all the difference in achieving an overall tight installation. 

Thin Wood Shims

No matter how square and perfect you expect your house will be, you will likely find things a tiny bit off square when you go to put in a new window. Because the existing windows were probably installed when the house was built, they will fit just fine even if the house settles a bit after construction. Unfortunately, when you put in new windows, you will often find that the window does not sit in a perfectly square or level position. Thin wood shims can be used around the casing to bring the window to a perfectly level and square position. 

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