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-   -   Basement Windows - Please Help (http://www.diychatroom.com/f105/basement-windows-please-help-155018/)

spidercharm 08-27-2012 02:24 PM

Basement Windows - Please Help
 
I need some help and guidance on DIY repair for exterior of my basement windows (close to the ground). There are minor cracks around the joints where brick veneer and basement concrete foundation meets. I don't have any issues with leakage etc. But, I realize that it can cause issues in the long run. Please note that home is about 8 years old.

Please see the picture here:
https://picasaweb.google.com/1038409...65042040776050

I am newbie to the DIY concept. So, any details, links and references you can provide for the solution will greatly help.

Should I caulk/seal these cracks or apply a patch of mortar? In addition, should I also consider painting with some kind of waterproofing paint?

I greatly appreciate your help.

Thanks.

cleveman 08-27-2012 09:52 PM

It looks like someone got a bit overzealous with the mortar on the exterior. It also looks like your space on the left is greater than on the right.

Ideally, there will be a 1/4-3/8" gap all around the window. This gap is filled with insulation, then some backer rod, then it is caulked.

You can remove that mortar and make it right if that abomination is less than 5/8. I don't think you can caulk more than 5/8 and I think you'll have a hard time buying backer rod over 5/8.

spidercharm 08-28-2012 07:32 PM

Quote:

Originally Posted by cleveman (Post 997986)
It looks like someone got a bit overzealous with the mortar on the exterior. It also looks like your space on the left is greater than on the right.

Ideally, there will be a 1/4-3/8" gap all around the window. This gap is filled with insulation, then some backer rod, then it is caulked.

You can remove that mortar and make it right if that abomination is less than 5/8. I don't think you can caulk more than 5/8 and I think you'll have a hard time buying backer rod over 5/8.

Thanks cleveman. That makes a lot of sense. I will try to scrap off some mortar to make space for caulking. I think depth of the cracks may not be more than 1/4th inch though. In that case, I probably don't need the backer rod.

I was considering DAP Dynaflex 230 for caulking. I am not sure if epoxy would be a better option compared to caulking. Are there any epoxy product you would recommend for masonry cracks that will work in my vertical and overhead situation?

cleveman 08-28-2012 09:25 PM

I don't think you need any epoxy.

Upon closer inspection, that window may be mounted too far in.

That may explain the mass or mortar on the left jamb. There is probably only 1/2 brick there to work with, so you may have to bring the window out a bit.

New construction windows may only have 1" from the nailing flange to the edge. This is all they need. 1/2 air space, then the window will project out 1/2" into the brickwork. But those foundation windows probably don't have any fins on them, so you can mount them wherever you want.

If the sill slopes away, you can mount them in the opening. Otherwise, you probably want them as close as possible to the outside edge. No reason to let water sit on the sill and run into the window opening.


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