DYI Deck Treatment vs. Services?

I've seen some of the deck "rejuvenation" services where they guarantee the deck for 3 up to even 25 years. Aside from having industrial sprayers to clean the wood (3-4000 PSI), what do they do that's different from what you'd do yourself with a sprayer and deck sealer?
Since super high pressure will tear up your deck, so the biggest difference is that their equipment has to be used at a greater distance and covers more area faster, I figure the difference is either that they're exaggerating about the durability of their coating, or the coatings are really, really great. Maybe some sort of plastic sealer?
The prices of these services (in my case, at least) turns out to be about 2-3 times the cost of my tearing up all the old planks and replacing the walking surface of the deck completely But then, (according to them, at least), I'd have to seal that new deck again anyway in about three years.
Is there any value to these services outside of appealing to folks who just don't want to bother with the hassle of replacing planks? Or are they really going to preserve a deck for 10-20 years -- i. e., longer than the life of a new surface?
And for that matter, since, in my case, for example, the cost of the treatment is about the same as pulling up the old surface and replacing it with a manufactured/synthetic material, is it better to just do that -- go to some sort of composite/plastic for the walking surfaces?
Thx!
Mark
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

they save work. thats it.
if the deck boards are sound, clean and seal
if the deck boards are rotting no sealer will work.
i would use deck cleaner britener, use stiff brush, let dry and seal.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
I'm curious .. How much exactly did they say they wanted to clean and stain and how big of an area..?
I got down on my hands and knees with some good ol' elbow grease, a brush, soap and water and a decent pressure nozzle on my hose and cleaned my front and rear decks and stained them with TWP... I highly recommnend that one by the way...
Another advantage is you get the satisfaction of knowing you did it youself and TWP is very user friendly..
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.