OSB or sheetrock over sprayed insulation?

[Hobo]

All,

We close on our new shop (even has a house on the lot) in December. I'm planning my moves for when I take ownership, and one thing involves finishing the shop walls in either OSB or drywall. I only have pics to go by, but it SEEMS like the sprayed insulation makes for a lot of uneven areas on the walls. How do I go about putting OSB or drywall over the sprayed walls?

Maybe I'm overthinking this and I'll just be hanging 1/2 strips and then my 4x8 sheets just hang on those, but I thought I would ask...

Thanks!

 

[Chris705]

Looking at the photo you may have a couple of options...I would think however you will want to hang tools, cabinets, work surfaces from these walls? And the solution will present itself.
1. continue adding interior girts (horizontal 2x4's) as PO has done at electrical panel and to hang tools to the left of panel. These girts can go between posts or on face of posts. Lots of discussions have taken place on this. Probably not the best solution for hanging heavy items, but could easily support some lighter items and easily supports the sheathing materials.

2. install vertical 2x4's between posts 16" oc. sheath with osb, plywd or gypsum. Very good at giving you the support for heavy items.

3. not being able to zoom into the photo I can't see how thick the spray is? If only 1-1 1/2" you maybe able to scrape the spray off the face of the exterior girts. and "smooth it out enough to apply your finish. Limited support but maximizes your floor space between the posts.

Again you need to realize what you will be hanging/supporting off these finishes. Even if not supporting anything I don't believe strips of 1/2 plywd will give you enough support to keep the panels aligned/straight etc and I would not recommend that route.

 

[Hobo]

Looking at the photo you may have a couple of options...I would think however you will want to hang tools, cabinets, work surfaces from these walls? And the solution will present itself.
1. continue adding interior girts (horizontal 2x4's) as PO has done at electrical panel and to hang tools to the left of panel. These girts can go between posts or on face of posts. Lots of discussions have taken place on this. Probably not the best solution for hanging heavy items, but could easily support some lighter items and easily supports the sheathing materials.

2. install vertical 2x4's between posts 16" oc. sheath with osb, plywd or gypsum. Very good at giving you the support for heavy items.

3. not being able to zoom into the photo I can't see how thick the spray is? If only 1-1 1/2" you maybe able to scrape the spray off the face of the exterior girts. and "smooth it out enough to apply your finish. Limited support but maximizes your floor space between the posts.

Again you need to realize what you will be hanging/supporting off these finishes. Even if not supporting anything I don't believe strips of 1/2 plywd will give you enough support to keep the panels aligned/straight etc and I would not recommend that route.

Thanks for the detailed response Chris. Makes sense and, yes, I would like not only to hang things from the walls but also to make a small 10x20 "finished" area adjacent to the back wall for a finished floor, 7' bar, TV, fridge, coffeemaker, etc.

 

[Pruittx2]

I'
m in Mid Michigan, and would not suggest drywall at all. The moisture on the foggy early/late winter days,, will wreak havoc on it. X2 on the continuing of the 2x4's and OSB. In area's you know you'll hang things,, you can put some added vertical 2x4's tying the horizontal ones together. With that setup, you could then add blown in insulation down the road. Start planning what you want in your layout, and get any additional romex ran and boxes added for outlets, and such. Nice looking shop! Enjoy it.

 

[hans109h]

I have gypsum covered in plaster and paint in my garage and I find that I feel more comfortable in such an environment over a room walled with OSB. True that gypsum may have some moisture issues, but if installed correctly you can avoid that, especially if you're going to paint it and get a good seal on it.

Just a personal preference.

Hans

 

[K'ledgeBldr]

Wanna lower your insurance cost- do the walls in drywall.

As far as the install, yes, adding the girts/blocking will give you a good substantial structure to support the wall finish.

 

[bowhuntr311]

Wanna lower your insurance cost- do the walls in drywall.

