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Thread: Paulownia
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28th November 2008, 08:09 PM #1New Member
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Paulownia
Folks,
I'm thinking of lining the inside of the roof with Paulownia boards (e.g. Glosswood as in www.glosswood.com.au). The boards would be secret nailed to the rafters. I've seen various claims about Paulownia being termite resistant as tested by the University of Western Australia. However, I'm having trouble finding verification of this. I would appreciate hearing if anyone has further information or leads on this.
I'm also wondering if Formica laminate flooring from Bunnings might be a better, more durable alternative although I have no idea of the termite properties of that either.
Regards,
Tony
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29th November 2008, 04:27 AM #2Skwair2rownd
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Why are you lining the inside of the roof?
Will be expensive and tedious. May be a better solution.
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29th November 2008, 07:01 AM #3
Exposed rafters?
http://www.paulownia-timber-sales.com.au/Paulownia.htm mentions that it is more resistant to termites than jarrah or pine.Cheers.
Vernon.
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Bite off more than you can chew and then chew like crazy.
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29th November 2008, 08:28 AM #4SENIOR MEMBER
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I own the web site mentioned above and could not remember adding this information to it. Using the link this morning I could not find it there. Puzzling!
Any way it is correct. I have acquired a copy of a report prepared for a specific client by the Curtin Uni WA. I am not sure about copy rights and client privilege etc so I won't copy it. But briefly stated they put 70 x 19 mm Paulownia boards under leaf mulch and within 1 metre of fallen Eucalyptus logs that was infested with termites in 1999. After 9 months they were in the same condition. There was no evidence of attack.
The report has a PYA comment to the effect termites are unprictable and users should apply the same treatments as other timbers. Final comment was to the effect that Paulownia may be better than Jarrah in respect of resisting termites.
Hope this helps
John
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29th November 2008, 09:10 AM #5New Member
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Reason why I want to line the inside of the roof
I've converted the carport into a new room and moved the car parking further back under a shade sail arrangement.
The carport roof rafters are exposed. I want to keep the sloping roof inside the carport. Easiest solution to finish off would seem to be using Glosswood Paulownia boards secret nailed to the rafters on the inside of the roof. This would create an aesthetically appealing look. For the brick walls of the carport I'll either plaster or gyprock.
My concern with the Paulownia is really that I don't want the lined roof to be a magnet for termites. I guess I'm surprised that Paulownia has termite resistant properties given that it is a hardwood which is soft (easy to dent).
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30th November 2008, 08:40 AM #6Skwair2rownd
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Understand now.
I do regular physical inspections around my house, despite having chemical barriers.The termite control people tell me Physical inspection is a very sound method of detection and preventio/remedy.
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30th November 2008, 09:28 AM #7
Odd indeed. Here is the first full paragraph that I just copied from that page link -
Paulownia is a pale yellow to honey coloured timber with a low density of 260-290 kg/m3 at 11% moisture. It is strong for its weight and is highly resistant to warping and cracking. Paulownia is easy to plane, saw, mould, turn and carve and readily absorbs adhesives, stains, oils and varnishes. It is more termite resistant than jarrah and pine. Our plantation is farmed and the tree trunks are constantly pruned to remove lower branches. This process reduces the number and size of the knots in the timber.Cheers.
Vernon.
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Bite off more than you can chew and then chew like crazy.
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30th November 2008, 02:18 PM #8SENIOR MEMBER
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Paulownia
Vernon
Thanks for that. Now I know I'm in the CRAFT time of life. In my case R stands read not remember. Probably the same condition. Thanks anyway.
John
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30th November 2008, 09:00 PM #9New Member
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Thanks, good idea.
I'm also taking a look at Modwood (it's made from recycled plastic milk bottles and wood waste). Modwood has termite resistant properties although its fairly heavy, probably similar in weight to Jarrah. Modwood (www.modwood.com.au) can be installed using a stainless steel secret fixing method (http://www.klevaklip.com.au) but unfortunately it can't be used with the hollow version of Modwood (lacks side grooves). So if I use it my carport roof may end up weighing twice what it does now.
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2nd December 2008, 07:02 AM #10Novice
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I'd think that if the termites have made it all the way up to your roof, then you've got some serious problems; they'd have to have gone through your framing wood all the way, no?
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2nd December 2008, 09:22 AM #11
Frank,
You seriously underestimate the determination of our termites.
They will happily build their tunnels along metres of steel framing to get to a juicy piece of pine .....DAMHIK
Ian
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2nd December 2008, 10:31 AM #12GOLD MEMBER
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It will be too heavy with Modwood, the stuff weighs a ton and that is the hollow variety. Before you do this get an engineer to check it out as what you are proposing is generally not a good idea. Roofs are strong in compression, that is loaded from the top where all the loads are transferred down into the walls and roof structure. You are going to put it into tension and that is not good. I am not an engineer, just something I was reading the other day and it makes sense when thought about.
CHRIS
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2nd December 2008, 04:32 PM #13
Merbau is Class 2 durability and very termite resistant. Just a thought...
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2nd December 2008, 08:06 PM #14
Contact "Stopper" on via PM as he has loads of Paulownia logs to mill up.
Steven Thomas
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3rd December 2008, 03:29 AM #15Novice
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