Comments on: Can I add a sister beam on the beams supporting a bathtub that has a 1 1/2 ft hole in the plywood next to it? http://www.homeimprovementproducts.net/blog/home-improvement/can-i-add-a-sister-beam-on-the-beams-supporting-a-bathtub-that-has-a-1-12-ft-hole-in-the-plywood-next-to-it/570/ Home improvement products, techniques and ideas Thu, 01 Jul 2010 11:12:08 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: mstrcarp44 http://www.homeimprovementproducts.net/blog/home-improvement/can-i-add-a-sister-beam-on-the-beams-supporting-a-bathtub-that-has-a-1-12-ft-hole-in-the-plywood-next-to-it/570/comment-page-1/#comment-1059 mstrcarp44 Mon, 24 Nov 2008 03:20:25 +0000 http://www.homeimprovementproducts.net/blog/home-improvement/can-i-add-a-sister-beam-on-the-beams-supporting-a-bathtub-that-has-a-1-12-ft-hole-in-the-plywood-next-to-it/570/#comment-1059 Yes you can sister onto the existing joists. Laminate the beams together by glue and ***** method. If there is any dry rot shown, be sure to sister all affected beams. Now from the topside. Dealing with the irregular hole is easier than you might think. Mark this area by finding the joists below, square the hole, cut and remove. Cut a patch using the same dimension (thickness) plywood, apply glue to joist tops, place plywood patch, and fasten with screws. You are now patched, and ready for flooring. If your new flooring requires an underlayment, you can install 1/4" luan sheets for products such as vinyl flooring. (Glued and screwed again) If you have big box stores, or local lumber yards nearby, either one should be able to offer small cutoffs of plywood to fit your need, you wont have to purchase entire sheet. Yes you can sister onto the existing joists. Laminate the beams together by glue and ***** method. If there is any dry rot shown, be sure to sister all affected beams.
Now from the topside. Dealing with the irregular hole is easier than you might think. Mark this area by finding the joists below, square the hole, cut and remove. Cut a patch using the same dimension (thickness) plywood, apply glue to joist tops, place plywood patch, and fasten with screws.
You are now patched, and ready for flooring. If your new flooring requires an underlayment, you can install 1/4″ luan sheets for products such as vinyl flooring. (Glued and screwed again)
If you have big box stores, or local lumber yards nearby, either one should be able to offer small cutoffs of plywood to fit your need, you wont have to purchase entire sheet.

]]> By: Richard H http://www.homeimprovementproducts.net/blog/home-improvement/can-i-add-a-sister-beam-on-the-beams-supporting-a-bathtub-that-has-a-1-12-ft-hole-in-the-plywood-next-to-it/570/comment-page-1/#comment-1058 Richard H Fri, 21 Nov 2008 15:14:55 +0000 http://www.homeimprovementproducts.net/blog/home-improvement/can-i-add-a-sister-beam-on-the-beams-supporting-a-bathtub-that-has-a-1-12-ft-hole-in-the-plywood-next-to-it/570/#comment-1058 Yes you can sister the floor joist. Your on the right track keep going. Yes you can sister the floor joist. Your on the right track keep going.

]]> By: ranger_co_1_75 http://www.homeimprovementproducts.net/blog/home-improvement/can-i-add-a-sister-beam-on-the-beams-supporting-a-bathtub-that-has-a-1-12-ft-hole-in-the-plywood-next-to-it/570/comment-page-1/#comment-1057 ranger_co_1_75 Tue, 18 Nov 2008 12:01:24 +0000 http://www.homeimprovementproducts.net/blog/home-improvement/can-i-add-a-sister-beam-on-the-beams-supporting-a-bathtub-that-has-a-1-12-ft-hole-in-the-plywood-next-to-it/570/#comment-1057 Yes, a sister bean adds additional support, it won't hurt anything having it there. Just make sure it won't interfere with the existing plumbing, tow nail or use metal hangers to secure it to the existing framing. I have found metal hangers and screws are the easiest way to work with old dry hard lumber. Be sure to remove all dry rotted wood from under the tub, or you will just waste your time and money. And be sure to use exterior grade plywood, or it won't hold up to the moisture. Yes, a sister bean adds additional support, it won’t hurt anything having it there. Just make sure it won’t interfere with the existing plumbing, tow nail or use metal hangers to secure it to the existing framing.

I have found metal hangers and screws are the easiest way to work with old dry hard lumber.

Be sure to remove all dry rotted wood from under the tub, or you will just waste your time and money.

And be sure to use exterior grade plywood, or it won’t hold up to the moisture.

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