How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Mr. Mike Your Own Question

Mr. Mike
Mr. Mike, Civil Engineer
Category: Home Improvement
Satisfied Customers: 1387
Experience:  Homeowner and fixit fan. What works is what I am interested in.
2837397
Type Your Home Improvement Question Here...
Mr. Mike is online now
A new question is answered every 9 seconds

Can I use roofing felt under laminate flooring, over wood flooring

Resolved Question:

I am putting it in a manufactured home. I will be gluing laminate in water areas and entry ways. I bought the flooring at an auction, so warranty isn't an issue, but wear is.
Submitted: 7 years ago.
Category: Home Improvement
Expert:  Mr. Mike replied 7 years ago.
Thanks for requesting me.

I know of one small theatre stage that used roofing felt under their final wood stage, on top of a plywood subfloor. They liked the feel of the stage floor once it was finished. There was little likelihood of water soaking into the roofing felt, so that wasn't an issue.

Another person's advice says this about roofing felt over wood and under a floor:

"...Can I install flooring over the concrete floor in my basement?

Basement floors are notorious for becoming damp, and moisture will ruin a floor unless necessary precautions are taken. But once these are done, you can put down many types of flooring, including vinyl, ceramic tile, engineered hardwoods, laminates, or carpet. Flooring experts generally recommend against installing traditional strip or plank hardwoods below grade. Engineered or laminate flooring is a better choice in this case.

    * Woods: The ideal way to put down a wood floor over concrete that is subject to dampness is to first put down pressure 2-by-4 inch "sleepers," or lengths of wood, on the floor that are spaced 16 inches apart on center. Cover the sleepers with 6-millimeter plastic and then lay down 5/8-inch plywood. **** Cover the plywood with 15-pound roofing felt, and then install the engineered or laminate floor. **** Engineered wood floors may be nailed or glued to the plywood subfloor. Laminate floors, which may be tongue and groove or snap-together, are "floating" floors and not attached to the subfloor. If the concrete subfloor is always dry, however, engineered and laminate floors can be placed directly on the slab.
    * Carpet: Carpet can be laid in the same manner.
    * Vinyl tile: For vinyl tile, skip the 15-pound felt and apply mastic directly to the plywood.
    * Ceramic tile: For ceramic tile, nail cement boards to the..."

[I added the "****" to show the specific location where your question is specifically addressed)

Source: http://www.improvenet.com/Homeowner/adviceandresources/messageboard/questions/flooring.html

I would add some cautionary notes, though.

The roofing felt has to be placed almost perfectly, uniformly flat, and kept flat during installation of the laminate. This is because it will "give" over time, and then the surface of the laminate will "give" as well, leaving high spots where differential wear will occur.

If water gets under your laminate once the installation is complete, especially around the edges, the roofing felt may swell a little where damp, hold the moisture, "squish" if you walk on it... even if you don't get mold you could get "differential squishing" leading again to high spots. Be sure to fully cover your areas and seal to prevent water soaking in from the top. Water can be "wicked" in by wood trim so don't leave any standing water on the floors.

But if it works in damp basements, with those precautions it will work as well in your manufactured home.
Mr. Mike, Civil Engineer
Category: Home Improvement
Satisfied Customers: 1387
Experience: Homeowner and fixit fan. What works is what I am interested in.
Mr. Mike and 8 other Home Improvement Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
< Last | Next >
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
  • Thank you for the expeditious answer. It's good to know you're out there and awake in the wee hours when I finally have time to ask questions about my Jenn Air. Jean Riverhead, NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
 
 
 

Meet The Experts:

 
 
 
  • The Home Smithy

    Home Builder

    Satisfied Customers:

    2002
    #1 Home Improvement Expert 30+ years experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/TH/TheHomeSmithy/2011-8-13_11146_homesmithy.500x500.64x64.jpg The Home Smithy's Avatar

    The Home Smithy

    Home Builder

    Satisfied Customers:

    2002
    #1 Home Improvement Expert 30+ years experience
  • http://ww2.justanswer.com/uploads/BS/bshull17/2011-2-11_04125_japic.64x64.JPG Brian's Avatar

    Brian

    Architect

    Satisfied Customers:

    1967
    Licensed Architect- 16 years, L.E.E.D. AP
  • http://ww2.justanswer.com/uploads/ST/Steve555/2013-6-14_144343_Depositphotos4247517S.64x64.jpg Steve G.'s Avatar

    Steve G.

    Handyman

    Satisfied Customers:

    135
    VP of electronic repair company and home theater advisor.
  • http://ww2.justanswer.com/uploads/ER/Erdaram/2011-6-21_14724_ANIEric4Pics.64x64.gif Eric M. Bright's Avatar

    Eric M. Bright

    We Don't Comprehend the Word Can't!

    Satisfied Customers:

    1734
    I've been been doing things for my clients that others have said cant be done for over a 1/4 Century
  • http://ww2.justanswer.com/uploads/rich03dungo/2010-3-17_101556_tshirt2.jpg Rich's Avatar

    Rich

    Home Improvement Enthusiast

    Satisfied Customers:

    674
    Over 35 years construction and home maintenance experience
  • http://ww2.justanswer.com/uploads/AL/alumalite/2012-5-10_234018_shutterstock506249951forJA500.64x64.jpg Phil's Avatar

    Phil

    Mechanical Engineer

    Satisfied Customers:

    409
    Retired contractor, 51 years experience
  • http://ww2.justanswer.com/uploads/JE/jerrymassie/2011-1-15_45937_1111055.64x64.JPG Jerry's Avatar

    Jerry

    hearth products

    Satisfied Customers:

    317
    owned and operated stove retail and service 12 yrs