No Tyvek Under Siding

Installing foam board insulation under vinyl siding today.

No tyvek under siding.

This explains why the house does not retain heat. I have been asked to advise whether to 1. It might work before i hand the siding and trim but after that it s swiss cheese. It is waterproof but allows smaller water vapor droplets through.

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. 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. The irc 2000 code and our building dept.

If tyvek is a good idea or not depends on where you are. 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. Use tyvek over building felt under siding. One would be to remove the siding wrap the house and then reside it.

Take the tyvek off and start over with a better detail i typically. Roofing felt seals around the nail after it heats up. Vinyl siding is one of if not the most popular exterior cladding for residential homes. House under construction in coastal zone 3 2 story 2x6 wood framed.

Faq s acronym s terminology to tyvek or not to tyvek that is the question. Even at wind speeds of 5 mph a wall without an air barrier retains less than 40 of its original installed r values. Dupont tyvek goes on the wood sheets and is covered up by a waterproof siding shingles. The wood that goes under residential siding exterior sheathing performs several functions.

During a recent repair to our siding we found that the house had no building wrap tyvek under the siding. It seems that we have two options. 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. However properly installed tyvek weather barriers help protect against loss of r value in insulation due to wind washing.