Roofing materials (was Sarah's house)

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sarahperdue

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Nov 7, 2009
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Location
Alabama
My property has several structures. I'm currently focusing on the main house, a workshop and a small brick cottage. 

 

The main house has asbestos fiber cement shingles from the 1930s. The roofing on two porches was replaced with asphalt shingles decades ago. I have recently had the porches and the brick house redone with metal. The fiber cement and metal roofs should be good for the long haul barring storm damage. We've cut most of the trees that are a threat to the house and have a few more to remove. I also love the sound of rain on a tin roof,  but it's been a long time since I've lived with it.

 

Both the fiber cement and metal roofs are fire resistant. Our biggest fire risks are electrical. The main house has wood siding. Our area is fairly humid. I'm insulating with Rockwool which is both fire resistant and hydrophobic. Now I understand why the pictures I see of Australian houses usually don't have trees. 

 

In our area, having trees around the house is risky because of tornadoes and hurricanes. Even though we are several hours north of the gulf coast, we frequently get high winds and rain from hurricanes. <span style="font-size: 12pt;">Our area experienced devastating tornadoes twelve years ago, and fallen trees took out many more homes than the storm itself.</span>

 

<span style="font-size: 12pt;">We love houses surrounded by trees down here (Alabama in the south eastern US). Think iconic pictures of southern US homes surrounded by huge live oaks covered with Spanish moss. My husband and I are over houses nestled in the trees. No big trees near our houses. </span>

 

We are very rural which makes building codes not much of a bother--permits & inspections? Who needs them? That said, I am restoring to modern electrical safety codes and the house is structurally sound.

 

Sarah

 
 
My house, which I bought in 1997, was built in 1941. It is the only house on this block that still has a wood shake roof. A friend recently informed me that due to fire danger, wood shake roofing isn't put on any more. I don't know if that's true, but when I replace this roof, it will probably be with asphalt shingles. That will involve ripping off all the wood shakes, and then affixing 1/2" (or 3/4") plywood over the existing spaced battens. That's because while wood shakes do fine with spaced support, asphalt shingles require a solid surface. I'm sure it won't be cheap.

 

There is a chance that additional battens can be placed into the spacing between the existing ones, but that could be tricky. I suppose I'll find out if a roofer would even do that. Another possibility is to remove all the existing battens, and then apply the plywood.

 

I used to have a good friend who was in the roofing business, but he's moved (back) to Massachusetts.

 

 
 
Metal

 

Does anyone know about the environmental impact of metal vs asphalt? I found the following article in Forbes. I didn't realize how much closer asphalt shingles have come to metal in terms of longevity. According to the article, the environmental impact of production is about the same, but I'm interested in the total environmental impact including disposal or recycling. 

 

Sarah

 
House remodeling concerns

Metal roofs are far better than asphalt shingles.

That article you referenced is full of mistakes I’ve never heard of asphalt shingles lasting 40 to 50 years 10 to 30. It’s more like it especially in the east where it’s very damp they tend to get black mold on them and disintegrate. I’ve never heard of an energy difference with metal or asphalt shingles and the nonsense remark about poor snow retention on asphalt shingles that doesn’t make any sense.

Electrical wiring in the home has about zero chance of causing a home fire, common home fires come from electrical appliances that are portable overheat, candles, etc. cooking accidents

If you’re concerned about home, fire prevention, consider installing a whole house sprinkler system while you’re doing this, they’ve been required here for 35 years and all single-family homes.

John.
 
Fire & asphalt

Hi John,

 

The error on lifespan of asphalt roofing tracks with what I thought before reading the article. I generally consider Forbes a reliable source, so the article is disappointing. 

 

When I said electrical, I was including appliances; however, I think old houses, at least in our area, are definitely vulnerable to electrical wiring fires. Did you know you can put a pennies behind screw-in fuses to stop them from blowing out? Yep, my great-grandmother's house was taken out by a penny, and it was filled with valuable antiques and souvenirs from her world travels. When I began the first phase of rewiring my grandmother's house, it had a mixture of paper insulated conduit, ancient insulated copper wiring and some aluminum. The electrician came out of the attic with apiece of aluminum wire that had all of the insulation stripped out of  about a foot of it. I was actually surprised not to find any pennies when I inherited my grandmother's house. I suppose they learned from my great-grandmother's fire. 

 

I'll look into sprinklers, but I'm not sure I'm up for doing that. I'm also not sure if our pump/well could keep up with the demand from an activated sprinkler system.

 

I know my fiber cement tile and metal roofs are far more fire resistant than asphalt. I've seen an asphalt shingle burn. It's impressive.

 

Sarah
 
Sprinkler water supply

If you are on a well, you would need a cistern or large water storage tank with a fire pump. An alternate is a pond, with pumping capability. Even on city water, a fire pump may be required if normal pressure is not sufficient.
 

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