07:03PM | 05/20/03
Member Since: 02/21/03
3 lifetime posts
Does anyone have any opinions on:

(1) available products and,
(2) the added cost/labour of

using undermounting brackets for decking as opposed to screws? The look of a seamless deck seems appealing....

Jim Fosness

06:53PM | 05/24/03
Member Since: 05/12/03
6 lifetime posts
If you log on to ******* .com, they have a system called Deckmaster, hidden deck fastening system. On this site, click on Hardware (on the left side of the page), then Outdoor Project Supplies and Kits, then on Exterior Hardware. It should be at the top of the page. In my opinion, ******* is a little bit on the spendy side, but they do have excellent product. As far as cost goes, the brackets are $249.99 for a 250 square foot deck (approximately 16'x16') Labor is questionable. Obviously, it will be quite a bit more time consuming, therefor more costly. If I were to guess, you would be looking at about an additional 4-6 hours in labor depending on the size of your deck.

I do agree with you, it will make your deck look great since it will be seamless. I have not used these brackets before, so I am curious how it turns out. Keep us posted!!!

Good luck!


04:10AM | 05/29/03
Member Since: 11/19/02
59 lifetime posts
Rookie- As a treater, I'm not wild about them. Strictly if we're talking about a southern yellow pine deck. There's way too much dimensional instability in treated wood, in my opinion, for most of these products to work well. There may be some adequate systems in the marketplace that still utilize screws from underneath and the sides, but I've yet to see anything that possesses the clamping power that we'd like to see.

I've been on 3 deck complaints this year where people were screaming because their decks were twisted and cupped, and all of them had undermount systems. In those cases I have to look at the homeowners and tell them that I'm sorry, but there's not a thing I can do because their decks were improperly fastened.

For my money, undermount systems work best for extruded or composite decking. I'll stick to hot-dipped galvanized screws when using treated lumber, and I'd recommend that you do too.

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