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  1. #11
    Join Date
    Jun 2007
    Location
    Benfleet Essex
    Posts
    1,013

    Default Re: Deck seam paying on traditional laid deck?

    If its red & exudes resin it wont be iroko, it sounds awfully like Keruing, this commonly has resin pockets & end grain is similar. Usually used for lorry backs not for boat decks

  2. #12
    Join Date
    May 2001
    Location
    South Dorset/moored Poole/lay up Wareham
    Posts
    304

    Default Re: Deck seam paying on traditional laid deck?

    Must admit that if the sample is more red than brown then Kerruing is a possibility . The end gain of both does have some similarity although the photo needs to be a bit sharper to be totally accurate. Iroko has short chains of pores surrounded by a white border. Kerruing has mostly single pores surrounded by white border. As previously said Kerruing is not a common boatbuilding timber. Very unwieldy and difficult to finish with no real beauty.
    www.seasurveys.co.uk
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  3. #13
    Join Date
    Sep 2017
    Posts
    35

    Default Re: Deck seam paying on traditional laid deck?

    She's an old seine netter mate they won't have given a fudge about appearance!

  4. #14
    Join Date
    May 2001
    Location
    South Dorset/moored Poole/lay up Wareham
    Posts
    304

    Default Re: Deck seam paying on traditional laid deck?

    In the end I guess it is not really that important, the treatment and repair is the same whatever, although you might be better off repairing failed areas with iroko despite it being a different colour, it will all weather down to make no difference. Your deck is definitely a hardwood so you would not use a softwood like larch to repair it though as the stability (shrinking and expanding) is different.
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  5. #15
    Join Date
    Sep 2017
    Posts
    35

    Default Re: Deck seam paying on traditional laid deck?

    How important is it to get quarter sawn iroko?

  6. #16
    Join Date
    May 2001
    Location
    South Dorset/moored Poole/lay up Wareham
    Posts
    304

    Default Re: Deck seam paying on traditional laid deck?

    Probably not so important as it would be with teak as teak does have alternate hard and soft areas between the growth rings hence quarter sawn has the maximum areas of hard teak for a given width facing the surface of the deck minimising excessive wear ridging. Iroko is pretty much consistent with regard to surface hardness wherever & however you cut it as the growth rings are not prominent.
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  7. #17
    Join Date
    Sep 2017
    Posts
    35

    Default Re: Deck seam paying on traditional laid deck?

    Quote Originally Posted by johnlilley View Post
    Probably not so important as it would be with teak as teak does have alternate hard and soft areas between the growth rings hence quarter sawn has the maximum areas of hard teak for a given width facing the surface of the deck minimising excessive wear ridging. Iroko is pretty much consistent with regard to surface hardness wherever & however you cut it as the growth rings are not prominent.
    That would make getting hold of the timber a lot easier for sure.

    I thought the preference for quarter sawn was more because there was more growth/shrinkage tangentially than radially.

  8. #18
    Join Date
    May 2001
    Location
    South Dorset/moored Poole/lay up Wareham
    Posts
    304

    Default Re: Deck seam paying on traditional laid deck?

    That is true with softwoods but teak & iroko are very stable and the difference in a 2.5" wide board would be negligible. As previously said, the wear factor in plain sawn teak is more important than in iroko. That is also why it is required to have a flexible seam filler/sealant between the boards. The other reason quarter sawn is used is that it is easier to bend on edge if the deck is a swept deck. Straight run should not be any problem.
    Last edited by johnlilley; 16-01-18 at 08:36.
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  9. #19
    Join Date
    Sep 2017
    Posts
    35

    Default Re: Deck seam paying on traditional laid deck?

    The boards are 4" wide, 2.5" thick, so a little more expansion, but not much.
    Everything on board is bloody massive as there were a pair of rope drums bolted straight to deck, these weighed nearly 3.5 ton without the (lead weighted) seine rope.

    Thanks for the advice, now I just need to grow a set and chop a big hole in my boat...

  10. #20
    Join Date
    Sep 2017
    Posts
    35

    Default Re: Deck seam paying on traditional laid deck?

    The next question is what type of joint to use where I let pieces in to the deck.

    the joints are mostly going to be over deck beams, I'm not sure if the extra work of a nibbed scarf joint will be worth the effort compared to butt joints as they will be harder to caulk as well

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