Replies

1. 
   Piffin | Feb 21, 2003 03:03am | #1

   18" perfections laid at 6" will give you an extra 8-10% coverage. You will need about 29-1/2squares, plus waste - not sure what meant by net coverage - maybe you figured waste already.

   .

   Excellence is its own reward!

1. 
   Boxduh | Feb 21, 2003 06:09am | #2

   What I think you mean, Pif, is that "standard" exposure for the shingles is 5 inches, and that coverage is figured from that.  My net total area is something, let's call it 3000 square feet, and to that I have added a factor for starter courses and cuts at endwalls, gables, and openings, plus some waste.  My problem is that I have some guys that have not interpreted my quantity needs right, and have quoted "bundles" and "boxes."  Do the people making and packaging R&Rs have some quantity per box they all adhere to?  Does 74 boxes sound like 32 squares at 6" to the weather?

1. 
   MikeSmith | Feb 21, 2003 07:14am | #3

   WC are sold by the bundle.... R&R red cedars are sold by the box...

   the exposure for sidewall is usually figured for triple coverage... so 16" shingle , max exposure is 5" (+),  18" shingle  is 6" (-)...

   you need a conversion chart for number of boxes/bundles per square at various exposures.. but either way.. you will still be charged for the number of bundles / boxes you buy... the exposure is up to youMike Smith Rhode Island : Design / Build / Repair / Restore

2. 
   Piffin | Feb 21, 2003 07:43am | #4

   Actually, the standard for 18" Red cedars is 5.5" as boxed, to my memory. Those who sell have the conversion charts. If you know the exact brand, you should be able to track down their conversion chart online.

   If you calculate that you need 32 squares, I divided 3200 by 110 to come up with my answer.

   Most cedars are four bundles or boxes per square. Yours may be different

   For sidewall applications, you can go up to an 8" exposure with 18" shingles. so there is a world of difference in how you figure. This may be one case where you do well to be "Mr Micro"! Doesn't sound to me like 72 bundle will cover much at 6" Maybe they read the six as a nine. If typical usage was based on 5" coverage and you read a table up to nine inches, that would give about 72 bundles if there were four per square.

   Better have them confirm for you..

   Excellence is its own reward!

2. 
   MVAgusta | Feb 21, 2003 04:19pm | #5

   The boxed R&R "Square" is figured at a ridiculous 14" exposure. My local price on those is $100, but to compare them to #1's  you need to multiply by 2 1/2 to get the equivalent coverage/price ratio. 

1. 
   MikeSmith | Feb 21, 2003 06:17pm | #6

   RC R&R's (18") have the following coverage per BOX:

   50 sf @ 7"

   42 sf @ 6"

   34 sf @ 5"... you can interpolate between those exposures

   WC (16") BNDLS are 4 bndls pre 100 SF @ 5"..

    both should have the  recommended exposure that gives a minimum of triple coverage , so take the length of the shingle and divide by 3 and stay BELOW this number.. [18/3 = 6 (-)]Mike Smith Rhode Island : Design / Build / Repair / Restore

3. 
   booch | Feb 22, 2003 12:47am | #7

   Ratings on shingles and shakes are like boxing titles.

   Speaking only of split and sawn shakes I look at the 9 different factors and one brand is great and the other is merde'. I went thru better than 30 square of those and was surprised at the variance.

   I suspect that "perfections" are the sawn squared cedar shingles. Hopefully those are more standard.

   If you are suspicious I'd get the label from a bundle and compare the stats. There is an organization on the web that goes into depth on the specs. hit google for details.

   Jack of all trades and master of none - you got a problem with that?