No Tyvek Under Siding

Roofing felt seals around the nail after it heats up.

No tyvek under siding.

The irc 2000 code and our building dept. However properly installed tyvek weather barriers help protect against loss of r value in insulation due to wind washing. If this was true than every architect and every builder all over the country should be talking about it and it should be on the plans that you can t use tyvek under cedar. It is waterproof but allows smaller water vapor droplets through.

The wood that goes under residential siding exterior sheathing performs several functions. Vinyl siding is one of if not the most popular exterior cladding for residential homes. The barrier prevents wind driven moisture and when a nail is sealed it acts as a much smaller hole then if there was no tyvek. It seems that we have two options.

Exterior walls are 1 2 plywood w tyvek housewrap. Take the tyvek off and start over with a better detail i typically. This explains why the house does not retain heat. It adds insulation waterproofing and structural support for the framing.

Using the wrong materials for your siding not taping off seams in the house wrap or installing a moisture barrier with the strips hung horizontally these can all wind up threatening your sheathing and may potentially cause leaks. One would be to remove the siding wrap the house and then reside it. Faq s acronym s terminology to tyvek or not to tyvek that is the question. If tyvek is a good idea or not depends on where you are.

House under construction in coastal zone 3 2 story 2x6 wood framed. Tyvek is like goretex a la mountain jackets but for houses. Owner wants to install vertical metal siding reverse standing seam rustwall over tyvek house wrap and is concerned about the heat build up melting the tyvek. Dupont tyvek goes on the wood sheets and is covered up by a waterproof siding shingles.

There is no logical reason not to have house wrap under vinyl siding and many authorities strongly agree that it should be viewed as mandatory even if your local building codes don t necessarily require it. During a recent repair to our siding we found that the house had no building wrap tyvek under the siding. I have been asked to advise whether to 1. Installing foam board insulation under vinyl siding today.