Sanding and Painting Birch Ply

Discussion in 'Wood / Woodwork / Carpentry' started by greenlikeapples, 21 Aug 2015.

  1. greenlikeapples

    greenlikeapples

    Joined:
    30 Sep 2012
    Messages:
    28
    Thanks Received:
    0
    Location:
    London
    Country:
    United Kingdom
    Hi

    I have built an under-stairs storage area with the help of a chippie. He did most of the work, but now that I look at it, one of the doors is not flush. It's built out of birch ply, and uses complicated hinges, so I don't really want to get into taking the door apart.

    Can I sand down the exterior face of the birch ply before it gets painted? Or is this likely to lead to delamination and other problems, during painting and further down the line?

    Many thanks

    Jon
     
  2. Sponsored Links
  3. Burnerman

    Burnerman

    Joined:
    7 Feb 2008
    Messages:
    23,222
    Thanks Received:
    4,509
    Location:
    Northumberland
    Country:
    United Kingdom
    You can certainly sand down......unless your paper is very rough there's no chance of penetrating the veneer!
    Why not prime it first, and then rub down?
    John :)
     
  4. greenlikeapples

    greenlikeapples

    Joined:
    30 Sep 2012
    Messages:
    28
    Thanks Received:
    0
    Location:
    London
    Country:
    United Kingdom
    Hi John

    Yes but I want to remove like 3mm, so going way through the veneer. My question is, if I sand through the face like that, exposing very gentle graduation of the layers, will that really cause problems with delimitation of the layers, as I apply paint, or years down the line?

    Jon
     
  5. Burnerman

    Burnerman

    Joined:
    7 Feb 2008
    Messages:
    23,222
    Thanks Received:
    4,509
    Location:
    Northumberland
    Country:
    United Kingdom
    Sorry Jon, I see what you mean now, but its a non starter to sand down 3mm of timber. There will be another way, such as resetting the hinges or even using a thinner ply.
    Why not ask the chippy back?
    Anyway, the ply wouldn't be particularly affected as its inside - regarding painting that is.
    John :)
     
  6. greenlikeapples

    greenlikeapples

    Joined:
    30 Sep 2012
    Messages:
    28
    Thanks Received:
    0
    Location:
    London
    Country:
    United Kingdom
    Why is it a non starter?

    Planer, belt sander with aggressive paper, etc?

    Can't reset the hinges without major hassle, don't think I can replace the ply without major hassle

    Jon
     
  7. Burnerman

    Burnerman

    Joined:
    7 Feb 2008
    Messages:
    23,222
    Thanks Received:
    4,509
    Location:
    Northumberland
    Country:
    United Kingdom
    Certainly it can be done, but the door would need to be set on a bench, and when you are taking that sort of material away there will be issues with keeping the sanded surface flat.
    John :)
     
  8. Dave54

    Dave54

    Joined:
    21 Dec 2008
    Messages:
    1,600
    Thanks Received:
    190
    Country:
    United Kingdom
    I agree with John. You will "unbalance" the ply by removing a layer from one side, and it may well warp in consequence.
    If you're not happy with what's been done, get the chippy back.
     
  9. Sponsored Links
  10. foxhole

    foxhole

    Joined:
    14 Mar 2006
    Messages:
    18,212
    Thanks Received:
    2,090
    Location:
    Kent
    Country:
    United Kingdom
    Ply was less than ideal choice for a door.
     
  11. greenlikeapples

    greenlikeapples

    Joined:
    30 Sep 2012
    Messages:
    28
    Thanks Received:
    0
    Location:
    London
    Country:
    United Kingdom
    Yeah chippie is coming back next week, so hopefully he can see how to sort it. Ply not ideal choice? It will warp?
     
  12. Dave54

    Dave54

    Joined:
    21 Dec 2008
    Messages:
    1,600
    Thanks Received:
    190
    Country:
    United Kingdom
    It won't (probably) warp if it's left alone, but the layers of the plywood are balanced each side, so both outer layers of the ply have the grain running the same way, and the next layers in are at 90 degrees to that and so on. if you remove a layer on one side, it will be unbalanced and may warp.
     
  13. endecotp

    endecotp

    Joined:
    2 Dec 2013
    Messages:
    3,950
    Thanks Received:
    507
    Country:
    United Kingdom
    Are these "complicated hinges" that you mention ones with lots of screws on them?

    If so, you can tweak the alignment of the door by adjusting the screws.
     
  14. JobAndKnock

    JobAndKnock

    Joined:
    30 Sep 2011
    Messages:
    6,838
    Thanks Received:
    1,483
    Location:
    Lancashire
    Country:
    United Kingdom
    You can tweak the alignment, but they still won't work if the door is warped and the framne is straight.
     
  15. joe-90

    joe-90

    Joined:
    28 Oct 2005
    Messages:
    31,283
    Thanks Received:
    1,063
    Country:
    United Kingdom
    I like the sound of these complicated hinges. I want some.
     
  16. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page