My house--Tyvek or fanfold?

Old 04-03-05, 10:54 AM
Thread Starter
Join Date: Oct 2001
Location: USA
Posts: 146
Received 0 Votes on 0 Posts
My house--Tyvek or fanfold?

I'm preparing to (vinyl) side my house. It's about 100 years old, and is currently sided in aluminum (which is about 50 years old). I'm pulling off the aluminum siding, & putting the vinyl over the original wood dutchlap-style sheathing.

I'm debating on whether to use Tyvek or fanfold over the wood sheathing. I'm comfortable that the wood sheathing is flat enough and straight enough that I don't need the fanfold to flatten things out.

Is Tyvek the way to go, or is there some benefit to using fanfold? I feel like the moisture and air-infiltration benefits of Tyvek outweigh anything that fanfold can offer. Yes?


Old 04-03-05, 12:18 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 27,154
Received 932 Votes on 851 Posts

Yes, if you are tearing off down to the sheathing, you will want to apply some sort of building paper, and Tyvek is one of the best. You will want to take extra care around your windows to ensure water cannot get behind the tyvek at these points.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: