Skip to main content ↑ ↓
Topic: Filling roof screw holes. (Read 439 times) previous topic - next topic

Filling roof screw holes.

The Kool O Matic is coming off today. Reading Jerry Whitaker's post on the screw holes seems like a lot of work. Is there something in a tube or bottle that would fill the holes with a product similar to gelcoat? I will check at the boat store later for suggestions from them.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Filling roof screw holes.

Reply #1 –
I fill screw holes with Fiber Teck epoxy and 406 powder and I make it thick almost
like putty.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Filling roof screw holes.

Reply #3 –
I removed old antennas, cable guides, a patch plate,luggage rack, and filled 111 holes!

I used fiberglass body filler with good results.  No doubt the other products would be as good or better.

For a quick and easy, I would use polyurethane caulk from HD or Lowe's.
Matt B
1998 u-320

Re: Filling roof screw holes.

Reply #4 –
On my last rig I broke up a bunch of toothpicks, rolled them in glue, and then shoved them in the hole and trimmed them to be flush with the wood portion of the roof. Then applied the sealant (epoxy of some sort in your case?) over the top
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: Filling roof screw holes.

Reply #5 –
Just got off the phone with the boat shop. Quarts is the smallest quantity of gelcoat he sells. Suggested 5200 for my issue. There are 50 # 6 screw holes to fill, cosmetics don't matter to me on the roof. I will taper drill to get an area that whatever I use can penetrate. I have bought Bondo in tubes before from auto stores but never used it for this purpose.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Filling roof screw holes.

Reply #6 –
Adhesive caulks come in tubes and work very well
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: Filling roof screw holes.

Reply #7 –
I've used PC11 on my boat with excellent results. Also used it on my Foretravel roof with good results. Two part epoxy rated for below water line use after cured. Can be purchased at many hardware stores. I use two plastic spoons to place it onto mixing surface, then throw them away, blend with putty knife and apply. Also available at Auntie Amazon. PC10 cures a much darker shade. It is drill able.

I've also used 5200.
1998 36 foot U270 Build No. 5328 WTFE, 900 watts solar, Victron controller, B2B, bat monitor, 600 AMPH lithium with 2018 Chevy Colorado toad, SKP #110239, Motorcade #17781, 2021 Escape 17B for when Coach is broken down and campsites are too small, retired and full-timer since Dec. 2020. Part of RV family since 1963.

Re: Filling roof screw holes.

Reply #8 –
To make any patch easier to make "clean", after surface is completely clean get some 2" blue painter's tape.  Use a hole punch to make holes and place the holes in the tape over the roof holes.  Fill with a caulk OR Marinetex (my recommendation).  Just before it hardens, remove the tape if caulk.

If patching with epoxy, Marinetex, etc, leave the tape on until cured. That will leave the patch just slightly proud of the surface (by thickness of the tape). Sand with tape still in place until all the tape is exposed, leaving the patch neat and round.  If really picky, after removing the tape, sand flush with the roof.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Filling roof screw holes.

Reply #9 –
Thanks for the info PC-11 will be here Thu. will use the blue tape suggestion.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Filling roof screw holes.

Reply #10 –
As mentioned above, I'd use 3M 5200 fast cure.  That is wicked stuff.  I've used it in the marine environment, for underwater locations and it's tough stuff.
Keith
2003 U320 38' #6197

Re: Filling roof screw holes.

Reply #11 –
When I removed the old satellite dish, I used Plastic Aide.  It is good stuff. Mix in a little cup, them pour into the hole. You can sand and paint if preferred.  It is an off white color.  Works good on any plastic, fiberglass, pvc, etc.

Waterproof Plastic Repair Kits Fixes cracked ABS PVC Acrylic Wood More
Mark & Bev
2001 U295 36' Slide
Cummins ISC 8.3 350HP
Build #5802
Jeep Wrangler Toad

Re: Filling roof screw holes.

Reply #12 –
I find 5200 very difficult to work with.  So sticky that it is hard to smooth out. 
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020