Front and Back Windows

My Opening

• 19 1/4" - 19 1/2"  x  43 3/4"

Windows Size Based on Opening

• Height: 19.5 - 0.5 = 19"
• Width: 43.75 - 0.5 =43 1/4"

My Old Windows

• 18 3/4" x 43 1/8" 
• 3" radius corners

Window Size Based on Old Window

• Height: 18 3/4" + 1/8" = 18 7/8" 
• Width: 43 1/8" + 1/8" = 43 1/4" 

Maybe:

• Height: 19"
• Width: 43 1/2"

Web: 19" x 43 1/8"

*Please note– if using this one-piece gasket to replace an original two-piece gasket (locking strip down the middle), and using the original window as a template- the new windows should be cut larger as the new gasket is smaller. The centre web on the LK987 is 0.265″. A rule of thumb is to cut the new window an 1/8″ larger in height and length (1/16″ all around) than the original. Or follow this method:

• Hold the new window, or something for a template, over the window opening from the outside and have someone trace around the window opening from the inside.
• Mark the top, bottom and left and right sides as the opening may not be cut even.
• Using this line, draw another line 1/4″ around the inside, then use this line to cut the new window. When cutting make sure to cut on the edge of the line and when installing make sure the orientation is correct.
• Repeat process for second window if applicable.

What Worked for Me

My attempt with a window 1/8" increase in height and width didn't work. I ended up cutting the new window to the same size as the original.

I installed the gasket on the opening and then pried it in using some plastic pry tools spraying copious amounts of soapy water during the process.

I used the SELF Locking Rubber Gasket Tool to close the locking strip. Again with lots of soapy water.

Tools Used:

CRL Tapered End Windshield Stick Setting Tool

Lisle Corp - SELF Locking Rubber Gasket Tool

Other Installation Solutions

Boler Window Replacement

https://www.youtube.com/watch?v=yn6cuVMNOKY

Rope Trick:

https://www.fiberglassrv.com/threads/installing-boler-front-rear-windows.1143467/#:~:text=Try%20this:-,1.,lip%20pulls%20into%20the%20trailer.

1. Install the new gasket around the glass.
2. Get some 3/8" nylon clothesline/rope
3. Tuck the rope into the channel of the gasket where the window frame will go. Go all the way around to overlap and tape the loose ends up against the inside middle of the glass (top or bottom) with some masking tape.
4. Have a helper align the glass against the opening from the outside.
5. Get in the trailer and SLOWLY pull the rope out as the lip pulls into the trailer.

A little liquid soap makes things go easier. It takes about a minute.

Then you can do the lockstrip. Although some people cheat and install that first.

** How To Rope-In Back Window Glass Gasket 

Jalousie Window

** My Trillium Fix | E6: cleaning jalousie windows | similar to Scamp & Casita Fiberglass RV trailers

https://www.youtube.com/watch?v=KEefX9kI8FU&t=758s

Seals

Door Window

How to Rebuild, Restore, and Repair Hehr Standard Windows

https://www.youtube.com/watch?v=03d-L2ev5E8

Seals

Other

Suppliers

References