![]() Home Hardware actually carries decent sized packages of stainless steel screws (up to 400 quantity) but are relatively expensive compared to various on-line sources. Home Depot is a joke regarding supplying stainless steel screws, at least at the store nearby they only sell screws in packages of 4 or 6 or some such ridicously sized package. folks is:ġ) Where are your stainless steel screws?, andĢ) Do you know what grade of stainless steel they are? The only "discussion" that I've had with Home Depot, Home Hardware, Rona, etc. Have you discussed this with your local HD Associate (Expert in training)? :)Not really. In any event, the conclusion remains: Stainless steel screws are a must for this type of application. Perhaps the difference in corrosion rates is due to the fact that the screws located near the perimeter are simply exposed to water a bit more than the other screws, but I doubt it. As mentioned above, the screws on the perimeter of the pool have black and corroded/pitted shafts (in less than 1 year) while the screws set back 20' or so (and thus are exposed to no salt water splash out) still have shiny green heads and un-corroded shafts. Given that the rate of corrosion is inversely proportional to the distance from the pool edge, I'm tempted to conclude that the salt water is responsible for most of the corrosion. 3000 ppm) combined with ACQ pressure treated wood is _extremely_ corrosive to those "green" deck screws (Duradized II screws in my case). The chemicals in PT wood is more corrosive than any salt from the pool.Perhaps, but what's clear is that the combination of relatively low salinity water (approx. :)īTW, given that I'm replacing about 2600 screws (and don't want to replace the screws yet again), I decided to splurge for the extra $200 or so, and purchased marine grade (316) stainless steel auger point screws! They are several on-line suppliers with competitive prices, but I sourced the screws from "Contractor's Depot" ( ) since they ship via USPS to Canada. In fact, Home Depot only supplies stainless steel screws (18/8 which really is just 304 grade) in small packages of 4 or 6 (which translates to about $1 per screw simply ridiculous)! I have a lot more negative comments/feedback about Home Depot, but I'll stop here. I'm sure many folks on this forum are thinking, "well duh, of course stainless steel decking screws should have been used", and indeed, in retrospect I realize the selection of stainless steel decking screws of at least 304 grade should have been obvious.īut what irks me about this situation, is that the folks working at the big box hardware stores seem to be unaware of the absolute necessity of using use stainless steel screws in such situations (salt water pool and ACQ lumber). ![]() Clearly the combination of the salt water splash out (salt concentration of about 3000 ppm) and the ACQ preservative are no match for the "specially coated" steel screws. After less than a year, most of the screws near the perimeter of the pool have rusty heads, and more importantly, the shafts of many of the screws are black and significantly corroded. ![]() The decking material is 5/4圆 pressure treated lumber and #8x2.5 Duradized II (which are labelled "ACQ Ready") decking screws were utilized.Īs an FYI, the usage of the Duradized II screws for the decking material was a big mistake. ![]() Last summer I completed a pressure treated deck around an above ground salt-water swimming pool.
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