No Tyvek Under Siding

Roofing felt seals around the nail after it heats up.

No tyvek under siding.

Exterior walls are 1 2 plywood w tyvek housewrap. Use tyvek over building felt under siding. 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. If tyvek is a good idea or not depends on where you are.

The irc 2000 code and our building dept. Faq s acronym s terminology to tyvek or not to tyvek that is the question. The wood that goes under residential siding exterior sheathing performs several functions. It might work before i hand the siding and trim but after that it s swiss cheese.

One would be to remove the siding wrap the house and then reside it. During a recent repair to our siding we found that the house had no building wrap tyvek under the siding. It is waterproof but allows smaller water vapor droplets through. Dupont tyvek goes on the wood sheets and is covered up by a waterproof siding shingles.

I have been asked to advise whether to 1. Vinyl siding is one of if not the most popular exterior cladding for residential homes. Even at wind speeds of 5 mph a wall without an air barrier retains less than 40 of its original installed r values. House under construction in coastal zone 3 2 story 2x6 wood framed.

It adds insulation waterproofing and structural support for the framing. Tyvek is like goretex a la mountain jackets but for houses. However properly installed tyvek weather barriers help protect against loss of r value in insulation due to wind washing. This explains why the house does not retain heat.

Take the tyvek off and start over with a better detail i typically. It seems that we have two options. 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. 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.