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Old 05-24-2012, 01:05 PM   #1
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sealing edges of subfloor


I had this question in another area but not getting any responses so trying it in this section of the list.

I'm reflooring an entire 1995 mobile, taking out the particle board room by room and replacing it with 3/4" Top Notch.

I did a small test room in the laundry area because that particle board was a mess of soppy goop. Lifting the subfloor brought another problem to the forefront. RATS! Not here now, thank God but both the heating ducts and the insulation under the trailer show signs of rats so we want to replace both.

In the process of removing the particle board in the laundry room I pulled the insulation and now we realized we have a nice breeze blowing in around the new subfloor I laid. The warm weather is already here so we're going to wait and re-insulate closer to fall when our budget will be somewhat recovered from all this.

How do we seal those edges of the subfloor? Even after the new insulation goes in I think it will be important to have some form of seal to prevent heat loss or insulation fibers drifting in to the house.

Any advice?

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Old 05-27-2012, 12:55 AM   #2
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sealing edges of subfloor


hmm .. lots of view but no advice ???

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Old 05-27-2012, 08:07 AM   #3
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sealing edges of subfloor


pics ? i am thinking spray foam.
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Old 05-27-2012, 08:18 AM   #4
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sealing edges of subfloor


Pictures of the area(s) in question always help us help you.
How large are the gaps?

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Old 05-27-2012, 09:31 AM   #5
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sealing edges of subfloor


How are you cutting out that subflooring?
You should be using a Tow kick saw and an ossilating saw so it can be cut tight to the wall.
Anyplace the new subflooring meets a wall, use blocking out of 2 X 4's or 2 X 6's laying flat. That will support the flooring and cover up the gaps.
You are using constrution adhesive on top of the floor joist, right?

A simple bead of silicone caulking will seal up any small gaps along the outside walls.
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Old 05-27-2012, 10:05 AM   #6
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sealing edges of subfloor


Quote:
Originally Posted by joecaption View Post
How are you cutting out that subflooring?
You should be using a Tow kick saw and an ossilating saw so it can be cut tight to the wall.
Anyplace the new subflooring meets a wall, use blocking out of 2 X 4's or 2 X 6's laying flat. That will support the flooring and cover up the gaps.
You are using constrution adhesive on top of the floor joist, right?

A simple bead of silicone caulking will seal up any small gaps along the outside walls.
Thank you every one for your replies. I would appreciate advice so I can fix this before I go any further.

Yes, I used a toekick saw, tight to the walls and adhesive along the joists.

Along the inner wall that ran parallel to the joists I screwed pieces of 2x4 from the last joist in my room to the joist beyond the wall to support the subfloor along that wall. Along the outer wall that ran parallel to the joists I just screwed a 6' long 2x4 to the outer joist (the room was 5'8" so the additional board extends past the corners of the room a few inches on each side).

Along 3 walls where the joists or my support pieces are perpendicular to the walls there is a "draft" gap between each joist. Does that make sense? Is that where I'm supposed to put additional 2x4's or 2x6's?

The pictures don't show much .. the small gap is less than 1/4" and that's around most of the room. The larger gap is the doorway to the next room that will get filled when I do the floor in the next room.
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sealing edges of subfloor-img_0611.jpg   sealing edges of subfloor-img_0610.jpg  


Last edited by MzMolly65; 05-27-2012 at 10:15 AM.
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