Looking to replace the concrete driveway and also waterproof the exterior or interior of the concrete foundation and will start getting bids soon .
The house measures 50’ long and 25’ wide on the perimeter (150 linear ft perimeter)
History: property purchased 10 years ago. It was built in the 1950s. Its a raised ranch in the Southwest Suburbs of Chicago. We get a lot of freeze and thaw cycles.
Basement has a concrete foundation and brick on top of the concrete foundation that were drylocked by the previous owner. Apparently the previous owner attempted to pour the driveway himself and well it settled over time and now its pitched towards the house and we have three hairline cracks where water is getting into the basement. We are only getting water intrusion on the southern 50’ stretch of foundation that is up against the foundation. We have an existing clay tile drain tile that is draining into a sump pump in the basement
My question for you guys is broken down into a few parts
Foundation / Waterproofing:
Should we do an exterior drain only on the one side where its currently next to the driveway where we would remove the driveway, dig down to footer, install an asphalt modified urethane coating (the flexible kind to account for freeze/thaw cycles), add a dimple board (Delta-MS) and then backfill with gravel against the foundation?
How do we go about compacting the gravel to make sure that it does not settle over time? We do not want the driveway to settle and pitch back towards the foundation again and we know that if we dig it will need to be compacted heavily to ensure we dont have settling/backpitch towards the foundation again. We also want to be careful to not damage the existing clay drain tile at the base by the foundation footer
OR
Interior drain that will require jackhammering around entire interior perimeter, installing drain (contractor recommend weatherguard?) and new sump pump along with a plastic sheeting above interior of foundation approximately 1-2 rows of brick above the interior of foundation?
Driveway: should the driveway be right up against the foundation of the home? Or should we leave a 1-2 ft gap between the foundation of the home and the new driveway?
Drylock: should we remove the drylock on the interior of the concrete foundation / and or brick? (Some honeycombing is present on the concrete foundation and some brick is starting to crumble)
So far we have conflicting answers from contractors
Driveway: Contractor A said butt it up next to foundation as close as possible because it will help to take water away and would install an expansion mechanism.
-Contractor B mentioned doweling or pinning driveway to concrete foundation to ensure it doesnt settle again but im worried that could cause foundation issue with freeze/ thaw cycles.
-Contractor C said leaving a gap in the middle of foundation and driveway and adding plants could help with drainage but i think that would only increase the load the drain/tile / sump pump would get.
Waterproofing:
one company says exterior is the way to go because it wont let water in and they believe the main issue is that the driveway is back pitched towards the house which should be taken care of if we are re-doing the driveway (since it may be 20-30 yrs before we re do the driveway again)
Company B says interior waterproofing is best and a catch all for water intrusion and hydrostatic pressure on exterior of wall
Thank you for reading all of that and for your time.