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Posted by Edgar on October 19, 2006, 6:48 pm
>
> dpb wrote:
>> john@vieth.info wrote:
>> > My builder sayd he applies Thompson's Water Seal to the floor decks in
>> > case there is rain prior to roofing. Does that help? It occurred to
>> > me it might make it worse. If he applies it to the walking surface,
>> > water could shed off the surface and into the cracks where it soaks
>> > into the sides of the OSB boards. Once in the sides, the boards may
>> > not dry out properly if the Thompson's product actually holds the water
>> > *IN* as well as out. What do you think? Or am I just being a worry
>> > wart?
>> >
>> > Also, I have free access to axial air movers (fans) and portable
>> > dehumidifiers used in the water damage restoration industry. Would it
>> > help to run those after the roof is up? As for the dehumidifiers, they
>> > would not help until the roof, windows, doors, and siding are up. A
>> > guy told me it would do no good because, this time of year, the fans
>> > would just be blowing damp air over a damp surface, but it seems to
>> > work in the restoration industry, so why not?
>>
>> Yes, you're being a worry wart! :) Yes, if it rains before it's
>> covered, water _will_ get in the joints between underlayment (and
>> everywhere else, as well) -- it's just a hazard of construction. The
>> Thompson's will, overall, probably help some as it will tend to help
>> runoff and surface absorption (and there's a whole lot more exposed
>> surface than edges). It isn't a real impervious sealant, but mostly
>> works as a "anti-surfactant" to promote beading and runoff/shedding.
>> Water will evaporate back out, perhaps slightly slower than without it,
>> but you almost certainly will have quite a bit less to get out than if
>> wasn't sealed first. The most useful thing one can do is to sweep all
>> standing water off as soon as possible after the rain to get the drying
>> process started asap.
>>
>> As for fans, they will help speed up the proces at least some even if
>> the humidity is relatively high because they move the air and promote
>> evaporation. Unless it has been thoroughly soaked and you're not
>> having any warm, sunny days, however, I don't think I'd be overly
>> concerned about it until after it is enclosed, then you do want to try
>> to dry it out so that by the time the rest of the framing and interior
>> work is done it is thoroughly dry before flooring.
>>
>> In general, though, this isn't the only house that has been open w/
>> rains and that's been true for "since forever" and you can't tell which
>> ones of all the houses around are the ones that were/weren't can you?
>> I'd only get concerned if this is going on for months or cold weather
>> sets in w/ frozen precip in place you can't get rid of and aren't going
>> to be able to do so for quite some time kind of scenarios, not just a
>> rainy day (or even week).
>
> Tell him not to worry about the rain, because a true worry wart would
> worry about all of the Thompson's fumes he'll be breathing in over the
> next couple of years as it evaporates off.
> Tell him that headaches, nausa, chills, and nightmares are just a few
> of the things he can look forward to. It also causes the "new house,
> new baby" syndrome (I think that's called "sexual side effects").
> After all, it does say "use outdoors" for a reason.
>
> Of course none of this is true, but it would get a true worry wart to
> worry, none the less.
>
> :-))
>
I'm getting worried about the worry wart.
--
Edgar
--
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