Vermiculite Removal

A recently-purchased 1910 farm house had no access to attics, and cause to not trust hidden weatherization and wiring. A first attempt of access through the floor found tough shiplap sheathing, and rain of vermiculite within a dust-containment barrier. That vermiculite, diluted in drywall dust, was tested and tentatively found to have less than 1% asbestos content.


This temporary access was then cut through a low wall, and an excessive dozen vermiculite  samples were collected in a mapped circuit of the attic. An area of 300 sf was found to have vermiculite depth 2" or less, and repair needs via a good drop-down ladder were found. Four samples were tested, and all were found to have less than 1% asbestos content.

To me, the 13" by 14" opening was sufficient for many further entries. It passed the 55-gallon drum liners that would collect the vermiculite and the usual roof debris. For any other worker, and for disposal, the planned ladder must be completed.












Please find several posts about 55-gallon drum liners. 
As generally mentioned in this blog, Label Vermiculite .
Distributing or Hauling-Out Loose-Fill Insulation (includes ordering info)
55-Gallon Drum Liners, Again 

Know these collapsible containers 30-mil thickness stand upright for loading. Nearly-full of vermiculite, the carry is a bearable forty pounds.

An area was emptied and then carefully vacuumed, that would contain the ladder. Twist connected wires from a wall switch to snipped knob and tube wires are among problems that will demand professional rewiring.


I of course do not work at any time without a suitable respirator.

The 14' span of 2x4 joists demands strengthening to tolerate any load in addition to the weight of shiplap and 1/4" drywall, and to allow a cut joist. I therefore must empty and clean the attic all the way across, and bridge out a minimum of interfering knob and tube wires.

Beyond the vermiculite, note poor sealing of balloon-frame outside walls by stapled foil-faced insulation. The floor was reasonably-well insulated, but an enabled energy audit will find important work needed in-attic, to insulate outside walls.

My dual-filter Porter Cable 7812 vacuum has 99.85% filtration efficiency. It was resident outside the attic, until the ladder was in. Then I mostly worked with the ladder door closed behind me. I will edit this post to address things I did wrong.

Jump ahead here, to a condition after debris has been carried down the new ladder. The floor is extremely rigid, far stronger than found, with framing in-effect 2x10 select fir. 9" strips of CDX plywood wall-to-wall are attached to the 14' found joists and to 13' 4" added 2x4's leveled to hold plywood flooring. Deck screws at 6" intervals make the attachment. The assembly locks a sag of nearly an inch at mid-span of the floor joists. At a stopped condition for electrical service, all floor area is again insulated, with R8 fiberglass batts minimum.

I like the disposal policy in metro Portland, Oregon, where vermiculite tested at under 1% asbestos, may be disposed as trash, at the Oregon City transfer station. Vermiculite at greater than 1% asbestos would have been handled by a licensed abatement contractor, with disposal at the adjacent hazardous-materials facility.

200 gallons.


A trash hauler might be arm-twisted to accept this. I doubt it. Placing it in a drop-box dumpster would have to be approved, and might raise concern and refusal in further handling.

Thoroughly wetting the vermiculite will reduce concerns on the further path to an Eastern Oregon landfill. I understand that vermiculite holds water. Much effort is needed to dry wet test specimens.


I will feel less bad about my contribution, than should disposers of bulk, where there has been no step of recycling.






I ask that Portland's Metro add receiving requirements for vermiculite, as "special waste." The application for this costs $25, and I think that is fair. Dock workers should not accept my unsubstantiated word, and they do not have means of recording permissions. In this case, special waste might have special handling: the wet-down requirement.


I was prepared here with a blank application, but wanted to experience the permitted procedure, and was happy to save my customer the $25.

Back at the job site, others will appreciate the wonderful Calvert attic ladder. It is Model 1028, with 28" x 48" rough opening. It includes my first try of the optional insulation panel to R14.


Little toe room remains when upon steps over the door. That is where good toe engagement is most needed. Assess lost safety, vs. achieved savings in heat transmission through the door. Consider Insulation Math. The door area for heat transmission is 28" x 48", 1344 sq in, 9.3 sq ft. Say claimed R14 is a system number including convection resistances, and without the cover, system has R7. The savings differential for Portland, OR is 2.4 *9.3 * (1/7 - 1/14) = $1.59 per year, and the savings will continue indefinitely. This beats the achievement of a foolish ladder cover. On the other hand, the $1.59 savings are probably foolish where offset by danger of falling with the lesser toe space.


At August 2015, add to this a photo album link . See what bags of bad vermiculite looked like, before they were dumped in an attic. I wonder, was all vermiculite, whether testing OK for disposal, or not, sold in these same bags, in, say, the Portland, Oregon market? What would a bag of good vermiculite have looked like, in your community? In my community, I think bad old Zonolite from Libby, Montana, often tests as good for disposal, and should. I am so happy where I can get it out of someone's house affordably. Is good vermiculite, not from Libby, MT, always good?


