You can skip to the bolded parts near the bottom to get to my questions about product recommendations, if this is too long:
In the winter I noticed that there was some water up against a couple of the sides of the chimney (masonry) in the attic during rain storms. There was also one spot on the inside of the roof that was damp.
I had a roofing guy come; he checked the entire roof.
He ended up doing the following:
- replacing some iffy shingles in several spots, including where the wood of the roof underneath the shingles was damp.
- installing new pipe collars around pipes. (old ones were worn)
- sealing base of chimney with a lot of roofing cement and fabric
- I bought and had him install (since he was up there anyway) a chimney cap (previous owners should have done that years ago).
A few days later when it rained, I still noticed leaking that was wetting the chimney walls (only in the attic), so he came back and sealed the top (crown) of the chimney and even the sides of the chimney (above the roofline) with some kind of heavy duty
concrete (water) sealant that comes in a tube that is inserted into a caulk gun.
That seemed to do the trick; I didn't see any signs of leakage during a subsequent rainy day.
Now, about 8 months later, I went into the attic just to check everything, since it has been raining all weekend and it is supposed to continue into tomorrow. 3 - 5 inches predicted.
The entire roof itself is fine, including the spot that had been damp before his repairs.
However one side of the chimney wall is once again wet near the top where it meets the roofline inside the attic.
It is a little wet in one spots on the other side, but mainly all on one side.
Due to the heavy continuing rain, the water is even running along a beam, only in the attic fortunately.
Luckily this is not threatening the rest of the house and the base of the chimney in the attic is okay; only the upper portion is wet / damp, along with part of the small wooden support beam right up aginst the chimney.
The one beam that runs from the center of the attic to the edge of the attic is pretty wet (due to water running down it as a result of starting up by the chimney), but it isn't really dripping or anything, and the thick attic insulation would catch the slight drips if any.
I wanted to know if this chimney area leak is most likely from cracks in the crown, since the roofing cement at the base was a thick layer and should still be doing its job, besides which, the concrete of the chimney seems to be wet and not the inside of the roof, all located in the attic.
I suppose it could also be coming in from the side of the chimney if the mortar between the bricks is getting old and allowing rain water in (house is a 1960s house; mostly renovated inside and out, but the chimney is original).
I checked the ceilings and walls in the house by the chimney and where the beam crosses the house and they are all bone dry thankfully.
If anyone knows of a good concrete crown sealant, that can also be used to seal the sides of the brick chimney and mortar, I would appreciate it.
(Mmaybe the mortar on the sides, if deteriorated, is letting water in).
I looked at lowes.com - HomeDepot.com was down a few minutes ago - but couldn't find anything immediately.
I found one product (from Chimney Saver) that costs a whopping $138 for a tub of sealant; for that price, I may as well pay a chimney / roofing guy a little more to seal it using products he has on hand.
I'll probably drive out tomorrow to check the stores.
I won't be able to apply the sealant till Monday at the earliest if the rain has stopped and the outside of the chimney (above the roofline) is dry by then.
Any concrete / brick water sealing product recommendations, and / or names of stores that sell it, would be greatly appreciated!
I found this: