How to Frame a Window: Tutorials + Tips for DIY Window Casings

The Best Tutorials and Resource to Help You Trim Your Windows via #AllThingsWindows #DIY #moulding

Trimming out your windows is one of the top ways to take a builder-grade home and make each room shine with character. Choose your lumber and mouldings to fit your style, and BAM, you’ve got a custom awesome architectural feature in your home.We’ve collected the best tutorials and tips for installing window casings, even for special window situations like arched windows and double windows.

Read all the window trimming tips from some of our favorite DIYers below and then come back later today for more All Things Windows goodness (see everything so far here). (And you can share your projects using #AllThingsWindows on social media and link up your window-related blog posts or Instagram photos at the party, too!)


DIY Window Casing Tips + Tutorials

First: head over to This Old House and read this awesome article that tells you all the terminology about what is what in window trim. Very informative!This Old Home window trim guide via Remodelaholic


Over at Pretty Handy Girl, Cristina from Remodelando la Casa has a thorough and detailed window casing tutorial to get your from start to finish — how to remove a window sill, install a new one, and trim the window for a full makeover.  Remodelando La Casa on Pretty Handy Girl window trim tutorial via Remodelaholic


Ashley from Make It and Love It also shared a great informative tutorial about how she (a self-proclaimed DIY rookie) replaced window sills and trimmed her windows.  Make It and Love It how to trim a window and replace the sill via Remodelaholic

If you’re looking for an easy carved moulding style trim, check out this tutorial by Ana White.

Ana White easiest way to trim windows via Remodelaholic

Or if you’re in the market for the craftsman look, The DIY Mommy shares the tutorial for how she did a super easy craftsman-style trim (by herself!) — just 4 pieces for each window!

The DIY Mommy super simple craftsman window trim tutorial via Remodelaholic


Over at Teal and Lime, our very own Kayla and Justin from Home Coming shared all their carpenter’s tips for installing a craftsman style window trimHome Coming on Teal and Lime carpenter tips for installing window trim via Remodelaholic

Donna from Funky Junk Interiors also used a craftsman style window trim in her home, but she used regular flat lumber (not crown moulding) to create the stacked crown on top.

Funky Junk Interiors craftsman style window trim using flat lumber and not moulding via Remodelaholic

Sarah (aka Thrifty Decor Chic) shows you how she added window trim and updated her chair rail to have a seamless transition from window casing to existing wainscoting.

Thrifty Decor Chick how to trim windows to match chair rail wainscoting via Remodelaholic

Jill from The Rozy Home shared here on Remodelaholic how she took her entryway style up a notch by trimming out her arched windows.

The Rozy Home on Remodelaholic how to trim arched windows via Remodelaholic

Visit Thistlewood Farms to see how KariAnne used plywood to save money while adding height to her farmhouse windows.

Thistlewood Farms inexpensive way to add height to window frames via Remodelaholic

If you’ve got a set of windows to trim, head over to Remodelando la Casa to see how Cristina installed trim on her double window.

Remodelando La Casa how to trim double windows via Remodelaholic

Brittany, the amazing Pretty Handy Girl, shows you how to frame a casement (hinged) window.

Pretty Handy Girl how to frame a casement hinged window via Remodelaholic

Phew. There ya go. I’m breaking a sweat just thinking about all the measuring, but the work of framing windows is totally worth it!

UPDATE: In response to a question from Melissa, we also want to add this awesome tip from House of Hepworths: how to add window trim to a rounded corner.

House of Hepworths - how to trim a rounded corner via @Remodelaholic

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Lorene has been behind the scenes here at Remodelaholic for more than a decade! She believes that planning projects and actually completing them are two different hobbies, but that doesn't stop her from planning at least a dozen projects at any given time. She spends her free time creating memories with her husband and 5 kids, traveling as far as she can afford, and partaking of books in any form available.

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  1. inspiration hit like a bolt of lightening on trimming out my bay windows. Have totally been stumped by all of the you tube explanations for the compound miters on the header. Hoping that I will receive some simplified guidance for overcoming this huge obstacle. Sigh.