jaydog
June 2nd, 2006, 10:23 AM
Hello,
I'm about to start with installing an interior perimeter drain (cutting thru the slab) to a sump pump (already have). I've been reading conflicting reports of installation. If someone could please verify my process, it would be great!!!
Note: Cement foundation wall, no footing (house was built early 70's), bottom of slab meets bottom of foundation wall, basement has finished walls with 2x4's.
My plan of attack:
1. Remove all items from basement.
2. Move water heater, washer/dryer away from wall and wrap with plastic.
3. Seal upstairs from dust etc/disconnect carbon momoxide detector.
4. Fan/vent basement
5. Cut perimeter with gas saw ~14" wide approx. 6" away from foundation wall due to 2x4 wall (using a hose to keep dust to a minimun and for blade cooling), remove cement slab additionally being chopped with hammer chissel.
6. Dig trench ~8-10" deep, remove dirt.
7. Fill trench with a 1-2" layer of washed stone (3/4"-1" in diameter) .
8. Lay in filter fabric - not sure to use?
9. Fill ~1-2" layer of washed stone on filter fabric.
10. Install perf. PVC pipe, holes facing down and a few clean out ports that would stick up out of the slab - just in case with clean ot ports?
11. Fill remainder of trench with washed stone, possiblly lifting up filter fabric on the sides and fill so a "U" is created. Basically there will be a U-shape of stone on the bottom, a U-shape of filter fabric, and finally another U-shape of stone with the PVC pipe in the middle.
12. Lay some roofing paper or such on top of pipe/stone which would be at the height of the bottom of the slab.
13. Cement over.
I hope someone can comment on my process/filter fabric/clean ports/stone.
Thanks for reading,
Jay
I'm about to start with installing an interior perimeter drain (cutting thru the slab) to a sump pump (already have). I've been reading conflicting reports of installation. If someone could please verify my process, it would be great!!!
Note: Cement foundation wall, no footing (house was built early 70's), bottom of slab meets bottom of foundation wall, basement has finished walls with 2x4's.
My plan of attack:
1. Remove all items from basement.
2. Move water heater, washer/dryer away from wall and wrap with plastic.
3. Seal upstairs from dust etc/disconnect carbon momoxide detector.
4. Fan/vent basement
5. Cut perimeter with gas saw ~14" wide approx. 6" away from foundation wall due to 2x4 wall (using a hose to keep dust to a minimun and for blade cooling), remove cement slab additionally being chopped with hammer chissel.
6. Dig trench ~8-10" deep, remove dirt.
7. Fill trench with a 1-2" layer of washed stone (3/4"-1" in diameter) .
8. Lay in filter fabric - not sure to use?
9. Fill ~1-2" layer of washed stone on filter fabric.
10. Install perf. PVC pipe, holes facing down and a few clean out ports that would stick up out of the slab - just in case with clean ot ports?
11. Fill remainder of trench with washed stone, possiblly lifting up filter fabric on the sides and fill so a "U" is created. Basically there will be a U-shape of stone on the bottom, a U-shape of filter fabric, and finally another U-shape of stone with the PVC pipe in the middle.
12. Lay some roofing paper or such on top of pipe/stone which would be at the height of the bottom of the slab.
13. Cement over.
I hope someone can comment on my process/filter fabric/clean ports/stone.
Thanks for reading,
Jay
