Where to get low cost building materials?

[freebeard]

The dome in the picture cost $70-90K, was worth $120K on completion and was up on the market ten years ago at $1/4mn.

If I thought even one ecomodder cared, I could put up a thread on Saving@Home about how to make ceramic hexagonal tiles out of clay and sand and heat.

Edit: I think ice guard is sheet metal above the gutters.

To tear off or not is a judgment call. Ask someone who has looked at it. Roofing squares are 3x3'. Take the rough measurement, adjust for dormers and add 10%.

[acparker]

Ice guard is also known as ice and water shield. It is an underlayment that is waterproof, adheres to the roof decking and self-seals around small perforations (nails, screws, staples). Code determines if it needs to be used, how deep it needs to be from the edge and on which edges, based on the roof pitch and local climate. Similar material is used to seal window openings and windows.

Ridge vents are pretty easy to install. I don't know if 10' will be enough to vent your attic space. Each manufacturer should have some published guidelines. Turtle vents are ugly, but you may not have a choice.

[oil pan 4]

I used 22 packs (1 shingle out of the 22nd pack) of 75mph architectural shingles weighing of 68lb per bundle. The shingles that came off were the cheapest known to man 55lb per pack. So I assume it was around 1,200 of shingle, then there was the section of flat roof, that was rolled shingle, used 6 of those rolls, but don't recall the weight.
For a 1400 square foot house.
Figure how many packs of shingles it would take to redo it and that will give you a pretty good idea of the weight.

[cRiPpLe_rOoStEr]

Originally Posted by oil pan 4

I know the rest of the world or at least almost everywhere I have been uses cement shingle but they are very rare in the U.S.
In the U.S. we normally use asphalt composite shingles or steel for residential roofing.

That's what was used to replace the old ceramic shingles in the building where I live:

At least back here it's the most cost-effective roofing.

[rmay635703]

Originally Posted by redpoint5

The technology I choose will depend on what will produce the most kWh per $ for that location.

Generally the lowest cost energy in most parts of the country is
1. Natural Gas electricity generated at home
2. Heat produced by compost.
3. Heat produced by homegrown biomass/wood

Everything else is somewhat more expensive, including solar.

[roosterk0031]

Shingling over is the easiest thing to do, you wouldn't use tar paper or ice barrier. Instructions are on the package of shingles. Nice thing is you can be relaxed on time. It is recommended that you replace any missing tabs first.

You will have to remove the existing ridge row. I prefer the rolls of low profile shingle over ridge vent unless you have existing metal to reuse. I had some of the taller stuff that came in 4' lengths and it has a foam filter to keep bugs etc. out and after 10 years the filter was rotten, yep had to replace a 10 yo roof last summer. Not cheap at about $2.25/ft.

[freebeard]

cRiPpLe_rOoStEr -- What's in that? Because when I put P3 SEM Aminato in Google; the results are bracketed by asbestos removal ads.

O MIRANTE | Operação de retirada de amianto da Escola P3 de Almeirim doesn't mention the product and seem to be about a P3 school.

Telhas e caixas d is unreadable because it throws up a 'Like us and register' pop-over. As if....

[cRiPpLe_rOoStEr]

Originally Posted by freebeard

cRiPpLe_rOoStEr -- What's in that? Because when I put P3 SEM Aminato in Google; the results are bracketed by asbestos removal ads.

I don't know about P3, might be related to its thickness in milimeters, but sem amianto means that it's asbestos-free.