SHOP PRODUCTS
Houzz Logo Print
liketolearn_gw

Need HELP fast ... radon pipe leak? condensation?

liketolearn
17 years ago

Thought we had fixed the problem but again today I see water drops on outside of radon pipe. Frustrated, not sure what to do, and drywallers are scheduled to start tomorrow afternoon. Need help!

This is new construction. We have a 4" radon pipe that goes from the basement straight up to roof vent (passing through 1st floor, 2nd floor, and attic). There is pipe "boot" with a rubber seal around the pipe on the roof.

We notice water drops on the exterior of the pipe previously. So this is what we tried ...

~ We started by adding a vent cover (allows air flow) over the top of the 4" pipe since we thought rain was coming in at the top of the pipe. And we caulked and foamed joint at roof.

~ Again noticed water drops and recaulked all the pipe joints.

~ And again we notice water drops so this time we follow along the pipe. The pipe seems to be dry from the roof down to the connection joint on the 2nd floor. So we clean off the caulk and re-do it.

~ And today (it hasn't rained in 2 days) we again see water drops on the pipe and small amount of water on the floor where the pipe passes.

DH is just frustrated after trying everything he can think of. Now he's wondering if it is condensation and not a leak (but remember we're seeing water on outside of pipe).

We live in PA and temperatures vary greatly but the last week or so has been mild (60's daytime and lowest was mid-30's at night). Heating system is not turned on. The exterior walls are insulated (with closed-cell spray foam insulation) and once drywall is on the ceilings will be insulated as well with spray foam insulation. The attic area will remain unconditioned.

Desperately seeking solution ...

Comments (6)