Thick wall thimble

[onewheat]

Thick wall vent thimble

When I look for wall thimbles, they all seem to accommodate up to a 7" wall - I am brick, sheathing, 2x6 stud (filled with blown-in insulation) and plywood - so about 9.5" or so, I think. How do you work that out? Do I extend the sheet metal between the thimble halves or what?

 

[larry_g]

What do you plan to pass through this thimble? ID maybe?

lg
no neat sig line

 

[onewheat]

Sorry - horizontal exhaust duct from a forced air garage heater - I don't have one yet, but I am assuming it is either a 3" or 4" duct.

 

[rburke65]

Does the heater mfg. not sell a thimble ? You can't be the first to need one of these.

 

[onewheat]

I was just looking online at vent kits, etc and looking at thimbles - they all seem to be 7" - I haven't seen any for a thicker wall.

 

[brewchief]

Most of the thimbles I've seen allow you to extend the wall thickness with either sheetmetal or the proper sized pipe, it will be noted in the installation instructions if allowed.