I just put together a bid for a job. Here are the details:
1 story building
165' x 175' outside measurments with a Kynar gravel stop at all 4 sides.
Current roof is a ballasted EPDM which is shrinking badly.
That is over some kind of insulation whcih I did not core but seems too to be too thin since it is over fluted metal deck.
My proposal:
Remove the gravel and dispose.
Cut back the edge of the roof to eliminate the shrinkage effect, but leave the EPDM in place. Maybe also cut back from the curbs and boxes as necessary.
Install new 45 mil TPO Mechanically attached over 1 1/2" ISO insulation. I suppose I could do EPS, but I am bidding ISO for now.
Flashing details include: 4 soil pipes 0-6" boot. 14 4x8 curbs. 12 flu pipes to be field wrapped. 10 4x4 curbs. 4 interior roof drains. 2 2x2 curbs.
When all is said and done I figure I am goign to need to order 300 squares of membrane, plus accessories, 9000 6" screws, 5000 insulation plates, 4000 seam plates and 70 pieces of kynar steel gravel stop. The price seems low at what comes up to be: $113k.
Material is going to cost me about $45k. If I use a per square price for the labor it comes up real high at 800 man hours or 20 working days
That's where I am stuck. The sale price seems ok, maybe a wee bit low. The man hours seem ridiculously high! I'm just guessing since I haven't done a TPO this big.
Comments?
1 story building
165' x 175' outside measurments with a Kynar gravel stop at all 4 sides.
Current roof is a ballasted EPDM which is shrinking badly.
That is over some kind of insulation whcih I did not core but seems too to be too thin since it is over fluted metal deck.
My proposal:
Remove the gravel and dispose.
Cut back the edge of the roof to eliminate the shrinkage effect, but leave the EPDM in place. Maybe also cut back from the curbs and boxes as necessary.
Install new 45 mil TPO Mechanically attached over 1 1/2" ISO insulation. I suppose I could do EPS, but I am bidding ISO for now.
Flashing details include: 4 soil pipes 0-6" boot. 14 4x8 curbs. 12 flu pipes to be field wrapped. 10 4x4 curbs. 4 interior roof drains. 2 2x2 curbs.
When all is said and done I figure I am goign to need to order 300 squares of membrane, plus accessories, 9000 6" screws, 5000 insulation plates, 4000 seam plates and 70 pieces of kynar steel gravel stop. The price seems low at what comes up to be: $113k.
Material is going to cost me about $45k. If I use a per square price for the labor it comes up real high at 800 man hours or 20 working days
That's where I am stuck. The sale price seems ok, maybe a wee bit low. The man hours seem ridiculously high! I'm just guessing since I haven't done a TPO this big.
Comments?