 DraimanLet me see those devil horns in the sky
join:2012-06-01
Kill Devil Hills, NC
 ·Verizon FiOS
| reply to MaynardKrebs
Re: Attic flooring said by MaynardKrebs:1) Check with a structural engineer to see if the exiting joists can carry the load you intend to carry up there. The same joists carry a bathroom and 2 bedrooms right now. 
--
IF YOU FIND ANY MISTAKES IN MY WORK...Please consider that they are there for a purpose. I try to please everyone and there is always someone looking for mistakes! |
|
|
|
garys_2kPremium
join:2004-05-07
Farmington, MI Reviews:
 ·callwithus
·Callcentric
| said by Draiman:said by MaynardKrebs:1) Check with a structural engineer to see if the exiting joists can carry the load you intend to carry up there. The same joists carry a bathroom and 2 bedrooms right now. And storage can greatly exceed the load per square foot compared to living space. All depends on what you're storing, how close you'll pack it and how high it'll be piled.
Boxes of feathers, no issue. Boxes of barbell weights, not so easy. |
|
DraimanLet me see those devil horns in the sky
join:2012-06-01
Kill Devil Hills, NC Reviews:
·Verizon FiOS
1 edit | said by garys_2k:said by Draiman:said by MaynardKrebs:1) Check with a structural engineer to see if the exiting joists can carry the load you intend to carry up there. The same joists carry a bathroom and 2 bedrooms right now. And storage can greatly exceed the load per square foot compared to living space. All depends on what you're storing, how close you'll pack it and how high it'll be piled. Boxes of feathers, no issue. Boxes of barbell weights, not so easy. It's of no consequence either way. It was never in the scope of this thread to debate doing it or not. There's a 100% chance it's happening. The only question was lumber, OSB, or plywood.
After talking to the lumber yard they can rip plywood for me at no charge and will do 5/8" CDX (recommended size) for $26.99/ea including tax and delivery. That's within the SBA guidelines they said.
--
IF YOU FIND ANY MISTAKES IN MY WORK...Please consider that they are there for a purpose. I try to please everyone and there is always someone looking for mistakes! |
|
garys_2kPremium
join:2004-05-07
Farmington, MI | reply to Draiman
Re: Attic flooring For your own safety you should at least ask the architect who designed your garage about how much you can safely store there. He may already have those joists at near max. load with how he designed it. |
|
DraimanLet me see those devil horns in the sky
join:2012-06-01
Kill Devil Hills, NC Reviews:
·Verizon FiOS
1 edit | said by garys_2k:For your own safety you should at least ask the architect who designed your garage about how much you can safely store there. He may already have those joists at near max. load with how he designed it.
What does the garage have to do with the house? They have separate joists as they are completely different structures. I think your confused. The garage joists were oversized a LOT so there's no way in hell weight will ever be an issue in the new garage. The new garage attic space is already floored so it couldn't even be the subject of this thread.
--
IF YOU FIND ANY MISTAKES IN MY WORK...Please consider that they are there for a purpose. I try to please everyone and there is always someone looking for mistakes! |
|
garys_2kPremium
join:2004-05-07
Farmington, MI | Ah, I missed that, sorry. I was only concerned that you may cause an unsafe situation, I guess that was unwise. |
|
 tschmidtPremium,MVM
join:2000-11-12
Milford, NH
kudos:8
 ·G4 Communications
·Fairpoint Commun..
 ·Hollis Hosting
| reply to Draiman
said by Draiman:I was just talking with a co-worker who suggested just using standard 1" x 3" strapping since it's cheap. I don't mind the labor but would that work?
If this were my attic this is what I would do.
Since you have a small access portal and all you want is crude subfloor for storage I'd use dimensional lumber rather then plywood. IMHO 1x3 strapping is too narrow. I'd check with your lumber yard to see what they have that is cheap but wider, 1x6s are ideal. Since this is not tongue and groove lumber each piece needs to be able to fully support whatever load is placed on it. A crappy 1x3 with a big knot in the middle of a joist span means your foot might go right through the board.
Using dimensional lumber rather then plywood also makes it easier to add wiring or plumbing later since you only have to pull up a few boards in critical locations rather then large sheets of plywood.
/tom |
|
DraimanLet me see those devil horns in the sky
join:2012-06-01
Kill Devil Hills, NC | reply to Draiman
I just priced out 1x6, 1x8, and 1x12 lumber. It's out of the ballpark sitting around $850-900 for the project where plywood is around $425. |
|
garys_2kPremium
join:2004-05-07
Farmington, MI | An advantage of plywood is that the layers provide redundancy, defects are much less likely to go "all the way through" than with non-laminated products. |
|
 AVDRespice, Adspice, ProspicePremium
join:2003-02-06
Onion, NJ
kudos:1 | reply to garys_2k
said by garys_2k:For your own safety you should at least ask the architect who designed your garage about how much you can safely store there. He may already have those joists at near max. load with how he designed it.
min 2' prestressed lw. conc. panels with piers framing into heilical piles in the basement.
