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.

Thd sku 154661. Felt or building paper must be applied to walls properly to be effective. Typically building paper is installed as soon as the sheathing is installed. Nowadays low cost 15 felt can weight as little as 8 to 12 pounds per square 100 sq.

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. I want to replace the tar paper but i can t find it at homedepot or lowes. Should any water get past the siding properly installed felt.

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. Fortifiber 2 ply 162 sq. Moisture will find its way into these wall systems by way of cracked mortar joints gaps or cracks in the surface of the material. 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.

Use tyvek over building felt under siding. Felt paper also commonly referred to as tar paper is an underlayment material applied to bare walls before siding is installed. 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. I ll stick with tried and true felt paper.

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. Install flashings metal self adhesive or both as recommended by the window or door manufacturer or as required by local codes. I saw a new house with felt paper under the siding rather than tyvek. They were built in the 1950s and 60s the felt was in perfect condition.

Faq s acronym s terminology to tyvek or not to tyvek that is the question. 60 minute building paper for use behind exterior wall cladding including stucco fiber cement siding brick vinyl and wood siding. But to be effective it must be integrated with the flashing that follows in later stages of the job. I have seen literally hundreds of houses stripped of asbestos siding that had 15 felt under it.