Roofs (rooves?) are dangerous! My husband called his parents on Sunday, then walked up to me and said, "I'm going to my parents' house tomorrow to keep my father off the roof!" A man in his late 70s with health problems has NO business up on a roof!  Hubby finished the repair in less than an hour and his mother "paid" him with lunch and a new polo-style shirt. 
Back to the eggs: what current breeds does your friend have?
I have three pens of hens that are currently laying. 
Pen April:  Ameracuana rooster over two sisters that are half Dominique and half Ameracuana (probably different mothers, so half-sisters). The hens lay slightly green-tinged eggs, but they are looking more blue as the season progresses. Babies would most likely lay a blue egg with only a green tint. 
Tractor Pen:  Ameracuana rooster over two hatchmates hens. The hens are probably not half-sisters. Would make olive-eggers IF the eggs are fertile.  The mothers of these hens are most likely White Rock. One is the daughter of the Dominique. The other looks like she got the RSL father. 
Pen June:  MPC all female assortment included: Barred Rock, Partridge Rock, Speckled Sussex, RIR, Black Astralorps or Black Jersey Giants (hard to tell) and lighter red that is either Red Sex Link or New Hampshire. Roosters are hatchmates, but doubtful they are half-brothers. Red looks like he has the RSL father and a White Rock mother. Blackie is definitely Black Hawk's son (Dominique). We think Blackie's mother was RSL because he has a lot of red leakage on his pretty black and white.  All these 19 hens and 2 roosters run together. It's been a long time since I've seen a non-fertile egg from this pen!