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sub-floor/underlayment question for Adura Locksolid application.



"sub-floor/underlayment question for Adura Locksolid application.," in the Floor Preparation forum, begins: "I have searched the internet and watched a million youtube videos. However, my question is simple and not too complex. ..."

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Old December 26, 2012, 08:56 PM   #1
Sdh
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sub-floor/underlayment question for Adura Locksolid application.


I have searched the internet and watched a million youtube videos. However, my question is simple and not too complex.

Our subfloor was installed over 20 years ago, I would say not the best job from our subcontractors but eh? Anyways, we purchased underlayment for the sub floor

The question is this: The manufacturer states to use a portland non-shrinking cement. http://www.mannington.com/Residentia...tallation.aspx

Anyway, my question is this. What would be the best prep for this floor? Level sub-floor first then top with under layment (1/4 inch birch 5 ply smooth). We are using a staple gun with staples. Our sub floor is not smooth. It does have some low spots as well.
My concern would be the staples shattering the Portland if applied to the sub-floor, I hope this makes sense.

I have 33 boxes of Adura click vinyl we need to lay soon. I had to stop this project for a few months.

My dh wants to lay the underlayment then adjust to high/low spots? It sounds like it would be the easy plan. LOL

Oh, and we have tried to talk to carpet folks. The people who work for some of the local vendors do not know the difference between a sub floor an a underlayment. This is why I went online...

Thanks in advance! Do note I am gathering information for my diy kitchen/dR and bath project. I am not an expert and would like some opinion from folks who do it for a living.

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Old December 26, 2012, 10:06 PM   #2
Jim McClain
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Fix the most glaring imperfections in the subfloor before installing the underlayment. Sand or grind the high spots and you can use 15 or 30# saturated felt (roofing paper) to raise some of the low spots (sorta like a topographical map, but don't use too many layers). After the underlayment is down, you can finish flattening the floor with a good quality Portland cement patching compound. Use of an additive in the mix will help make it flexible. Using a sealer/primer first will help it stick better.

LockSolid is a floating floor, so some minor imperfections won't be a problem. Follow the instructions carefully and you should be fine.

Jim

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