DIY Home Improvement Forum banner
1 - 7 of 7 Posts

· Enormous Member
Joined
·
131 Posts
Discussion Starter · #1 ·
I've been researching putting vinyl siding on my garage. It's a pretty basic 2.5 car detached garage:

  • Built in the 50s
  • Hipped roof
  • Plywood soffits
  • Wood clapboards on the outside
  • Some kinda foil-backed gypsum board underneath clapboards

My plan so far is to tear off the clapboards, plywood soffits, and put up vinyl siding, aluminum fascia, and vinyl soffits.

My question is.. there's currently no venting on the garage. No ridge vent or soffit vents.

I don't plan on finishing the inside of the garage.


Question 1:

Do I need to put in vented soffits when I do this? I figured some airflow might be a good thing.


Question 2:

There seems to be some sort of foil-backed gypsum board underneath the clapboards (possibly covered with tar paper).

Is this a suitable surface to put vinyl over if I nail through to the studs?
 

· JUSTA MEMBER
Joined
·
20,336 Posts
Airflow is a good thing.

Lets exhaust gasses out, as well as any other flammable fumes that accumulate in garages.

leave the existing foil backed insulation in place, it won't hurt, add a laver of foam core over it just because more insulation is always a good thing.

install the vinyl siding per the manufacturers instructions.


ED
 

· Registered
Joined
·
1,994 Posts
I'd go ahead and do the vented soffit. It costs the same (I think) it can't hurt.
As to adding some foam insulation if you have the cash go ahead but I'm of a mind its not needed on an unheated detached garage. So if you have something better to do with the cash do it.
 

· Registered
Joined
·
37,499 Posts
If you added anything but fan fold for foam you would have to build out all the window and door trim or remove and reinstall them over the thicker foam.
Insulation can be added later on the inside if you decided later to finish.
There has to be house wrap installed under the siding.
Now's the time to also wrap all the window and door trim with coil stock so there's no more painting before the siding goes on.
Unless you added a wooden sub fachia your going to find out the vinyls going to buckle and it's very expencive.
Coil stock would be far cheaper and can go right over the old wood if it's not rotten.
 

· Enormous Member
Joined
·
131 Posts
Discussion Starter · #5 ·
There has to be house wrap installed under the siding.
Does the existing tar paper qualify as house wrap?

Unless you added a wooden sub fachia your going to find out the vinyls going to buckle and it's very expencive.
There's wooden fascia on there now.. that's in mostly good shape.
 

· Registered
Joined
·
37,499 Posts
Post a picture.
If it's in good shape you can go right over it.
The vented soffit and a ridge vent will keep the garage a whole lot cooler and the shingles will last far longer.
To do this right you really need to also be wrapping any exposed wood around the windows and doors, Install all the soffits, then wrapping the fasias, and boxing, then installing the siding to make the whole thing trouble free.
I just hate it when I see people install the siding then try to wrap the wood after the fact, it leaves all the nails exposed.
 

· Enormous Member
Joined
·
131 Posts
Discussion Starter · #7 ·
Ok.... after some research, shopping around, and head-scratching.. I've decided I'm going to just repair the few damaged clapboards and repaint the garage for now.

However, it does need new gutters. Right now, it's just got the cheap, plastic, snap-together ones.. and the genius who installed them.. only put them on 3 sides of the hipped roof. Couldn't spend the extra $20 to do all four sides, I guess. So, my plan at the moment is to tear off the gutters, repair/replace fascia boards where necessary, and then wrap the fascia in aluminum leaving a channel for vinyl/aluminum soffits when I decide to redo the garage in vinyl someday... then put up some proper aluminum gutters.
 
1 - 7 of 7 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top