I asked my insurance agent about this exact thing and he told me steel panel will raise the value of my home compared to wood/sheetrock and that would be raise my premium. When I asked about fire barrier he said there was no difference unless I was a business.

 

[NUTTSGT]

I'm with Chris on this one. Once you get moved in or have a chance to get a better close up picture, take a few and post them up.

How big is that shop and do you know what the center is on the posts ?


BTW, considering your location, you're probably fairly close to me.

 

[OldNeons]

X2 on the continuing of the 2x4's and OSB. In area's you know you'll hang things,, you can put some added vertical 2x4's tying the horizontal ones together. With that setup, you could then add blown in insulation down the road.

I agree with adding 2x4s and whatever sheeting you decide on. However, in areas with heavy wall loads planned, you might consider building a standard 2x4 wall between your columns instead of just placing horizontal 2x4s. Even filling in the gaps between the horizontal 2x4s will not be as strong as vertical studs unless you go crazy with the vertical bracing on the horizontal studs.

assumimg you only have a few inches of spray foam, I would also fill in the wall void with additional insulation.

My two cents on sheeting is drywall or , my preference, steel sheeting. If you are worried about moisture and drywall then use green board. While I can appreciate the easy hanging it offers, and many are happy with OSB, I do not like the looks of it. If you do go with OSB, at least rent an airless sprayer and put some paint on it

Good luck making this nice space your own!

 

[truckin-on]

As far as sheetrock or OSB, I really like this stuff - LP SmartSide. Easy to install, water resistance (doesn't care if it gets wet), takes paint well, and strong enough to span 2' studs or girts with no problem. I would not use it on outside shed siding, as I don't think it holds up outside long-term, but it makes great inside paneling. You can also order it i believe in 12' lengths:

https://www.lowes.com/pd/SmartSide-Common-0-315-in-x-48-in-x-96-in-Actual-0-315-in-x-48-563-in-x-95-875-in-Primed-Engineered-Treated-Wood-Siding-Panel/3058153?cm_mmc=SCE_PLA-_-LumberAndBuildingMaterials-_-SidingWoodCompositeAndCement-_-3058153:SmartSide&CAWELAID=&kpid=3058153&CAGPSPN=pla&store_code=1656&k_clickID=go_625667893_34613739550_111132547150_pla-313861739007_c_9003949&gclid=EAIaIQobChMIvP2k_tPf3gIVh0CGCh2ZpAgzEAYYASABEgI3aPD_BwE

 

[Hobo]

Thanks all! I appreciate the comments and there's some good advice here.

Now to just close on the house in early December...

 

[jimp]

I have both FRP over OSB and Sheetrock. I helped my BIL do his shop with panel liner, wish I had used panel liner on mine.

Just another possible finish to consider.

 

[OldNeons]

I have both FRP over OSB and Sheetrock. I helped my BIL do his shop with panel liner, wish I had used panel liner on mine.
.

Could you elaborate more on why this is your preference? Also, Curious how your FRP over rock worked out? Thought of running FRP all around the garage 4' up just to make wash outs easy? This is just a 3 car daily driver garage - not a working garage..... Thanks

 

[James-W]

I like the vertical 2X4 idea spaced 16 inches on center. You can put up OSB and then put a layer of drywall compound on it. Then if you texture it, seal and prime it, then paint it with a good quality light colored paint, will look exactly like drywall. But since it is OSB you can hang stuff on it anywhere you want.

 

[hefnerconstructionlc]

Skip them both mand go with tin like your ceiling. Super clean, inexpensive, and already painted.

 

[James-W]

He could certainly do that, but he mentioned that he would like to be able to hang stuff on the walls. It would be difficult to hang things up with thin metal on the walls.

 

[Falcon67]

I used OSB, no regrets. Tough stuff, takes a beating. Drywall is for houses IMHO

 

[minytrker]

Have OSB walls and dont regret it either. I just put 1x2's or something similar on the wall and screwed the osb to it. Then primer and painted it. Doesnt even look like osb unless you look close.