Foo Fighters -- still fighting

Apparently, Dave Grohl isn't the only Foo Fighter who brandishes a wry, self-deprecating sense of humor. So does bassist Nate Mendel, who called while the band was still on break following its Grammy Awards appearance two weekends ago -- one of several things he had a good chuckle over.

Mendel joined in 1995, after his previous band Sunny Day Real Estate split up and Grohl had climbed out of Nirvana's rubble with a strong batch of self-recorded tapes that become the first Foo record. Thirteen years later, the group is one of the few rock bands with punk roots performing in arenas. And it's literally bigger than ever, too, having expanded into an eight-piece touring lineup for the band's new album, "Echoes, Silence, Patience and Grace."

Q How did the band manage to double in size?

A It wasn't anything that was really well-thought-out or strategic. With [the 2005 double-disc] "In Your Honor," we had this idea to not only split the album up into quiet and loud sides, but to split the tour up that way, too. The acoustic tour ended up being the most fun, because it was something new. We'd been doing the same thing for 11 years. It made us feel like musicians. It gives us a little more to brag about: "Check us out, we're a rock band with a piano. We're versatile!"

When we would have like one random rock show in the middle of some of those quiet shows, we'd practice a song like "All My Life," and we were like, "God, this is easy." It got us excited about the different possibilities of the band, so we incorporated some of that into this new record.

Q Another big change is you guys are all family men now. How's that working out?

A We had a month-long tour last fall, and my family didn't come out at all. When I came home, my son didn't want anything to do with me for about a week, until he remembered who I was. So we decided if we're going out for more than two weeks, to have everyone come out, and that's been going great. Except now my son has a little trouble realizing what's home. He thinks he has an L.A. house and a New York house now instead of just hotels.

A It's a new challenge. We had to. We could have kept playing in the same size venues that we were playing before, but we decided it was the natural evolution of the band. Dave writes the songs, and these are the kinds of songs he likes to write. He's not pandering to a big audience. He likes melodies and he likes songs to be direct, like pop songs. [Arenas] are where they're best suited. Dave has turned into a really good frontman. He's turned into a showman, and he enjoys it, like a new thing he learned how to do. It's fun.

Q You're the member with the longest tenure in the Foo, besides Dave. How do you look back on when you first joined the band?

A So much has happened since then. We went in pretty young and naive. I had really high hopes for the band, so I was excited to join. And it was fun right from the beginning. The second record was a huge challenge for us. I came in with Sunny Day Real Estate drummer William Goldsmith, and he left, and then Pat [guitarist Pat Smear] decided to leave, so that was all tough. We had to figure out what the band meant from that point on. We've been through a lot, had to grow. I'm really proud. We've worked hard and we've done some good work and survived.

Q You wrote the liner notes to the 10th-anniversary reissue of "The Colour and the Shape." Do you agree it's your best?

A Nobody wants to say, "That was our high-water mark" when it was 10 years ago. But I wanted to acknowledge its reputation as the band's best work. There's something that a brand-new band is going to be able to put into a record that a band that's been around a long time can't. A part of it is just raw enthusiasm, and part of it is the naivete and the lack of experience you have.

Q Pat Smear, who was with the band back then, is back on tour with you as a backup guitarist. How is it having him back?

A I love Pat. One good thing about having him back is we don't have to explain him anymore. The smartest and weirdest guy I've ever met in my life. He's a true individual. There's no one like him. And not to mention the way he plays and what he brings in. He loves it. He's such an individual on stage. No one has his schtick.

Back [when he quit], it just wasn't the right thing for him at that time. He was not ready to be focused on it. In a way, he could almost see the band turning into what it is now, playing arenas, and in a way that was something he wasn't ready to be a part of at that time.

Q Seeing Pat and Dave together again brings back memories of Nirvana, too. Is Dave's history with Nirvana still a big factor in the Foo Fighters? How often does it come up?

A It is and isn't a big thing. It still is Nirvana, a huge iconic band. But enough time has passed now where we can joke about things we couldn't joke about five years ago. Me personally, I always have kind of left it alone. There has always been so much pressure on Dave to explain his feelings about Nirvana, the last thing I wanted to do was ask him to talk about it for the thousandth time. He talks about it when he wants to.

A We would make fun of ourselves and say, "There's the band that used to be known for their good videos." What could we do? The content of the songs became a little more weighty and serious. You can't do a goofy video to "All My Life"; it would be ridiculous. So Taylor [Hawkins, drummer] had this idea for a while of satirizing the old '70s soaps, and it was a good match for this song. So we were like, "All right, let's put on the wigs again."

Q Were you mad about the band's surprise loss to Herbie Hancock for best album at the Grammys, sort of like when Jethro Tull or Steely Dan won?

A I thought that was cool as hell. I'm being totally honest. Kanye West and Amy Winehouse were both so favored to win. I said right beforehand, "I don't want to accidentally win this. People are gonna be pissed." And of course, Kanye was already the big non-winner that night, and he wasn't really conducting himself very well, I thought, so I was kind of happy he didn't get it.