Drilling hole in fiberglass - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-08-2019, 03:25 PM   #1
Junior Member
 
Name: Lyndaleen
Trailer: Hunter Compact Jr
California
Posts: 26
Drilling hole in fiberglass

How do you mount something like a rock guard when the only thing to screw into is fiberglass? If I drill a hole in the fiberglass and bolt a bracket, what kind of drill bit? Or, is it better to use something like gorilla glue to glue a bracket to mount the rock guard?
__________________

Lyndaleen is offline   Reply With Quote
Old 06-08-2019, 03:41 PM   #2
Moderator
 
Jim Bennett's Avatar
 
Name: Jim
Trailer: 2017 Escape 5.0 TA
Alberta
Posts: 5,650
Registry
Rivets will do the job nice. Just use large washers on them.
__________________

__________________
2017 Escape 5.0 TA
2015 Ford F150 Lariat 3.5L EcoBoost
2009 Escape 19 (previous)
“Most folks are about as happy as they make up their minds to be.” — Abraham Lincoln
Jim Bennett is online now   Reply With Quote
Old 06-08-2019, 03:43 PM   #3
Senior Member
 
Name: Greg
Trailer: 2008 Casita 17 SD
Washington
Posts: 1,448
Registry
I wouldn't trust any type of glue or adhesive to hold something like that. As for drilling holes, any appropriately sized standard twist drill bit will make a hole in fiberglass. If you do, you want to be sure to seal the rivet, screw, or other fastener with a good grade of marine sealant. Just squeeze a dab right into the hole before you attach your fasteners.

A lot of people have an aversion to making new holes in their trailers, but if done right, they are fine. If you take a walk around your trailer I'm sure you'll see about a hundred holes already existing. Windows, doors, hatches, vents, drains, propane gas piping, gazillions of rivets, fans, air conditioning units, etc. If you're not worried about them, why worry about a few more holes...
Casita Greg is offline   Reply With Quote
Old 06-08-2019, 04:06 PM   #4
Junior Member
 
Name: Lyndaleen
Trailer: Hunter Compact Jr
California
Posts: 26
Quote:
Originally Posted by Jim Bennett View Post
Rivets will do the job nice. Just use large washers on them.
I hadn't thought about the washers; good advice. Thanks
Lyndaleen is offline   Reply With Quote
Old 06-08-2019, 04:10 PM   #5
Junior Member
 
Name: Lyndaleen
Trailer: Hunter Compact Jr
California
Posts: 26
Quote:
Originally Posted by Casita Greg View Post
I wouldn't trust any type of glue or adhesive to hold something like that. As for drilling holes, any appropriately sized standard twist drill bit will make a hole in fiberglass. If you do, you want to be sure to seal the rivet, screw, or other fastener with a good grade of marine sealant. Just squeeze a dab right into the hole before you attach your fasteners.

A lot of people have an aversion to making new holes in their trailers, but if done right, they are fine. If you take a walk around your trailer I'm sure you'll see about a hundred holes already existing. Windows, doors, hatches, vents, drains, propane gas piping, gazillions of rivets, fans, air conditioning units, etc. If you're not worried about them, why worry about a few more holes...
Great advice! I forgot about marine supplies, like the sealant, being appropriate for fixes. And, I hadn't even realized the windows were holes; my shame. Thanks!
Lyndaleen is offline   Reply With Quote
Old 06-08-2019, 04:37 PM   #6
Senior Member
 
Glenn Baglo's Avatar
 
Name: Glenn ( second 'n' is silent )
Trailer: 2009 Escape 17B '08 RAV4 SPORT V6
British Columbia
Posts: 6,609
Quote:
Originally Posted by Lyndaleen View Post
I hadn't thought about the washers; good advice. Thanks

You'll find packages of rivet washers next to the rivets.
__________________
What happens to the hole when the cheese is gone?
- Bertolt Brecht
Glenn Baglo is offline   Reply With Quote
Old 06-08-2019, 05:45 PM   #7
Junior Member
 
Name: Lyndaleen
Trailer: Hunter Compact Jr
California
Posts: 26
Quote:
Originally Posted by Glenn Baglo View Post
You'll find packages of rivet washers next to the rivets.

Oh, thank you!! I'm new to all of this. Right now, my focus is on legalities, safety, and strength of all my additions. THEN, I might consider cosmetics.
Lyndaleen is offline   Reply With Quote
Old 06-08-2019, 08:03 PM   #8
Senior Member
 
Name: K C
Trailer: 1971 Trailswest Campster
Washington
Posts: 2,704
Quote:
Originally Posted by Lyndaleen View Post
Oh, thank you!! I'm new to all of this. Right now, my focus is on legalities, safety, and strength of all my additions. THEN, I might consider cosmetics.
In my opinion all additions and modifications should have the consideration of making them have a neat, tidy and attractive appearance. To do anything less is going to be bringing down the value of the value of the trailer as well as your self esteem boost that comes with doing excellent all around work.


In other words cosmetics are important and should not be last on the list of considerations, they are simply part of the whole package of making, modifying and fixing.
k corbin is offline   Reply With Quote
Old 06-09-2019, 04:22 PM   #9
Senior Member
 
Name: Mike
Trailer: !977 KingsleyGMC, 1968 Bailey Mikado
Nova Scotia
Posts: 114
Quote:
Originally Posted by Glenn Baglo View Post
You'll find packages of rivet washers next to the rivets.

Use stainless steel to prevent rust stains.
panhead_mike is offline   Reply With Quote
Old 06-09-2019, 06:56 PM   #10
Junior Member
 
Name: Lyndaleen
Trailer: Hunter Compact Jr
California
Posts: 26
Quote:
Originally Posted by panhead_mike View Post
Use stainless steel to prevent rust stains.
Good advice!
Lyndaleen is offline   Reply With Quote
Old 06-09-2019, 09:57 PM   #11
Senior Member
 
Raspy's Avatar
 
Name: John
Trailer: Black Series HQ19 on order
Smith Valley, Nevada
Posts: 1,822
Quote:
Originally Posted by Lyndaleen View Post
THEN, I might consider cosmetics.
Trouble is, cosmetics are what you see when done, and you can't change it afterward. Any project needs to be done carefully and thought through before starting. A little care goes a long way in making the final product pleasing.

It's so satisfying to upgrade the trailer and then go on a trip where you have time to enjoy it. I get a lot of pleasure out of much simpler things when camping.
__________________
I only exaggerate enough to compensate for being taken with a grain of salt.
Raspy is offline   Reply With Quote
Old 06-10-2019, 02:00 AM   #12
Senior Member
 
Name: Lee
Trailer: Casita
Texas
Posts: 408
Registry
Heres a link on Amazon to what they call exploding head rivets that spread out more than regular rivets. Not sure if they have differant colors. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 The rivet kit that can be ordered from Little House Customs also includes some of those "exploding head" type rivtets.
__________________
Lee
Captleemo is offline   Reply With Quote
Old 06-10-2019, 02:55 PM   #13
Junior Member
 
Trailer: No Trailer Yet
Posts: 21
Amazons exploding rivets come in 13 different colors. Great tip!
Bing M. is offline   Reply With Quote
Old 06-15-2019, 12:29 PM   #14
Member
 
Trailer: Casita 16 ft
Texas
Posts: 40
Driling in FG

If your trailer has the "rat fur" on the other side, the drill bit will catch on the threads and pull out a lot of thread, making an unsightly streak on the other side.

Once the bit is just about through, stick a wire through the small hole in the center. Go to the other side and use a rotating punch tool to cut a hole in the carpet where the wire is sticking through. Then finish drilling the hole from the inside.

