Aunt Martha is thinking about replacing the roofing material on her home and garage she has asked for your help. She is considering going green with the projects though she is not sure if the old buildings are up for the conversion.

Garage:

The garage was built by Uncle Fred sometime in the $1950$s$.$ It is a single story two car garage which he built using post and beam construction. The $4$x$4$ posts are set in concrete on an $8$ centers. The roof is relatively flat so in $2000$ your cousin slim replaced the built$-$up roof with a single$-$ply EPDM. The dimension of the roof are $24$ X $30.$

Martha would like to install a $6$ deep green roof and garden on the roof. There is no reason to tear$-$up the EPDM layer as it$$s in relatively good shape.

House:

The house has one layer of fiberglass shingles installed on the $6/12$ pitched gable roof. The shingles are old and need to be replaced. She$$s considering installing a $20$ gage metal roof because it$$s on sale at Menards and the metal can be recycled with replaced. While the roof is torn up she would like to add $16$ of wool insulation to cut down on the drafts. The house is a traditional platform framed walls $2$X $4-8-0$ studs $16$ on center. The roof and ceiling with are $2$X$8$ rafters on $16$ on center. The square footage of the roof is $1800,$ ceiling is $1200$ square feet.

What is the net weight change for each structure if Aunt Martha selects the green roof for the garage and metal roof and insulation for the house?

Garage $\_\_\_\_\_\_\_\_\_\_\_\_\_$ lbs$.$

House$\_\_\_\_\_\_\_\_\_\_\_\_\_\_$lbs$.$

What should be considered before proceeding with the changes she has requested? What advice do you have for her?