Window's vs wall thickness.

[Rbob]

When I ordered windows. Motion Windows asks for wall thickness so trim ring can match +/- 1/16"  Fair enough, my walls are 1/2" - 9/16" thick so I ordered the 1/2" spec'd trim rings.

What I learned today.

1.  The foam tape provided to install is 1/8" thick and I would have added it to the wall thickness when ordering if I had hind sight.

2.  I have not tighted up my screws yet because I dont want to deform the trim ring.

3.  I will need longer screws than what was provided If I add a spacer to take up the gap.



I am curious what others have experienced.

Pics later.

[Brian.Dixon]

Before you finalize, check in with Wynne Windows installation instructions.  Rather than 1/8" thick foam, I believe they recommend a polysulfide caulk (can be removed later) ... apply the caulk, install the windows, tighten to 'close' to final tightness, clean up any squeeze-out, let cure, then finish tightening.  This may resolve the screw length issue.  In any case, explore around a bit on how clamp-in windows get installed ... I'd call Wynne tech support to verify what I say (I might be wrong on which company suggested installing this way).

[Todd j]

I just asked motion window this very question.   They instructed me to use 3M 4200.  I know we discussed this before the windows were ordered.  Fwiw I did not use any gasket

[Brian.Dixon]

I think the 3M 4200 is the 'quick' version of 3M 5200, right? 

The sealants that I was thinking of are the SikaFlex sealants - hardware can be removed by slicing the sealant around the perimeter and prying (You might break a window someday):

SikaFlex-591 General Purpose Marine Sealant

SikaFlex Marine Applications Sealants (including teak and specialties)

[Todd j]

5200 aka Satan’s glue.  Permanent!
4200 quick and is “semi permanent”.  I farted around some while installing.   There is plenty of open time with 4200.  If you use it don’t use alcohol to clean.   I used a squared off tongue depressor to scoop/scrape squeeze out.  Acetone to clean it up.  I didn’t notice any damage to the Alexseal.   I tried to mask the opening also and it didn’t work any better for me

[Brian.Dixon]

Good to know about the 4200.  Sounds like a better choice.  I also remembered Life Caulk by BoatLIFE ... it's pretty good too.

Life Caulk

[sprig1]

Just to add fuel to the fire. I thought it was 4000uv to bed windows and such.

[Todd j]

Fuel away.

[Brian.Dixon]

Awesome ... let us know how it goes, tips and tricks, and how you like it

[Todd j]

It doesn’t cure hard as a rock.  It stays squishy,  but firm.  I used it on everything.  It leaves a film behind after acetone clean up, but not like silicone.  You can scrub it off.  It’s kinda messy and really hard to tool. Definitely use lint free rag.  Not a shop towel, or cheap rags from the auto parts store. The color bleeds out and they usually have some solvent/s residue in them.  I did all 10 windows and other miscellaneous stuff.  Wasted a lot through squeeze out and still have a tiny squirt left in the last tube.

[Brian.Dixon]

It doesn’t cure hard as a rock.  It stays squishy,  but firm.  I used it on everything.  It leaves a film behind after acetone clean up, but not like silicone.  You can scrub it off.  It’s kinda messy and really hard to tool. Definitely use lint free rag.  Not a shop towel, or cheap rags from the auto parts store. The color bleeds out and they usually have some solvent/s residue in them.  I did all 10 windows and other miscellaneous stuff.  Wasted a lot through squeeze out and still have a tiny squirt left in the last tube.

One thing I like about 4200/5200 is that they swell up when exposed to moisture.  In other words, they're non-shrinking on sunny days and swell up to create an even better seal when it's wet or rainy

[Grady300]

I used 4200 on all my windows, worked fantastic

[tom e]

For the Motion windows, we used the foam tape that they sent. No problems.  For Wynne, they told us to use 4200, which we did.  No problems there, except that between the initial test fit and installation, we had added two coats of primer and two of top coat.  So, we had to go back and do a bit of sanding.  Our bad.

[Easygoing]

Is butyl tape around windows a thing of the past now?  I was planning to go that direction...

[Rbob]

RE: Butyl tape.

What type of windows are you planning on to install?  Butyl has been used to install car windows for 50 years give or take.