How To Install Round Windows

Installing a round window to your home or property can provide an aesthetically pleasing option to the regular square or rectangular window set, providing a little bit of extra charm to an otherwise normal section of the building. However, round windows do require a number of steps for sufficient installation due to their shape. This article will provide a number of steps that can be followed in order to efficiently place a round window in your property.

Cutting and Fitting

Firstly, you will need to measure the size of the opening in order to find out what size window will be required for installation. You should install corner braces angled into the centre of the square opening to make it circular shaped. Cut a section of 2 by 4 with a saw so the pieces fit within each of the corners of the potential window opening and nail them in with a hammer. Make sure that you install all of the four corner pieces in the same manner so the window has a secure bracing for fitting.

Insertion of the Window

Insert the round window Round Windows into the new opening and make sure the depth of the jamb is satisfactory. Run a thin bead of caulk around the nailing fin and carefully push the window into the opening, making sure that it is evenly displaced.

Securing the Window

Nail into the nailing fin with a hammer to temporarily hold the window in place, and then insert a few nails into the holes in the nailing fin. Make sure that you check to make sure the unit is plumb and level as this will allow the appropriate sitting for your round window. If the unit is not in a level position, add shims if necessary to make sure it is. Insert the rest of the nails by hammering one into each of the openings on the nailing fin.

Adding the Window Casing

Hold up the window casing into the hole that you have prepared for it. Make sure that it is perfectly centred within the hole before you secure it permanently, as it will very difficult to remove once done. Use a hammer and drive the nails in the top and bottom of the window casing as well as one on each of the sides. To test that the window is perfectly secure, make sure to press a little bit of weight on it. When doing this the window should not move and must feel solid. Once you have nailed the casing in you can then cut off the remaining shims. A small saw is advised for this, make sure to cut off the ends of the shims until they are even with the casing so that the remnants fits well with the window casing.

Finishing Touches

Finally, add another thin bead of caulk around the outside of the window to properly seal it in place and inspect the window edges to make sure there is a lack of gaps and cracks on it. Make sure to install window trim around the interior of the window to help better insulate it.

Frequently Asked Questions

Where can a rounded window be used?

Rounded windows are commonly used as portholes in boats and stunning feature pieces in churches.

But rounded windows are becoming more popular in home design and in commercial environments for people looking for something a little different to the standard rectangular window designs.

Add an element of nautical fun to your children’s bedroom or playroom with a round window. This will allow their imagination to flow, making them the envy of all their friends.

They’re also a great contemporary addition to any bathroom, allowing maximum light to flow whilst maintaining your privacy.

Round windows are a stunning, out of the box addition to any home, office or retail space. Not only are they functional windows, allowing you to control the amount of fresh air that gets into your space, they make the perfect feature piece.

Why should I choose ArcOframe for my round windows?

Every single round window frame we manufacture is made to measure, so you can be sure your round window will fit perfectly.

We use uPVC to manufacture all our rounded window frames. Because this is a more affordable material, it allows us to keep costs down, ensuring you receive a high quality, durable product, for an extremely reasonable price.

Plus, no matter where you’re located in the UK, we’ll deliver your round window right to you. We’ll also install your window on delivery to make sure there are absolutely no issues.

Ready to order your round window? Get in touch with us today. Simply call us on 01744 615 111.

What are the benefits of uPVC round windows?

The numerous benefits of uPVC round windows include:

  • Durability - Although one of the more affordable materials, uPVC is extremely durable and is non-corrosive, making it perfect for use in window manufacturing. Plus, it doesn’t warp or rot in extreme weather, making it the top choice for many.
  • Low maintenance - As well as it’s hard wearing nature, uPVC is very low maintenance. This means it’s super simple to clean, simply wipe it down with some water. Some of our uPVC round windows are also fully reversable, making this cleaning process even easier.
  • Practicality - Not only do they look great, but round uPVC windows are also a practical option as you can choose whether you want fixed or opened windows, with fixed windows being an especially low maintenance option.
  • Energy efficiency - Having energy efficient windows is a must for any home or business. So, you’ll be happy to know uPVC windows are amongst the best performing windows in the market. Their great insulation properties reduce heat loss within your home, helping you keep your energy bill down.
How are round window frames manufactured?

Here at ArcOframe we use the best profiles to create the perfect round window for your requirements. However, we can also collect your own profiles and use these.

To manufacture our gorgeous round windows, we use a uPVC bending method.

This process is quite complex, and it can take years of practice to perfect and master.

During this process, we use a profile bending machine.

The window frame material, uPVC, is inserted into the machine between rolls. The machine works by moving these rolls and creating a force which deforms the material into the desired shape. During this process the material will heat up, making it easier to deform and manipulate.

The material is then placed into a form to keep this desired shape whilst is cools down.

To get in touch with our experts and order your round windows today, email us at





Circular Windows Half Open Pivot