How to Install Replacement Windows with Vinyl Siding | Expert Guide


Articles, products, and services offered on this site are for informational purposes only. We are part of the Amazon Services LLC Associates Program, an affiliate advertising program. is compensated for sales resulting from links on our website.

Please review our disclaimer before acting based on anything you read or see.

Home remodeling costs time and money, but there’s nothing more satisfying than doing it yourself. If you have a home project that requires you to know how to install replacement windows with vinyl siding. Worry no more; here we will give you a step-by-step guide on how to accomplish it.

How to Install Replacement Windows with Vinyl Siding

If you want to do window replacement with vinyl siding, perform the following steps:

  • Place the siding on the lowest wall, lock the first panel on the starter bar and drag it to attach it to the corner post. Check that the panels are fully locked along the entire length of the bottom. But make sure that the locking is not too tight.
  • Nail in the center of the nailing slot. Do not nail too tight, leaving a few inches of space between the nail head and the sheathing. This will provide greater mobility of the panels on both sides. So it is very important to be checking that the panels or sections can be moved.
  • Nail using roofing nails the maximum siding every 16 inches straight into the lath framing.
  • When finishing a row, trim the panels to fit. This adjustment will be according to the length of the row.
  • Remember that one inch is used to fit one on top of the other. For the corner, a quarter of an inch is used.
  • Take into account that neither initial nor final panels shorter than 24 inches long can be used.
  • Define with a square line the panel to be used and cut it out. For this, you can use special tin snips, a utility knife, or a circular saw. You can also use a grinding disc for trimming wood. This should be laminated with fine teeth set in an inverted position or a sheet of vinyl siding. This disc will be the most suitable tool.
How to Install Replacement Windows with Vinyl Siding

Now start with the Assembling process.

  • To the decorative objects that can have the wall, do not worry. There are special coatings to place on these accessories; you should only try to have them at hand. These coatings bring their indications to place them. Place the base of the assembly and then install the lining surrounding the base.
  • Place the accessory mounting cover, leaving a quarter of an inch for the panels to slide. But it turns out that certain objects or fixtures cannot be moved. In this case, you have to make adaptations. To do this, use pieces of panels by trimming the openings at the end of both panels by a quarter inch. Increase the inches according to the size of the object.
Installing a new window in an existing wall with vinyl siding

The install process

  • Install the panels on the sides of the object. As you continue upward, one row will match the bottom of the window. Then try to make one of the cladding pieces stand out on both sides of the window. Then hold the panel under the window and mark the width of the window opening. To do this, leave a space in the window opening. Space will be a quarter of an inch on the panel for the jack channel.
  • Attach the carvings on both sides of the crack to determine at what height to cut the panel. Make this cut with tin snips.
  • Use a hole punch for mortise locks and place tabs on the edge where you cut the panel. Make sure the tabs point outward.
  • At the bottom of the window, place a single or double utility mount in the jack channel. To preserve the pane’s visible surface at the desired angle, use a wedge behind the utility mount.

Read More: How to Clean Hunter Douglas Blinds

How to install vinyl replacement windows in a wood frame

Tie-down everything!

  • Fasten the panel around the window while assembling the lower row and place it in the single or double utility molding.
  • For the upper part of the window, no utility trim is needed, and the panels are cut in the same way as above.
  • When continuing with the siding in the lateral area, you may find that there is a ceiling. In this case, continue until you are under the roof section.
  • You will drag a diverter behind the jack channel. Over the roof and above the nailing cross in the last row of the side area. The diverter can be cut from an aluminum sheet.
  • Then cut and install the panel. You can also use it as an option to diverter an el deflection joint. Designing it from a molding strip. The L-shaped diverter joint can be placed under the last part of the stepped end to drains the water into the gutter.

Last steps

  • Turn the last row of panels into the top area of each wall. Measure the width needed for this last piece in several places at the top of the wall. Remember to remove a quarter of an inch for panel sliding. Cut the panel to the required height with those sizes you took.
  • Put the channel in jack. Every six inches, make tabs on the edge where you cut. The tabs can be made with a hole punch for a mortise lock.
  • At the top of the wall, place single or double utility molding in the joggle channel.
  • Install the panel, checking that it locks with the previous row and locks tightly when fitting it into the utility molding. Since it is also necessary for this panel to move, you may need to shim this last piece. You can also use double utility trim to maintain the ideal angle for the panel surface.

Finish the panels

  • You must finish the panels at the eaves and gables. You can use a two-piece cornice molding system to do this.
  • Check to see if you have installed a water-resistive barrier at the gable. For the cutouts in the gable area, you will use a pattern. You will make this pattern by blocking a short piece of siding on the last full row of the panel. Then you are going to hold a second piece against the jack channel. Mark the angle on the first piece of siding and cut this angle. And proceed to place the siding panels on the glacier. Adjust angles as needed.
  • The last piece of gable has to be nailed to the face with a long nail of the siding color. That’s it. With these steps, you will also install a new window in an existing wall with vinyl siding. You will even know how to install windows after siding.

Recommendations during Installation

  • The flanges should be placed in the opposite direction of the most traveled way. Both ends of the panels have a factory notch for overlapping.
  • You can also do installing vinyl replacement windows from the outside.
  • When panels overlap, ensure that they overlap up to the middle of the notch, at the end of the panel, or approximately one inch.
  • When measuring and cutting the siding, always leave a quarter-inch gap. This is where the siding meets the corner posts and the jack channel. If the siding to be placed is less than 40 degrees Fahrenheit, this gap should be 3/8 inch.
  • Be aware after each row that the alignments around the inside and outside corner posts are proper.
  • As you move up with the alignments, make sure that the overlaps are staggered. This is to avoid having two flaps in a row with vertical alignment. Now, if these flaps are at least two rows apart, there is no problem.
  • Install vinyl replacement windows in a wood frame.
  • Remember that on the outside of the window, the vinyl siding does not provide 100% waterproofing. Then it is necessary to reinforce by placing building paper and flashing. Be careful with the window sash track when attaching it. This will save you the problem of water seeping in and damaging the wood under the window.

On other types of windows

For the transition from horizontal to vertical siding, you will do the following. Finish the last course of horizontal siding with jamb channel and termination molding or double utility molding.

Then install a rigid header gasket and a jack channel. Always leave a small gap between the molding and the jack channel. The top piece of the jack channel should have a minimum of three 1/16″ weep holes. These, of course, should be drilled no more than 24 inches apart to divert water.

How to Install Replacement Windows with Vinyl Siding: FAQs

Can you replace a window without removing the siding?

Yes, with the new aluminum pre-frames, which effectively and easily allow the rooms’ opening to be made ready to receive an opening from their construction?

Do you install replacement windows from the inside or outside?

From both positions, first, give protection to the area where it will be made. Then the old window is removed. The new tracks are installed, and high-performance foam seals are made. Then insert the glass and proceed to insulate the construction box. Interior and exterior trim are done. Collect the protective items and you’re done.

How do you install vinyl windows without a flange?

When the slats are missing, it is necessary to insert fasteners through the window frame and the house window replacement. It is not difficult to obtain good results when you plan the window opening, check the correct height, and level the window before installation.

Install your windows now!

Now, with all the steps and recommendations we provided, get ready to install your window replacements. Remember that you can guide you to make other renovations, install custom replacement windows or window frames.

Or if you want to make a larger window or full-frame windows the important thing is that according to the window types, adjust the ideas. This also applies with Full-Frame Replacement Windows. Hope you learn how to install replacement windows with vinyl siding.

Comments are closed.