What Does Window Mulling Mean In Construction?

What Does Window Mulling Mean In Construction?

What Does Window Mulling Mean In Construction?

Window mulling is a construction process that involves combining multiple windows into a larger, more substantial frame.

By doing this, the finished window unit becomes stronger and structurally sounder than when constructing with individual window frames.

The Mullion, or metal horizontal or vertical division between windows, is often used to connect the units together to form the larger window assembly.

In order for the milled window frames to fit properly, measurement must be taken that match up precisely for both size as well as shape of each window structure/frame.

Window mulling also helps strengthen insulation from outdoor weather conditions such as rain and wind by forming an extra layer of protection around each connecting joint where windows meet.

Can All Windows Be Mulled?

No, not all windows can be mulled. Mulling is the process of unifying two window frames as one by using a single head jamb and overlapping jamb extensions, often referred to as a “mullion.”

This process is usually only possible with casement or double-hung windows, not other types such as sliding windows, bay windows, round windows, or hopper windows.

Additionally, since mulling involves the frames of both windows overlapping each other, it can’t be done for any size window; the two window sizes must match up exactly in order for mulling to work.

Are Mulled Windows Strong?

While mulling enhances the view while preserving the stability of your home and improves the performance of your windows, the rating of mulled windows may not be as high as the rating of each individual unit.

What Are The Benefits Of Window Mulling?

Window mulling provides numerous advantages both in terms of energy efficiency and appearance.

  • The combined glass area of two windows allows for more sunlight to enter, making a small room feel more spacious and enhancing the ambiance.
  • This extra light also reduces the need for artificial lighting during the day, thanks to the increased window opening that provides ample natural light.
  • If you have concerns about overheating or excessive heat loss during extreme weather, be mindful of the location and orientation of the mulled window.
  • Additionally, a larger glass surface offers a better view of the surrounding landscape, which has positive effects on both mental health and interior design.
  • Lastly, a mulled window serves as a prominent visual feature that draws attention to the exterior or highlights specific elements of the interior design.

Do Mulled Windows Cost More?

Mullioned windows typically cost more than regular or single unit windows due to the extra work involved in the manufacturing process.

As well as increased labor costs, mullioned windows require specific materials that add to the expense.

The frame and glass panels must be sized perfectly for each window and often need custom fabrication, which drives up the price of production.

A good quality mullioned window may also require additional insulation, which adds to the overall cost of installation.

Ultimately, when considering any type of window replacement, mullioned windows offer a number of features but can come with a higher price tag compared to standard single units.

How Do You Install A Window Mull Bar?

Installing a window mull bar is fairly straightforward.

  • Firstly, measure the area between each window then cut the mull bar to fit accordingly.
  • The mull bar should fit snugly into the opening and have an equal amount of space on either side.
  • Next, attach small mounting clips or hooks that come with the mull bar to each side of the window moulding or trim.
  • Once those are in place, place the mull bar onto the clips or hooks and secure it firmly by screwing it in place.
  • Finally, if you have double hung windows, slip a latch keeper into each side jamb at the bottom of your window and attach loop latches to both sides of your mull bar.

Secure them tightly using screws and you’re done – you now have a secure installation!

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