roof

[Robert J. OConnor]

Asphalt shingles over spaced wood plank decking is the wrong way to get attic ventilation ... which should be with adequate eave and gable/ridge vents. It's not good to solve one problem by creating another ...

Marcel, don't worry as Gerry and I are mates. Even though we agree more often than not, we enjoy a good debate/discussion sometimes ... and even have fun with it occasionally ...

[Marcel R. Cyr]

Hi. Bob;

I guess I would have to say that is wrong by todays standard or was it wrong by yesteryear standard, that is the question.

The later, I believe would be correct. Can we compare todays standards with Construction techniques of the Past? To some extent.
Todays Manufacturers will commit any extra paper work and recommendations as required to protect their liabilities all caused by lawsuits of this economy.

Roofing installation on houses with rough sawn boards unsquared and lined provided adequate substrate for the roofing composites prior 1960's and was adequate.

Today, I guess I have to agree, it would not fly.

Marcel
</IMG></IMG></IMG>

[rwand1]

The reason planking is not used today is because of cost and installation time.

As to ventilation old homes with plank decking and no ventilation appear to have longer lives.

[Russel Ray]

Originally Posted by rwand1

As to ventilation old homes with plank decking and no ventilation appear to have longer lives.

Is there any research to support that statement? Or is it just a result of better construction materials and construction protocols resulting from a greater love of labor then versus today's get-it-done-now construction protocols? I would suggest that it's probably the latter.

[rwand1]

Russel

Just look at how wood shake and shingles are installed today. In most all cases the wood shingles are installed on plywood decking as opposed to the preferred method of spaced planking. Putting wood shingles on plywood decking will half the lifespan of wood shingles.

I am basing my statement on field experience particularly century farm houses. I am not suggesting new homes would fair better because of better building and ventilation techinques and increase in knowledge.

[Russel Ray]

Originally Posted by rwand1

Just look at how wood shake and shingles are installed today.

Due to the high fire hazard area in which I live, we don't use wood shingles down here, so I can't speak to how they are installed today or their preferred method of being installed today.

Originally Posted by rwand1

Putting wood shingles on plywood decking will half the lifespan of wood shingles.

Do you have some links to research that will support that statement?

Originally Posted by rwand1

I am basing my statement on field experience particularly century farm houses.

I'm wondering if you truly have enough "field experience" though to make such a generalized statement? And was that "field experience" acquired under controlled conditions? I suspect "no" to both questions. One would have to not only know the installation procedures but the maintenance that has taken place over the years. Etc.

[rwand1]

Well I guess thats why you live down in California and I up here. I know through experience and education that solid sheating for wood shingles is not as good at shingle longevity as planking. Just ask Carson Dunlop Consulting engineers.

Also I have the building code which does not indicate that spaced planking is not allowed.

Again I am talking old farmhouses that have planked decking, of course they were built to a different standard over a hundred years ago, no code, just the builders local expertise brought over from the old country.

I guess that is why my Municipalitiy also appointed me to serve on the Heritage Council, to advise council and to oversee the reassembly of a historic log home on town property and to help disassemble an old Victorian farmhouse to save historical artifacts, such as windows, doors, pine floor planks etc. What experience you ask?

[Charles R. N. Crooker]

You can find lots of info for this, here is some,Red Flags and Visible Contamination/cedarroof.jpg

Previous | Home | Next

[rwand1]

http://www.cedarbureau.org/faq/installation.htm
http://www.cwc.ca/applications/light...oof_design.php

[Roy D. Cooke, Sr]

Originally Posted by ccrooker

You can find lots of info for this, here is some,Red Flags and Visible Contamination/cedarroof.jpg

Previous | Home | Next

Originally Posted by rwand1

http://www.cedarbureau.org/faq/installation.htm
http://www.cwc.ca/applications/light...oof_design.php

Chuck and Ray great sites thanks .
Roy Cooke ... RHI.... Royshomeinspection.com

[Marcel R. Cyr]

I guess with my experience with cedar shakes and shingles, I have to agree with statements by Raymond Wand.

If one looks at all the newer installations of cedar shakes today as recommended by Manufactureres, you will see the link to comparisons of installation to 18th Century style.

Methods have changed slightly, but are still on the same principal of the old planking system that would let the shakes dryout from the attic space.

Marcel
</IMG></IMG>

[Russel Ray]

Originally Posted by rwand1

Well I guess thats why you live down in California and I up here. I know through experience and education that solid sheating for wood shingles is not as good at shingle longevity as planking. Just ask Carson Dunlop Consulting engineers.

I don't believe I said that one was better than the other. What I really asked for was some documentation. We don't install wood roofs here anymore, so I would find such documentation interesting since I haven't read up on it recently since I don't have to do inspect new wood roofs.

Originally Posted by rwand1

Also I have the building code which does not indicate that spaced planking is not allowed.

Well, duh! I have no problem witih spaced planking. In fact, we used to always do it that way in Texas when I was doing roofs in the '70s and '80s. Saved money, which, ultimately, is what it's all about. What I do have a problem with is a generalized statement that wood roofs last longer with one method over another method. I do find it interesting that you were for spaced planking but then took the double-negative position that the building code "does not indicate that spaced planking is not allowed, seeming to indicate that I had said that spaced planking is not allowed. I'm not familiar with anything anywere that says spaced planking is not allowed, regardless of what type of roof it is. I have seen manufacturer's installation instructions stating that it is not recommended for specific installations, like some of our heaviest concrete tiles here in high-fire-hazard-country.

Originally Posted by rwand1

I guess that is why my Municipalitiy also appointed me to serve on the Heritage Council, to advise council and to oversee the reassembly of a historic log home on town property and to help disassemble an old Victorian farmhouse to save historical artifacts, such as windows, doors, pine floor planks etc. What experience you ask?

Knowing how something was done well into the past does not necessarily make one an expert at the reasons why it was done, or not done as the case may be. It simply makes one an expert at what was done well into the past. One could certainly argue that if something done a hundred years ago was the best way, all things considered, then we would still be doing it that way.

So while the sites posted in the previous posts are good, I'm still not reading any documentation that supports your statements.

[rwand1]

Then don't believe me. You seem to be the proverbial fountain of knowledge. If you read the links you would find the answers.

[Russel Ray]

Originally Posted by rwand1

You seem to be the proverbial fountain of knowledge.

Nope. Just always questioning and always trying to find and provide answers.

Originally Posted by rwand1

If you read the links you would find the answers.

I did, but I didn't find anything that documented your statement that spaced planking caused a roof to last longer. I would like to read the research; I think it would be interesting. I grew up as a researcher and still do a lot of research.

Since we don't do wood roofs here, researching them is not going to be at the top of my list of things to do. Since you sound so knowledgable, I thought you might have some good documentation supporting your statement. Apparently you don't.

[rwand1]

Russel

.. and if you don't do wood roofs there, then your question is irrelevent. Otherwise look up the info yourself! No one else seems to have problem with it other than you.