Simple trick to Exterior Insulation and Window Depth

Using Exterior Insulation on a Window without adding the thickness, Matt explains how Roxul helps achieve this detail.

[MarkGoergen-np]

Matt, watching your videos has completely changed the way we are renovating our house. We have a craftsman/Victorian house in East Aurora, NY that was built in 1890, reportedly by a retired Pony Express rider. It leaks air like a sieve and looks beautiful, but has serious issues, including severed joists and crumbling plaster. Because of damage to the siding, we decided to tackle siding replacement next in our renovation schedule. I've done a lot of research and have watched about 150 of your videos. I've incorporated your methods and materials into every part of the project. We are tearing off the vinyl siding, shake siding under that, a layer of older siding and sheathing made of 1x2s, along with multiple layers of tar paper, very thin foam board and just paper. We are rebuilding from scratch, starting with Rockwool bats between the studs, where there is little to no insulation. It isn't often we get to insulate the inside from the outside this easily! We went with Zip system sheathing, using Zip tape on the main seams and Zip Liquidflash on the nail intrusions and tricky parts. We have 46 windows to replace and are and installing them with some of the fantastic methods and materials you've introduced. Because there was almost 2 inches of old siding, we have room for 2 inches of exterior Rockwool board insulation. We will top that off with a 3/8" rain screen before installing the cladding. We will be able to reroute a number of the penetrations and will use tape and Liquidflash to seal all of the remaining ones. All told, we will take walls with an R-value under 10 to about 25, and will have a wonderfully sealed envelope. I'm looking forward to seeing next winter's heating bills. Thank you for all the great information you have provided!

[tzimme]

Please do a whole video on bending and installing. I want to get my roofer to do this in the next few months. Love your videos

[wvenn]

I just used this method on my own home, worked great! It serves to keep the insulation below the window dry too. I also used the scraps to frame a telephone access box and a heavy-duty outlet box that I didn't want to try to build out.

[cmm]

Brilliant solution!! Thank you, sincerely, to you Matt and to your team!!!

[alteragnostik]

Would love to see the process of putting finish surface (shingles or siding probably) on that thick roxul walls. Would appreciate a lot that video. Thank you Matt!

[thedge]

More details on the window extension would have been nice. Such as how the corners are connected?

[larrybustamante]

As always, Great informational videos. Thank you and keep them coming.

[bernarrcoletta]

Matt, you read my mind. After I watched the last video on the rock insulation, I was wondering how you finished the window. Nice job!

[nextdevelopments]

Love your work Matt. Can we talk about how you would fix cladding over that Roxul? I get how stone would work (maybe some ties back to the frame?) but how can I clad this with weatherboards or light weigh sheeting? Cheers!

[robottrainer]

much appreciate the video, would love to see a video solely on weatherproofing the window flashing from drop edge, to bent bottom setup.

[screaminpotato]

It exterior insulation becomes more popular I would think the Window manufacturers will simply extend their windows to account for the thickness.

[frankie]

Love to see the super detail: did you attach siding directly to roxul or use furing strips, etc.  Thanks

[TheSkotgarrett]

Matt, love the videos. I have learned so much from them. With all the talk about the benefits of exterior insulation and the perfect wall system…would it be possible to do exterior insulation on a post frame home or barndo? The kind of homes your buddy at RR does.

[seank]

What happens when you have to replace the window? You have to rip everything out back to the sheathing. I would prefer having the window set into stops in the window buck itself, so you never have to disturb the siding and the exterior insulation when it comes time to replace the window.

[rogerwhiting]

I have built one home in Massachusetts and I am currently building 2 more. I really enjoy new advances in energy efficiency. One of the things that i discovered is what I call "aluminum bubble wrap" It seems like the PERFECT insulation.... very thin, bugs dont like it, no degradation over time, inexpensive, hydrpphobic, etc. What about either wrapping the INTERIOR studs just below the sheetrock? You can aluminum tape the seams and edges. All the same insulation can go in the stud bays and you dont have to make any accommodations for it. I would love to get some constructive feedback about this please. Thanks

[ReliableMadison]

Love this slim window buck flashing. We're doing this on our new addition. Seems like butting the siding up to the flashing (no tradtitional window trim) would be faster, cheaper and more sustainable. Except for aesthetics and style, has tradition widow trim finally become obselete? Thanks for the tip!

[CharlieH_design]

How are you detailing the bottom of the wall. Are you flashing the bottom like the window? How do you deal with the 2" Roxul + exterior finish termination? (Might be a good video) Thanks for all the great info.

[Joineryinstructor]

Don’t know some of the complaints. Yep videos have sponsors. Cladding attached to strapping as stated in Video. Flashing bent and stalled bottom up corner joints can be figured out by any good tin bender. Thanks for good video.
MRyan

[haighyvshaighy]

Matt, love your videos! I'm interested on doing this exterior insulation on my garage/ workshop. I'll be building out a shed dormer off my existing gabled roof. My brain is keeping me up at night on how to properly insulate, fir strip and flash the dormer wall along the gabled roof. Any thoughts?

[williammackey]

Another excellent video Matt, thank you. I have the same question about what you do at the stem wall. Do you just leave an overhang sticking out?