No! You don't need to be some kind of literary genius, constantly scribbling out ideas when you can't add anything to your blog in the normal way. As a matter of fact, you might very rarely have to think up "special" ideas for your posts. Whether you realize it or not, with every remodel you do, you're doing things worth blogging about. The following are a few ideas to get your creative juices flowing, so you can pump out the content like a champ.
1. Make Yourself Look Like an Expert.
Sometimes people will e-mail you or post on a forum with a question, and you'll be tempted to just answer it privately. Resist this urge. First, make the question and answer public on the forum, if not on several. Then, turn your response into a super-detailed blog post. Don't be afraid to spend an entire day answering the crap out of that question, as well as some additional questions that will inevitably come up.
2. Share the Lessons of Your Teachers.
One of the best and worst things about the building trades is that most knowledge is passed down by watching someone more experienced do something, and having them give you advice. This is great because it keeps the knowledge very practical, but it's terrible because it only reaches insiders. On your blog, share the lessons you've been taught, and your customers will see you as a lifelong student on a quest to be the best remodeler you can be.
If in doubt, hire a ghostwriter. They're great for brainstorming, and posting for you while you're on vacation. A competent writer will ask you're targeting, and will write in a voice appropriate for that crowd. The best writers' work won't even need much editing.