01:51AM | 07/14/12
Member Since: 12/18/11
11 lifetime posts

I recently poured a slab in my basement to support a new Oil boiler (approx 600lbs). The slab consisted of 13 bags of 80lb sakrete and it's about 5 inches thick. The room was an old sauna that's being converted into a boiler room and it was very difficult to work in there. It's been about 36 hours since I finished and I started to notice a few blisters at the surface of the slab. My question - Do blisters compromise the integrity of the slab? I'm not that concerned about the look, but am very concerned about the strength. Any advice on what to do with this? The boiler is supposed to be positioned on Tuesday. Thank you very much in advance!


03:26PM | 07/14/12
Member Since: 07/22/04
530 lifetime posts
"Do blisters compromise the integrity of the slab?"
Yes because the blisters are telling me you made the cement too soupy.
Didn't you reinforce it with anything?
I wouldn't set that boiler on it for at least a week. Don't forget they aren't going to gently set it on the slab they are going to basically slide it on.


03:54PM | 07/14/12
Member Since: 12/18/11
11 lifetime posts
Thank you for the response. There are about 7 - 1/2" x 4FT Rebar in the center of the slab. I just scraped the blisters on the surface and the slab certainly looks and feels solid. Is there anything else you suggest that I do? The boiler is probably not arriving for another two days, so it will have been approximately a week of curing. Thanks!


01:42PM | 07/15/12
Member Since: 07/22/04
530 lifetime posts
I think it will be OK then. I'm glad you reinforced it. The longer you can wait the better. Cheers.


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.


type the code from the image


Post_new_button or Login_button

With technology similar to that used by keyless ignition cars, the Kevo communicates with your iPhone via Bluetooth or a k... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... For some decorative recycling, consider burying old bottles upside down to create edging for your garden beds and walkways... Chocolate-colored walls and large window frames allow the exposed wood beams to take center stage in this small screened p... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... Like no other floor type, a checkerboard design works wonders to underscore the retro kitchen theme. Vinyl flooring, ceram... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... In this urban apartment, a standard-issue patio became a serene and green perch by replacing the typical concrete with gro... If you put the washing machine in the mudroom, you can stop the kids from walking through the house in dirty, grass-staine...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon