07:48AM | 07/11/03
Member Since: 07/10/03
1 lifetime posts
I have a 40 year old home with aluminum siding on it now. I have had a few people come out and I have heard two stories about what option is better to go with. The insulation will help compensate the loss of insulation I will have when removing the old siding. Another guy tells me that you don't need the insulation just to put on Tyvek and that's all that I need because it will stop any drafts. What option is better or should I have them do both? I would like opinions for both please the pro's and cons.


06:22PM | 07/12/03
Member Since: 01/28/03
693 lifetime posts
Tyvek is NOT designed as a product for older homes.

Tyvek is designed for new homes ONLY.

That said, adding 1/2 to 1" of foam insulation board over sheathing and under siding will do MUCH MUCH MORE than Tyvek ever can.

Best bang for the buck: NEVER Tyvek... ALWAYS foam board insulation.


06:51PM | 07/15/03
Member Since: 11/06/02
1281 lifetime posts
What insulation?

Tyvek is not an insulation. It is an air barrier. It depends what you are trying to do and you give little information, leaing one to guess.

There is a foam insulation product designed for installing under the vinyl and AL siding, but it is primarily designed to lend support and shape to the siding. It has very little insulation value because it is so thin.

If you are considering adding an inch of solid foam sheathing to the house, it depends where you are in climate. You could do more harm than good to the house by trapping moisture. Tyvek can breathe enough to let that moisture escape.

If you are attempting to prevent wind blowing through the house and control drafting and convection heat loss, Tyvek can help and won't hurt.

richard ricci

11:07AM | 12/08/12
Member Since: 12/08/12
1 lifetime posts
blackboard/sheithing ,with vinyl sideing , is tyvek, and foam board ok?


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