Do you guys use layout software to figure this out, and do you make accurate measurements to input. Because the guy that came out from Lowes rounded everything up room by room, added up the sq ft in his head and then added 15%. He says because of the pattern match he needs nearly double the sq ft. I think he doesn't know how to figure it out. Advice please.
Did he measure with a standard tape measure or an electronic tape measure?
The electronic ones can record the measurements then a program can put the measurements into a house layout, sorta like a blueprint. Those programs can do seam layout and who knows whatever else.
If the carpet is a low pile patterned loop pile It can take a lot of extra carpet to reduce the number of seams. Some types of pattern carpet don't seam up well, so reducing the seams makes for a better looking job.
It's hard to tell without seeing your actual layout and choice of material if the guy was overestimating. If he added 15%, then doubled the amount of material required, I smell fish. If however he doubled the square feet of all of the room dimensions it's a different story............ tho still seems excessive.
If a room in the house measures 10 feet by 16 feet, that's 160 sq
feet. If 15 foot wide carpet was purchased, it's possible that you may need a piece of carpet 16 feet long and 15 feet wide to do that room in order to keep the carpet running the same direction as the rest of the house............... that room requires 240 sq feet, not 160 sq feet as simply measured wall to wall.
Now if you chose 12 foot wide carpet, the room would need 192 sq feet. Add a 36 inch pattern match to that room and you may now need 228 sq feet. 228 sq feet is a lot more than the simple room dimensions, but that may be the actual amount needed.
Without additional information on the room dimensions and carpet type, it's hard to tell if the guy is on the up and up.
Less seaming means a better looking job most of the time, just request that all left over carpet
that you purchased remain on the job site.