Patch Hardie Board Cement Fiber Board Siding


Old 01-30-19, 08:08 AM
Thread Starter
Join Date: Sep 2013
Location: USA
Posts: 99
Received 0 Votes on 0 Posts
Patch Hardie Board Cement Fiber Board Siding

Any recommendations to patch up a square hole that was cut around a copper water pipe for hardie board cement fiber board siding?

I patched a golf ball hole in the hardie board before by using foam spray, then cutting it flush and applying bondo over it then painting with sealer primer and exterior paint.

Given that theres a copper pipe in the patch area I'm concerned the foam would expand when shooting it in and end up moving or breaking the copper pipe.

So what else could I use for backing to be able to then bondo over it?
Sponsored Links
Old 01-30-19, 08:46 AM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 23,711
Received 620 Votes on 573 Posts
Spray foam won't hurt a pipe.
Old 01-30-19, 08:47 AM
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 47,642
Received 317 Votes on 281 Posts
How big is the hole compared to the pipe? Low expanding foam might be an option.
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

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: