By jenica lee november 29 2012.
New siding over t111.
1 should i include a moisture barrier over the existing felt for the front of the home prior to hardiplank install.
That in my mind anyway raises the question of whether to apply a second layer of building paper under the shingles or to just shingle directly over the plywood.
T1 11 was a bad idea in damp climates for a number of reasons.
Bought in big sheets 4 8 or 4 12 these sheets can cover lots of sf very easily.
Overlay is simply to install a new sheet over the old sheet.
15 felt is a poor wrb at best so my gut instinct is that it is a good idea to throw a layer of 30 felt on before.
Some arizona houses were built with wood siding normally called t1 11.
In this case would you recommend eliminating the vents.
Now the kicker is whether or not to run 30 felt over the t 111 before siding.
The condition of the t1 11 should be examined carefully.
Lastly while t 111 siding is one of the least expensive siding products it needs painting or staining every few years and is generally not nearly as durable as many others.
I am working with a customer to install new windows and reside their house which currently has t111 siding with hardiplank lap siding.
The roof has virtually no pitch.
T1 11 fits that description.
I am quoting a reside for a ho it is currently single wall construction t 111 siding w 15 felt under the siding.
T1 11 siding is usually the structural sheathing not merely siding.
I want to put horizontal and vertical siding over the t1 11 with some wrb and coraplast strips behind it.
Hardie panels are not structural you can t just replace one with the other.
2 should i add a moisture barrier over the existing t111 siding for the other three sides of the home.
Nor can you overlay compromised t1 11 with a non structural panel and assume that it still meets the structural requirements.
Overlay of hardie plank siding over plywood t1 11.
But would the double layer of building paper tend to trap moisture in the t1 11.
I have a house with t1 11 as it s siding sheathing.
It has a flat roof and no overhang.
I will be installing hardie plank siding over the t 111 using it as sheeting.
If you are considering new siding i d suggest reviewing all options before proceding with a 2nd layer of t 111 siding.
I have been reading various opinions on this topic and hope to generate some conclusion on what is the right choice.
However there are several factors to consider before installing new siding over it.
Above all it is extremely important that there is a substrate whether it s new osb or existing siding in good integrity installed directly to the studs underneath the hardieplank siding.
My inclination is to do the former apply a layer of building paper under the new shingles or siding.
