Roof now covered in bright shiny clean reflective
2" foam board from RMAX, 27 a sheet, 48 sheets
fastened with 3" deck screws and fender washers
15 deg f delta between insulated roof and uninsulated roof
area during preliminary tests of 10 sheets.
WOW is all I gotta say...and it is only R13
total project with new asphalt, tar, flashing and Rmax
came on at $3200 for 1500 sq ft roof (15 square)...I figure
$2 a sq ft is pretty good DIY savings...esp since quotes came
in at $16,000 average/
Rich and Kate...and two screw guns and 3000 deck screws and washers!
--- In DoIt_Yourself@yahoogroups.com, "mountain953346" <mountain953346@...> wrote:
>
> After a month of pretty intensive research we
> are focusing in to make a decision to insulate
> our flat 1x8 tongue and groove roof on 10' centers
> of 4x8 open beams//circa somewhere in the early '60s
> without a ounce of insulation in the walls either!
>
> Thanks again for all the public and private input
> we have received, so we are back again for final thoughts
> before we launch the project.
>
> Our latest design we may go with is an R12 4x8x2 inch foam
> board at about $30 a sheet with white roll asphalt
> over and 3" flashing all around...we have about a 1500 sq
> ft roof and plan to use 20 sq of roofing for about a 30%
> overlap seal between rows covering the foam board.
>
> We are stuck on how to fasten it to the existing roof..we
> are thinking of 2 1/2 nails or screws with a 3/4 washer
> and driving through both the asphalt and the foam board
> into the roof boards without penetrating the roof boards
> of course. The foam board can take 20psi so walking on it
> is no problem.. foam board is not backed by OSB to reduce
> cost by 10 bucks a sheet. Cost is about $1600 for the
> foamboards, 1000 for the roll asphalt, 750 for roof
> sealant, nails, tool rental,etc total job w/o labor
> comes in about $4000. Contractor estimates we have
> received are in the range of $18,500 to 22,700
> so this DIY project has potential to save big bucks
> (I am retired so no problem...labor is free...LOL)..
>
> Any thoughts on the efficacy of this plan? THe fasteners
> need some input?
>
> Thanks,
>
> Rich and Kate,
> San Diego,Ca 20 miles inland so it gets HOT! buts cools
> off at night nicely...used to have $500 a month A/C costs.
>
| Reply via web post | Reply to sender | Reply to group | Start a New Topic | Messages in this topic (2) |
No comments:
Post a Comment