Building Paper Under Siding

The standard weather barrier used traditionally under wood vinyl and other siding materials is 15 pound felt.

Building paper under siding.

Protects against water intrusion. Install pieces in the correct order and make cuts carefully so any moisture can travel downward at all points without slipping under the wrap. Thd sku 154661. In fact many builders disagree on the effectiveness of house wraps altogether and while some builders will only install 15 pound asphalt saturated felt paper underneath exterior siding others swear by plastic fabric house wraps such as typar or tyvek.

When building exterior walls with stone stucco brick when building exterior walls with stone stucco brick cedar eifs or fiber cement siding it is important to use an effective rain screen system that will provide a means for drainage and ventilation. Perhaps recent damage to their siding showed no house wrap under their vinyl or they are working with a contractor who doesn t believe house wrap to be necessary. For stucco the standard is two layers of grade d building paper. Install flashings metal self adhesive or both as recommended by the window or door manufacturer or as required by local codes.

Use tyvek over building felt under siding. But to be effective it must be integrated with the flashing that follows in later stages of the job. Should any water get past the siding properly installed felt. This means for example having to slit the housewrap above windows to tuck under the upper leg of a metal cap flashing then taping the wrap to the flashing.

They were built in the 1950s and 60s the felt was in perfect condition. Felt or building paper must be applied to walls properly to be effective. Moisture will find its way into these wall systems by way of cracked mortar joints gaps or cracks in the surface of the material. House wrap is indeed considered a necessity by the majority of contractors as well as housing authorities including local building and planning departments.

Faq s acronym s terminology to tyvek or not to tyvek that is the question. I saw a new house with felt paper under the siding rather than tyvek. I ll stick with tried and true felt paper. Fortifiber 2 ply 162 sq.

Typically building paper is installed as soon as the sheathing is installed. I want to replace the tar paper but i can t find it at homedepot or lowes. I have seen literally hundreds of houses stripped of asbestos siding that had 15 felt under it. Nowadays low cost 15 felt can weight as little as 8 to 12 pounds per square 100 sq.