--
* seek help if having trouble coping
--Standard disclaimers apply.-- |
|
 DKSDamn Kidney StonesPremium,ExMod 2002
join:2001-03-22
Owen Sound, ON
kudos:2
·Bell Sympatico
| reply to Draiman
What effect will the flooring have on heat transfer from below? All wood has an R value. You have water pipes up there. Right now you are heating the space from below. What impact will that new floor have on the ambient temp of the attic space if you create a dead air space (insulation with the flooring (more insulation)?
You may also have moisture/condensation problems. You appear to have no soffit venting, with the insulation plugging that air space up. I would describe that attic as a mould farm just waiting to happen. Attics have air circulation for a reason. That seems to be a dead air space.
--
Need-based health care not greed-based health care. |
|
DraimanLet me see those devil horns in the sky
join:2012-06-01
Kill Devil Hills, NC Reviews:
·Verizon FiOS
| said by DKS:What effect will the flooring have on heat transfer from below? All wood has an R value. You have water pipes up there. Right now you are heating the space from below. What impact will that new floor have on the ambient temp of the attic space if you create a dead air space (insulation with the flooring (more insulation)?
You may also have moisture/condensation problems. You appear to have no soffit venting, with the insulation plugging that air space up. I would describe that attic as a mould farm just waiting to happen. Attics have air circulation for a reason. That seems to be a dead air space.
It's dead air space with or without flooring. The other side has flooring that's been there since about 1960 with no issues. The water pipes have been there since around 1970 with no issues. I just had that rigid board installed in 2012 to do it right but over 40 years of it being wrong and it's still there working fine. That new work doubled the R value from about R15 to about R30. Not worried at all about pipes freezing, weight, dead air, or anything else crazy people can come up with only flooring and that it's already decided to be 5/8" plywood.
Thanks to everyone for the help. That concludes this thread. 
--
IF YOU FIND ANY MISTAKES IN MY WORK...Please consider that they are there for a purpose. I try to please everyone and there is always someone looking for mistakes! |
|
robbinPremium,MVM
join:2000-09-21
Leander, TX
kudos:1 | reply to DKS
said by DKS:You may also have moisture/condensation problems. You appear to have no soffit venting, with the insulation plugging that air space up. I would describe that attic as a mould farm just waiting to happen. Attics have air circulation for a reason. That seems to be a dead air space.
You should research conditioned or unventilated attics. It has become more popular in recent years. |
|
DraimanLet me see those devil horns in the sky
join:2012-06-01
Kill Devil Hills, NC
1 edit | reply to Draiman
*removed* |
|
DKSDamn Kidney StonesPremium,ExMod 2002
join:2001-03-22
Owen Sound, ON
kudos:2 Reviews:
·Bell Sympatico
| reply to robbin
said by robbin:said by DKS:You may also have moisture/condensation problems. You appear to have no soffit venting, with the insulation plugging that air space up. I would describe that attic as a mould farm just waiting to happen. Attics have air circulation for a reason. That seems to be a dead air space.
You should research conditioned or unventilated attics. It has become more popular in recent years. In my environment, it's a non-starter. Attic air circulation and insulation are done for a reason. It actually cools the house. That being said, I have lived in old houses with rooms like that which are insulated and not vented properly, with wood floors. Hot as hell in summer and cold as a an ice cube in winter, even with air conditioning and heating.
--
Need-based health care not greed-based health care. |
|
DKSDamn Kidney StonesPremium,ExMod 2002
join:2001-03-22
Owen Sound, ON
kudos:2 Reviews:
·Bell Sympatico
| reply to Draiman
said by Draiman:said by DKS:What effect will the flooring have on heat transfer from below? All wood has an R value. You have water pipes up there. Right now you are heating the space from below. What impact will that new floor have on the ambient temp of the attic space if you create a dead air space (insulation with the flooring (more insulation)?
You may also have moisture/condensation problems. You appear to have no soffit venting, with the insulation plugging that air space up. I would describe that attic as a mould farm just waiting to happen. Attics have air circulation for a reason. That seems to be a dead air space.
It's dead air space with or without flooring. The other side has flooring that's been there since about 1960 with no issues. The water pipes have been there since around 1970 with no issues. I just had that rigid board installed in 2012 to do it right but over 40 years of it being wrong and it's still there working fine. That new work doubled the R value from about R15 to about R30. Not worried at all about pipes freezing, weight, dead air, or anything else crazy people can come up with only flooring and that it's already decided to be 5/8" plywood. Thanks to everyone for the help. That concludes this thread. You miss my point entirely. The soffits are unvented. There is little air circulation. You will have issues, I believe. Mould can develop over time. Watch for black.
--
Need-based health care not greed-based health care. |
|
DraimanLet me see those devil horns in the sky
join:2012-06-01
Kill Devil Hills, NC
1 edit | reply to Draiman
Please refrain from derailing the thread with off topic stuff. You should know better then this! |
|
