NC for this one as it's quite outing. I live in a 1960s felt roof house, so wasn't put off by it. It's much more expensive to heat - ours is about 1800 square feet, pretty much single storey and costs £400 a month in gas and electric. Home insurance over £1k. Never gets above 18° in winter. Half the roof was fibreglass, which failed within 5 years - not a good roofing material. The other half (sloped) was felt installed in 1996 and is still fine with no leaks. When we replace it we'll get a warm roof and hope that saves us some money/keeps the house warmer. I wouldn't buy a felt roofed house again, but it allowed us to buy a larger house with more land than we could otherwise have afforded, so I don't regret it. And it's a very individual house, which I do love.