Good for you Don.
http://www.youtube.com/watch?v=KaWO8oOUAT8 video 1
couple things… he was working w/limited funds so, if others can afford then backfill with most-all gravel, sand second best…not clay and other junk
also if you can afford it, apply visqueen on mastic, then if you want, attach membrane if it makes you feel better.
I think/sounds like he did/waterproofed about 125’
He mentioned cost to have done by companies $15,000-30,000.
Sure, some would bid all over the place.
To waterproof 125’ at his place, i would charge about $12,500 in case someone else wants to know but again, most homeowners would very likely get bids all over the place and if some bids were from interior system co’s then they’ll likely bid HIGH because, they don’t do exterior waterproofing and want to scare off homeowners on exterior waterproofing with high bids and other knothead-remarks.
I know this guy doesn’t know, NOT knocking him at all, but when he said something like the dimpled membrane RELIEVES any-all pressure, it does not.
The kind of pressure or weight one needs to be concerned with is the weight, the PRESSURE exerted against basement walls by saturated soil, lateral-soil-pressure.
Roots or concrete slabs or a porch footing etc can also can problems.
So a dimpled membrane attached to the wall doesn’t RELIEVE or reduce these pressures/weights,
If someone where to dig, then apply a dimpled membrane and then put clay, silty soil back in, then they did NOT relieve ANY pressure against the wall. Sure, if there was concrete, roots against wall and they removed it then they did relieve some pressure. But again, the membrane alone does not. The clay soil will continue to expand, contract, will still act upon the wall.
If they dug it out and and used a membrane and then backfilled with most-all gravel then they DID reduce soil pressure/weight acting upon the wall.
5:35 ish of second video, apparently after he finished waterproofing they got 4" of rain, no water in basement.
Just make sure, look around the GRADE and ABOVE grade for ANY direct openings into house, find em and seal em up. Around any doors, windows, where any service line enters house and so on.
Near end of 2nd video he lists his costs.
One more note-- even though he apparently had no cave ins, you have to be very careful, especially when leaving trenches open overnight or for days etc, they can indeed cave in.
Good DIY job Mr. homeowner
http://www.dwightyoderbuilders.com/concrete.cfm 6th paragraph…
…backfill all the way up with GRAVEL (not dirt) to within 2-3" of the finished grade.
…this type of drainage (the gravel backfill), prevents trapped water and saturated soil next to foundation (wall) from building up horizontal hydrostatic pressure (lateral pressure)
It’s the actual removal of x amount of clay soil and any concrete or roots against walls or porch footing etc that WAS causing more pressure against wall.
So getting rid of that junk and backfilling with most-all gravel is what helps REDUCE pressure, NOT the attachment or use a dimpled membrane!!!
A dimpled membrane doesn’t remove the clay, silty soil. roots etc etc that acts, that causes pressure against walls.
Many inside system companies, owners, salespeople actual believe and tell homeowners lots of crap such as, using a dimpled membrane on/against inside walls and when they DRILL HOLES on inside blocks, that it relieves pressure against basement walls…
Hippity hoppity this Easter with Kate Upton, got eggs?