HOW TO INSTALL A SUBFLOOR ON CONCRETE

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Published 2015-11-30
Tools Required:
- Drill with a hammer setting (SDS drill works best)
- Impact gun and Phillips bit
- 3/16" Concrete bit
- Scissors
- Hammer
- Taping block (scrap piece of 2" x 4")
- Shop vacuum

Materials:
- Delta-FL (105 sq ft roll)
- Landscape Fabric
- 4' x 8' Sheet of 5/8" OSB with tongue and groove
- 100% Clear silicone
- Tuck tape
- 1/4" x 1-3/4" Phillips flat top Tapcon screws (approximately 8 per 4 'x 8' sheet)
Laminate Floor: Life Stepp, country collection, colour: Gray Smoke, Size: 1215x126x12.3mm, SKU # 2717. Each box covers 19.77 sq ft.

Delta-FL in conjunction with 5/8" OSB tongue and groove plywood is the perfect subfloor system for concrete and slab on grade floors. The plastic membrane is installed with the dimples down to create a 5/16"thick air space allowing the concrete slab to breathe. If there ever was a flood it would also allow the water to flow freely towards any drains. By installing this subfloor you will increase your floor temperature by 7 °C providing a warm and comfortable basement floor.

Music Credit:
Electro-Light - Symbolism [NCS Release]
Song Link:    • Electro-Light - Symbolism | Trap | NC...  

Time Codes
0:00 – Intro
0:53 – Landscape fabric
1:37 – Delta-FL Taping Seams
3:38 – Installing OSB subfloor
5:32 – Installing concrete fasteners
7:23 - Outro

All Comments (21)
  • @SexyEarHole
    I've been watching videos on doing this exact thing for two days now. FINALLY, I've found the one that explains exactly what I need to know, and in language I can understand (as a DIY'er). THANK YOU!
  • @petemiller519
    Nicely done! I am a retired structural engineer and wish all contractors would have your conviction and dedication to detail. Cheers from Canada.
  • @jmurray726
    I'm blown away at the quality of information. You didn't try to sell anything, you just gave straightforward information in an easy to digest manner. I'm eager to explore your other videos
  • I like that you put silicone in the screw hole for vapour barrier continuity. A small detail that I haven't seen others do. Nice work.
  • @yn9861
    I could never find a contractor that would care this much
  • @kevinbeamer8161
    Great video and thanks for landscape fabric tip. TY for sharing. Ideally, Delta-FL / OSB T&G is installed onto slab before non-load bearing walls are built. Then, for exterior walls, frame them ~1" from the foundation wall and create vapor barrier with closed-cell spray foam. This method provides an ideal transition from the subfloor underlayment to the poured concrete foundation wall.
  • @samtour8545
    Very refreshing to see a pro at work giving instructions and not trying to sell you something. Thanks a lot sir
  • @mikefreeman3772
    This is a great video regarding install of wood sub-floor on concrete basement floor. The main problem I see is, is that very few builders can properly dig & install basement structures using proper site prep., and drainage (my sub-contractor experiences). It's refreshing to see someone (this guy) doing a job correctly. I hope he stays busy and makes good profits.
  • @stormbytes
    Best darn video about subfloors and underlayment installation I've seen to date. Great job. Very helpful. Thank you!
  • Excellent video, my friend. Honesty, tips, and knowledge. I've been researching this for several weeks and you somehow explained all my concerns in 1 8 minute video. Again, excellent work. I'm going to do the sub floor first, then line the block wall with 1" foam board (for R value and vapor barrier) then build the walls on top of the sub floor. The additional tuck tape around the perimeter where the foam board meets the subfloor may be overkill for my build, but we ain't come this far...
  • i am in the process of removing asbestos tiles and mastic and then I am going to prep the floors for new tiles.Reading and watching everything that I come across. You are the best!
  • @NaeDeen
    I am super late but I’m beyond grateful for this video. Thank you so much! I’m building out my basement gym & the price of the dricore is killing me. I’m going to purchase the items in the video & I will install it in the rest of the basement to avoid spending my life savings on a floor. Thank you so much!
  • @EazyT8439
    Good job buddy great vid. I’ve been in construction for 17 years and I just nod my head when I see diy’s leaving Home Depot with three buggy’s of those 2 by 2 panels such a rip off, for my basement I actually used foundation membrane with the landscaping cloth already attached, as I got it for free from work. Again good job on showing ppl how to save their hard earned money.
  • Thanks for taking the time to put together such a great and informative video. It's answered questions I previously couldn't get answered about the sub floor from suppliers here in the UK.
  • Excellent instruction and calm voice with no fluff. Keep up the great work young man !!
  • @billknows1980
    I am a teacher trainer and looking at this video and assessing the teaching skills, well I would definitely give 10 out of ten to you, perfect, clear, and simple!
  • @eyeofthetiger7
    This guy knows what he's doing. Great work and thanks for the information!
  • @greatnationnow
    Great work! Thanks for being so thorough, and slow enough for people to listen to! Room looks super nice! I may do our basement with the same colors!
  • @UOAPlays
    Thank you for giving us some honest information that's not skewed by some sponsored deal. This is how YouTube used to be. Now it's all just clickbait commercial garbage. Thanks man, I'm gonna check out some of the other "how to" stuff on your channel. I just bought my first house and I'm finishing the basement. Just started pouring concrete after busting up the floor and putting in drain tile, and some of your videos cover things I'm about to start doing.