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"Thin" Heartwood Pine for a Table Top

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Forum topic by wkerr posted 05-23-2017 03:33 PM 743 views 0 times favorited 7 replies Add to Favorites Watch
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wkerr

10 posts in 2529 days


05-23-2017 03:33 PM

Topic tags/keywords: question pine joining

I have lots of ships lapped heart pine coming out of the house that my grandparents lived in most of their lives. This material, when planned and ready for joinery will be around 5/8 inch thick. I really want to build a table top out of this for obvious sentimental reasons, but I’ve yet to settle on a solution for the thickness. looking for suggestions on how to build this top. I thought about using a substrate but not sure if that’s reasonable or not.

Thanks in advance.


7 replies so far

View LittleShaver's profile

LittleShaver

207 posts in 457 days


#1 posted 05-23-2017 05:55 PM

A layer or two of plywood should serve nicely. Consider edge banding the ply with strips of pine.

-- Sawdust Maker

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jdh122

962 posts in 2655 days


#2 posted 05-23-2017 07:10 PM

Do you have enough to double the thickness by laminating two thicknesses together? That would bring you to just over an inch thick, which is visually about right to my eye.

A plywood substrate will probably work, but I’d worry a bit about wood movement gluing the wood to the plywood, given that the plywood will be more stable than the pine. It might be OK since pine is pretty dimensionally stable.

-- Jeremy, in the Acadian forests

View Rich's profile

Rich

1981 posts in 427 days


#3 posted 05-23-2017 07:24 PM


A plywood substrate will probably work, but I’d worry a bit about wood movement gluing the wood to the plywood, given that the plywood will be more stable than the pine. It might be OK since pine is pretty dimensionally stable.

Folks use plywood as a base for veneer all the time. Not the thin, paper-backed stuff either. If he’s attaching shiplapped boards, they aren’t going to move across the grain enough to matter.

I think Dan pretty much nailed it.

-- No matter how much you push the envelope, it'll still be stationery.

View Carloz's profile

Carloz

976 posts in 429 days


#4 posted 05-23-2017 08:20 PM



A layer or two of plywood should serve nicely. Consider edge banding the ply with strips of pine.

- Dan Hulbert


one should be very careful taking free advice from internet

View TungOil's profile

TungOil

747 posts in 332 days


#5 posted 05-23-2017 11:23 PM

5/8” would be too thick to veneer, I wouldn’t go thicker than 1/8” for veneer glued to plywood cores and even then you need to use a urea formaldehyde glue like Weldbond to assure it won’t creep over time. I think Jeremy has the right idea, if you have enough material to glue up two thicknesses you can create some thicker boards that you can then glue up like a thicker solid tabletop.

Also, as someone who is in the middle of making a table from shop sawn veneers over ply core, I can tell you it’s a huge amount of work compared to just gluing up a solid top and you’ll need a vacuum press to really make it look right when it’s done.

-- The optimist says "the glass is half full". The pessimist says "the glass is half empty". The engineer says "the glass is twice as big as it needs to be"

View Rick_M's profile

Rick_M

10630 posts in 2217 days


#6 posted 05-24-2017 01:04 AM

Do not attach plywood to the bottom of the tabletop. If you want to make it appear thicker, glue a second layer on the bottom, around the edges only.

https://wunderwoods.wordpress.com/2013/09/17/how-to-make-a-thick-countertop-out-of-thin-wood/

-- http://thewoodknack.blogspot.com/

View ADN's profile

ADN

187 posts in 450 days


#7 posted 05-31-2017 03:56 PM

If the pine heartwood is that thick 5/8 then no reason to glue it to the substrate, just edge band it with a rabbet (lip) to capture the substrate. You can even do a few elongated holes with screws and washers if required.

I’ve made several islands and bar tops using this method and it works great…

Andy

-- mos maiorum

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