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We had our home recently renovated, and after a large rain, during AZ's last monsoon season, we found a large puddle on water in the house back our new sliding glass door. After determining we didn't leave anything open we figured out that the issue was due to water coming from the track. After even more research, we found that the track our contractor install has no water rating.

Our contractor is saying that we approved the design of the door and they showed us that they were using the flush sill. We were never told that the because they selected the flush sill that we may have water leakage or shared the image below.

My question is how is a contractor supposed to calculate the "PSF" rating for a sliding door? Is there some sort of guide?

Track Options

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    Are you in an area that has regular rain events like the one that caused leakage, or is this a once-in-a-blue-moon event? – Aloysius Defenestrate Mar 2 at 3:05
  • @AloysiusDefenestrate I am in an location that is mostly dry, but we have heavy downpours in late summer for a few weeks every year. – Eric S Mar 2 at 6:06
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Generally speaking, there is no formal guide to choosing a door. However, a thoughtful contractor would have considered the potential for heavy rain and wind-driven rain (especially the direction weather comes from) when choosing a door. That said, it sounds like you did approve the materials, so this is partly on you.

Short of replacing the sill (which is tough), my best suggestion is to attach an additional piece at the bottom of the door that will slow driven rain down. This can either be a drip cap, a sweep, or a combination. Look at google images for "CR Laurence Door Rain Drips", for example.

Note that there might be factors that haven't come up that drove the choice: some homes don't allow a sill like that to be dropped enough that the lip at the interior isn't a trip hazard. Cost/timing may have played a role (ie, high lip = special order = $$$/slow delivery).

  • Showing a client one option, not telling them that different sills are available based solely on water performance, and not taking into consideration that the 8" overhang above the door is sufficient to say, that the contractor did their job enough to spread the blame? I'm trying to reconcile for myself how I would've been able to make a different decision. I purchased a cast iron sink and the contractor said, hey that's going to be too heavy for the counter top, so we bought a new sink. Here we were never told there was another option or why we might want to choose thing else. – Eric S Mar 4 at 17:31
  • I know that this is your opinion based on the info you have, but I also wanted to add that based on your mention about a tripping hazard, I believe I understand why this option was chosen for us in the first place. Based on how the contractor built out the back all of the house, it would've taken time to drop the track low enough to not cause a tripping hazard. I believe this conversation was going on prior to our "sign-off" on the door and track. Thanks for your help. I just want the the problem to go away and this is one of a 15 or more issues we found after completion. – Eric S Mar 4 at 17:37

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