Older lake houses in Hudson Bend often carry roofs from several additions, right next door to brand-new builds. Metal can work on both, though the older ones usually need a tear-off and some carpentry first.


Hudson Bend sits on a bend of Lake Travis about sixteen miles northwest of Austin. It's common for an older house near the water to have been added onto more than once: a bedroom wing here, a screened porch there, a carport that later became a room. Each addition tends to bring its own roof pitch, its own framing and its own idea of where water should drain. Before anyone orders steel, somebody needs to walk the whole roof and sketch how those pieces tie together.
Codes generally let metal go over a single layer of shingles, which saves the tear-off labor and the dumpster. On older lake houses we usually still prefer to strip it, for these reasons:
If the existing roof is one layer, flat and sound, going over it with battens or a vented underlayment is a fair call on a tight budget. Ask the roofer to explain why they chose one approach over the other for your house.
Screened porches and carports are often framed very flat, sometimes flatter than the main roof's panels allow. Those sections may need a mechanically seamed panel or a membrane roof that tucks under the metal trim. Mixing systems on one house is normal. Mixing them carelessly is how porches end up with buckets on the floor.
There's no salt in the air out here, so corrosion isn't the worry. Moisture is. On clear nights a steel roof can cool below the dew point, and damp attic air will condense on anything that cold. That's why house panels go over solid decking and a synthetic underlayment, never straight onto purlins. Keep the attic vented from soffit to ridge, and make sure bath fans and the dryer exhaust run outdoors instead of dumping into the attic.
Boathouses and open carports are a different case. If the panels sit on purlins with no deck, ask for steel with a factory drip-stop backing so the condensation doesn't drip onto the boat or the truck.
Additions also cause cooling trouble that a roof can't fix. A wing hung off a duct run that was never sized for it may stay warm whatever is overhead. Our roofing guides cover tear-offs and decking in more depth, and the Hudson Bend home energy guide looks at windows, siding and insulation for houses near the lake.

If you feel like you're spending too much on heating and air conditioning, a home energy audit by Texas Energy Pros shows you where the money is going.