Instead of using washers for backup, a small wood strip can work, if you have several screws in a row.
Friz is offline   Reply With Quote
Old 06-15-2019, 01:58 PM   #15
Member
 
Name: Chris
Trailer: Scamp
MN
Posts: 35
I'm sure many will disagree, but the advancements with adhesives and high bond tapes the last few years has been remarkable. 3M's VHB, 4950 and similar will hold stronger in many cases than the actual fiberglass it is attached too. There are many RV'ers rolling around and reporting on various forums with full Solar Panels attached on the rood with the stuff. And that's probably the most the extreme use, since those panels are constantly getting updraft wind pressure and full sun exposure. I would have no problems using the stuff on a rock shield since all that wind will be blasting directly on the front. But it all comes down to how well you prep the surface.
XBeatzX is offline   Reply With Quote
Old 06-15-2019, 02:58 PM   #16
Junior Member
 
Name: Anthony
Trailer: In the market
California
Posts: 20
Adhesive to mount things to fiberglass

I would use a good brand of epoxy and no rigid fasteners like screws or rivets. The reason being that if a serious impact happens it won't wreck your fiberglass substrate, but the adhesive is likely to tear free without doing too much damage. I'd rather have the attachment fail than the hull. Just a thought.
Yellowjacket is offline   Reply With Quote
Old 06-15-2019, 07:21 PM   #17
Junior Member
 
Name: kenneth
Trailer: x
Georgia
Posts: 11
Riveting into fiberglass

You may want to search good ol' youtube for how to rivet into fiberglass. Here's one to get you started:
McKannick is offline   Reply With Quote
Old 06-15-2019, 07:34 PM   #18
Junior Member
 
Name: kenneth
Trailer: x
Georgia
Posts: 11
Riveting into fiberglass

This post might be repeated, cus the 'moderator' had to inspect the video link I put in previously about using special rivets when dealing with fiberglass. So, let's do it the hard way and just have you search youtube for 'how to rivet into fiberglass' and you'll find the usual bunch of vids to do what you need to do.
McKannick is offline   Reply With Quote
Old 06-15-2019, 10:20 PM   #19
Member
 
Name: Alan
Trailer: 1983 Casita & 1972 home-built
Oregon
Posts: 58
Backing plates like washers distribute the stress of the load on the fastener to a larger total area of fiberglass, hopefully enough to prevent fastener pull-through.


Fender washers are available in sizes from 1/2" to 1 1/2" Outside Diameter with any hole size you need. A fastener store should have a good selection. A bendable piece of sheet metal, or polyethylene sheet, or plywood can also be used to back up several bolts or rivets.



Choose your metals carefully, since common hardware store fasteners and trailer parts can end up corroding each other; here is a chart: https://www.engineersedge.com/galvanic_capatability.htm


If you really need a lot more strength to support a load on the shell or repair stripped holes, or dampen vibration, you can always add more laminations of fiberglass to beef up the area. This can include encasing a plywood backing plate in fiberglass to keep it in place and keep water out of it.
ARVZ is offline   Reply With Quote
Old 06-16-2019, 09:57 AM   #20
Member
 
Nevada
Posts: 44
Registry
Quote:
Originally Posted by panhead_mike View Post
Use stainless steel to prevent rust stains.
All the rivets in my Casita are aluminum, including those installed in the factory. I would certainly stay away from carbon steel or galvanized rivets. Also the tech at Casita advised me not to use screws as they can cause the fiberglass to crack. Dow silicone (RTV) is an excellent sealant and can be found at any hardware store.
__________________

egfasdsdsz is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Does drilling a hole compromise the integrity of fiberglass? Missouri Mark Modifications, Alterations and Updates 7 06-10-2019 07:26 AM
Mounting things on roof w/o drilling a hole stev Modifications, Alterations and Updates 26 10-21-2012 01:59 PM
Tips for Drilling Holes in Fiberglass Lil M. Modifications, Alterations and Updates 33 08-17-2012 05:46 AM
Drilling into Fiberglass with a hole saw. WARNING freddo411 Problem Solving | Owners Helping Owners 8 05-05-2012 09:41 PM
Drilling hole in UHaul floor - sealing Thomas G. Modifications, Alterations and Updates 4 12-22-2011 06:21 AM

» Upcoming Events
No events scheduled in
the next 465 days.
» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 09:27 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
×