Below grade basement with sunken patio: Drainage Help!!
2 years ago
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Comments (9)
- 2 years ago
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Curbless shower on below grade slab
Comments (9)First..do a moisture test on your existing slab. You want to see if moisture vapor is coming up into the basement from under the slab. Tape a 2' square sheet of poly on the floor and see if there is any moisture under it after 48 hours. If the moisture is significant, it might play into what type of membrane you use on the floor. Memebranes like Hydroban and Kerdi have similar properties when it comes to liquid moisture, yet differing properties when it comes to moisture vapor transmission. Significant moisture drive could actually lift and delaminate a topical membrane from the slab. If you have under-slab drainage or radon ventilation pipes, and foundation perimeter footing drains, you should be in fine shape. I'd make it a wet room, pretty much follow Bill's advice; -slope the entire floor to the drain. -topical membrane on the entire floor and up about 6" on all the walls, or just fully membrane all the walls. Fully membrane the shower walls. -ventilation. Don't skimp. This room will be cool and the basement itself is typically humid, so latent drying action will be less than in an upstairs bathroom. Do what you can to eliminate moisture vapor as it is generated. -I'd not insulate or heat the floor. You might have to balance relative humidity in the basement as a whole with a heat source in the bathroom. If you do have vapor drive into your basement, it might help to have something as simple as an IR bulb on a timer to help with the initial drying of the room. For a humid, slow-to-dry shower environment; A non-porous porcelain tile might be better than a porous natural stone tile. An epoxy type of grout might be better than a portland-based grout....See MorePatio grade help
Comments (1)How awkward would it be to have chopped stone edging at the low side of the patio (at a slight angle so water can flow along the stone for drainage). The "wall" would be about 1 stone high above the patio. I tried to find pictures of this instance but had no luck....See MoreSoggy backyard with grade/drainage issues
Comments (26)If your main issue is standing water after it rains, you may want to consider the EGRP® system. It allows rainwater to travel straight into the ground, preventing any standing water from building up. Through the use of the EGRP® system, infiltration is enhanced by moving water more effectively and efficiently through the soil matrix and into the water table. Additionally, the EGRP® system helps re-balance groundwater conditions by establishing new ways water can move to, and through, the soil. To learn more about it, you may wish to search Parjana Distribution on Google and you will find a number of articles on how the EGRP® system was able to solve standing water issues. Please visit parjanadistribution.com to find out more information or feel free to get in contact with us by calling (855) 727-5262 or send an email to us at sales@parjanadistribution.com....See MoreBelow Grade Window Well Guidelines - New(er) house flooded
Comments (18)Worthy, Here is what I came up with - which I believe aligns with the ISO view you posted above. The only difference is that there isn't a drain. Is the soil level dipicted correct? Based on my experience with how water moves through soil either its needs to be as outlined or as you stated gravel all the way down. Fondation contractor called me back and plans to pound a PVC pipe down to the gravel at the footing and install a drain - said its the best solution at this point. I talked to him about the concept above and he agreed to review before putting the drain in. I told him I just didn't want him to put in the drian pipel then I go lowering the gravel 6". Not clear whose responsbiliy it is to replace the window well given it forces the gravel to be at the level of the window. The pic above isn't finish grade. That is before finish grade believe it or not! A different guy had to come in and knock that down almost 2 feet then put 6-8" of native topsoil down....See More- 2 years ago
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