Please find all posts at this blog, about vermiculite removal, by Label search:

Vermiculite 

More Floor Sealing Examples

Again, please go to this web page:
https://sites.google.com/site/phillipnormanatticaccess/Home/pdf-offerings


Here please  pick the document posted 4/9/2011, titled Floor Sealing. The pearl here is insight to the installation of a GE microwave oven with kitchen vent feature.


Both posts this date invite comment to a blog. If you find the read worthwhile, please say so.

Better Bath Fan Installation

Two lengthy dissertations will be presented, if one bothers to follow the links to a web site, where content is in pdf documents. Please trust that many will find useful discovery. In this post, I link to Panasonic bath fan installations, which include a better way to construct through-roof vents.


Please go to: 


https://sites.google.com/site/phillipnormanatticaccess/Home/pdf-offerings

Please pick document posted 4/9/2011, Replace Bath Fan.


This parallels a blog posting and link to a Picasa Web Albums slide show:


http://productinstallationhowto.blogspot.com/2011/03/panasonic-fv-11vq5-bath-fan.html

New Construction Knee Walls

This home built year-2000 has garage roof trusses rising to second-story roof level. It gives contrast to thoughtless knee wall construction where insulation was an afterthought. The wall shell is closed with tightly-fit 1/2" OSB. (The second-floor ceiling and attic floor, still with insulation pour on drywall, remains thoughtless and dangerous in such grand new housing. I head toward hard-shell covering of attic floors too. Insulation may stay at rest against gravity. Heat and misstepping persons, do not.)

The OSB shell was planned for in the design of trusses. I presume 2x6@24" joist bays are over-filled with R21 batts opposite the OSB. 

This fits checklist, FRAMING Critical Details, www.northwestenergystar.com: "All knee walls are backed with a rigid material or other supporting material (e.g. wall to attic, skylight shaft, wall to porch roof, staircase to attic) (Thermal Bypass Checklist, Items 2.3. 2.4, 2.5). 

This example conflicts with Energy Trust of Oregon Weatherization Specifications for existing homes, where no exterior wall is required, and in its place is called: WA 1.5—Open Wall Open walls that separate conditioned from unconditioned space, such as in garages that face a conditioned space, shall be sealed for air leakage, insulated to a minimum of R-15 (or the cavity must be filled), and covered with a vapor permeable air barrier to limit human contact - - - 

It is NOT about human contact, but only the overfill and retention of insulation. An outside barrier that can not pressurize contained insulation, has no value. I am distressed that contractors in Oregon are compelled to place house wrap in this application. There instead should be movement toward complete hard containment, as in new houses.


Better than this simple hard containment, recognize too there may be insulation opportunities with crossing layers, achievable from the "back" side. A framer of a new house might not fathom the needs of an insulation installer. OSB pre-applied as in photos above, will have difficult application to better insulation of skylights.

55-Gallon Drum Liners, Again

This builds upon a post of April, 2008:
http://energyconservationhowto.blogspot.com/2008/04/distributing-or-hauling-out-loose-fill.html


They aren't just for hauling trash, and distributing insulation. Here, I needed to bag insulation, to drag it past a tight obstruction. I could drag three 24"x48" R30 batts in each transit.

Here a messy bed of R19 cellulose interfered with provision of storage in an attic. Things dropped from a deck, into loose-fill insulation, are lost. The central half of the attic floor was cleared into drum liners. Cellulose depth at the periphery would then be doubled, in an upgrade of the attic to R38, adding only batts under decks.

More area at the periphery was tossed clean of cellulose to repair deficient floor sealing, and bare areas were then refilled from the drum liners.

The air duct in the photos above is the supply to a Heatilator gas fireplace, added after house construction. The duct was thoughtlessly placed at a soffit vent, with removal of a vent baffle. With displaced cellulose, the baffle was reset, now using 2x4 blocks instead of just tapping in nails. It was interesting in this young house, to see confirmation of some of my ideas for older homes. Baffles should be plywood. Never cardboard or polystyrene. Kneewall closet walls are solidly clad outside with plywood or with OSB sheathing.

More Skylight Shaft Insulation

This skylight had about 25% effectiveness of applied R21 kraft-faced insulation. We must learn to do better. Place base insulation intimate with drywall, and then retain a thicker outer wrap.

For better presentation of these photos, please refer to the supporting content at Google Photos:

https://photos.google.com/album/AF1QipMtEKCz9c5-8Dspgg_7vJDsDwVvoRcPIlEoK-4 

Pick Label: Skylight Insulation here or at bottom of post, to see continuing innovation, now always with plywood or OSB hard covering.

Roof Cross Braces

Getting around in an attic is sometimes made difficult by head bangers, there for uncertain reasons. The function of ties under a roof peak, between roof joists, is to resist uplift and ruin of a roof, in storm conditions. Some will think the purpose of ties is as found in code requirement of collar ties not more than one third distant from tops of walls, to the roof peak, to hold walls in absence of ceiling joists. Collar ties will have little relevance to residential construction.


Here is a slide show review of the problem, and some solutions.


Here is another view of the solutions, in a web page.