Replies

1. 
   Ken_Layfield | Apr 27, 2001 11:33pm | #1

   *
   Ivan - I've install a lot of T&G porch flooring and I've always hand nailed it. If its starting to lift, it sound like you are putting too much pressure on the joints. Take a look at two pieces of scrap. There should be a small gap in the centre of the T&G joint. If there isn't, then there will be a gap on the top and bottom of the joint and the added pressure you are applying to tighten up the joint is causing the buckling. The solution is to take a couple of strokes off the tongue with a power planer. Let me know if this helped.

1. 
   lonecat | Apr 28, 2001 01:39am | #2

   *Is it center matched? Or is it the real stuff and your helper got a piece upside down? I've noticed vast differences in quality with products from different mills.

1. 
   Ivan_Warrington | Apr 28, 2001 12:18pm | #3

   *It has a bead on the lower side and will install only one way.

1. 
   Ivan_Warrington | Apr 28, 2001 10:47pm | #4

   *Ken:I checked the tongue in the groove and there is approx. 1/4" gap.Ivan

1. 
   Ken_Layfield | Apr 29, 2001 04:09am | #5

   *How thick is the flooring and do you know if it was kiln-dried? Secondly,using a stringline check the joist tops are they all crowned the same way? and see if any are a 1" or higher than the adjacent joists.

2. 
   mark_cadioli | Apr 29, 2001 04:47am | #6

   *Since when do you lay TandG on exterior deck??? ( and not expect it to cup)

3. 
   Ivan_Warrington | Apr 29, 2001 12:51pm | #7

   *Mark:What do you put on a porch? I have seen porches that are not cupped. I have also noticed that the pieces where the growth rings are down are not cupping more than the other. How do you keep individual boars from rising up?Ivan

4. 
   Jeff_J._Buck | Apr 29, 2001 10:10pm | #8

   *On a proch! For like a few hundred years or so.......jeeze.....ferners! I tell ya! Jeff

5. 
   Mike_Smith | Apr 30, 2001 02:55am | #9

   *last T&G fir we laid on an exterior deck.. we back primed and edge primed before we laid it...no cupping......i think we used galvanized cut nails on that one...

6. 
   Ken_Layfield | Apr 30, 2001 03:55am | #10

   *Ivan - T&G porch flooring should be install cup side up. The reason is that if water gets on the surface, the water will run to the centre of the board away from the joint and act as a gutter to channel the water away. I found this out in an old (1880's) carpenter's book. It also told how to minimize water damage on porches. Oh yeah, right on Jeff !

7. 
   Tim_Kline | Apr 30, 2001 04:23am | #11

   *b WBA At Your ServiceGalvanized cut nails ? What the ? We use galvanized oval head siding nails on boards that are primed all the way around. If you don't prime them first and they get wet from rain, they will do weird things like cup or swell.

8. 
   Mike_Smith | Apr 30, 2001 05:14am | #12

   *what's the matter tim, jealous cause you can't find any galv.cut nails ? hah !

9. 
   Tim_Kline | May 07, 2001 06:28am | #13

   *b WBA At Your Servicedon't your fingertips get all silver from spraying cold-galv on nails one at a time ?

10. 
    Roy_Kennedy | May 12, 2001 11:55am | #14

    *Thats right I have read old specks calling for lead painted on the joints

2. 
   Ivan_Warrington | May 12, 2001 11:55am | #15

   *
   I am installing (for the first time) a 1X3 heart pine T&G on an exterior porch. We have installed about 10" and it is starting to cup and lift up. We set it in tight and toe nailed the tongue with a finish nailer. It is on 2X8 treated with joists on 16" center. Need some help and or ideas.