Closing gaps in clapboards before insulating - help

[Mikeshums]

I'm thinking about insulating my garage but the first challenge is that the vertical cedar clapboards have gaps here and there from aging and some knot holes etc. They aren't everywhere but maybe 5-10 across the garage walls. And open studs to the exterior clapboards.

How would you go about sealing them up before doing any insulation?

thanks!

 

[rusty1]

Flex Seal from the inside, mask off outside with duct tape first.

 

[Mikeshums]

That's a good idea. I could get the tape and just tape from inside. I hope it sticks to wood though. Other suggestions?

 

[SALIV8]

what about rolls of stickon ice water shield

 

[NUTTSGT]

You need to seal up the holes and gaps with something that will prevent the weather from coming inside. If you don't, water will get in and start rotting from the inside. You will have a mess.

 

[Handyfarmer]

I would suggest wood battens,

or get some 3" ot 4" roll flashing, or have a someone with a tin slitter, slit some 2 or 3 inch wide strips, and put them over the slits in the wood, with short screws msot like I would suggest the hex headed sheet metal screws, one could caulk on the lumber before attaching the tin strips, (I would put these strips on the inside).

the other is to re-side the building and consider the current wall is sheeting, instead of siding

if one wants to stop the air infiltration, I would suggest cellous insulation, fiberglass will just let the wind blow through it, where the cellous is dense enough to stop the air movement,

had much the same problem in my barn, I insulated it with fiberglass, and sheeted it with strand board on the inside, I could not keep the room warm, so (I had used screws), and took the strand board off and removed the fiberglass, and blew in the cellous and then I could keep the room warm, later I was able to re sheet the ship lap with tin, and that helped as well,

 

[Mikeshums]

HF,

Thanks. Some good ideas there. I was thinking I'd probably tack in some membrane to reduce the airflow before the insulation. So on Cellulose, you completed the walls to the top and then blew it in from the top or what?

 

[Handyfarmer]

in my situation the walls were taller than where my ceiling was so I blew them in from the top, pulling the hose out as they filled,

I may have put some foam sheathing on the inside as well and blew through that and then put the wafer board on over the foam, it been nearly 20 years ago, and I do not remember the exact process I used,

~~~~~~~~~~~~~~~~~~~~~~~~

but I have blow many a wall drilling a hole about middle and then about a foot from the top I would use a reducer, and used a 1 1/4" hole and would glue in a plug, that was tapered,

 

[Radix2]

Well, if you built this new, you would put up tyvek before the siding.

So why not put up tyvek from the inside ? The only difference is it us not running under the siding against the studs. Still, it is the correct breathable material, imo better than having rubber or something under there that prevents drying to the outside.

Cut strips, staple to the studs, insulate.