The group challenge takes the contestants to the roof of the Handyman Rehabilitation Centre, where they are to build a rain catcher from plastic tubing, vapour barrier, T-connectors and a bucket.
The rain catcher, in turn, will be needed to provide water to the sheds in upcoming challenges, as the Handyman Rehabilitation Centre lacks plumbing.
In the episode's group challenge, Jeff must lead the contestants to build a barbecue pit, using reclaimed bricks, bags of mortar mix and water collected from their new rain catcher.
The race, with Andrew as referee and everyone else watching, was close wire-to-wire, but Ruth was declared the winner after video replay as it took Jeff two more strokes (which he had claimed was "for insurance") of the hammer to drive his nail home.
The contestants in this challenge are tasked to build a triangular frame that would house a solar panel, which would power two lightbulbs and two wall outlets in their sheds, within 60 minutes.
The next step in shed building is electrical work, which they are given tutoring by Jill (who states simply, "White-on-white, black-on-black, no sparky-sparky" on how to properly connect wires).
If, at the end of the challenge, the lighting is faulty, Rob MacDonald, the show's own lighting technician who bet eventual "winner" Keith Cole ten dollars that he wouldn't finish the wallpapering before the time ran out in the final exam in the previous season (a bet Andrew also took, by the way), would help the contestants fix their faulty wiring.
On the other end, Jeff was named the worst due to his self-proclaimed perfectionism and his actual results leaving much to be desired, as well as refusing help from others when it was needed.
Without any environmentally friendly solution around vapour barrier to stop air movement, the contestants must install their (non-recycled) plastic on top of their insulation.
To prevent Justin from "butting in," he is consigned to a back room to watch alongside the experts while Candace does the actual priming job alone.
The contestants begin the challenge of applying the clay plaster over their primed wall by cleaning up their wasted products, totaling over 100 pounds.
In the end, Dica's new doghouse is a mini-shed (not unlike Terry's own, but in Ruth's green color) with a door that may be slightly too small.
As Harvey is absent, Angie takes over foreman duties and leads the five contestants into building a wood-fired hot tub from a pre-fab kit.
While Ruth and Candace mull over how to trim the benches to fit, Terry and Jeff focus on assembling the plumbing, which is initially correct even though neither had read the kit's instructions.
In this challenge, the contestants must install either a urinal (for the men) or a toilet (for Candace and Ruth) on top of their tile, while the nominators prime the shed.
The toilets are specially designed to turn human waste into compost for flower beds, while the urinals are entirely waterless (the only maintenance required is having to replace a filter every 7,000 uses).
In this episode, the experts focus on the fact that two persons are working on a shed at a time, and decide to name both a contestant and their nominator as the most improved and another pair the worst.
The extra lesson for the husband and wife is in a task meant for one—one must hold a tiny nail or a screw while the other must drive it into place.
In this challenge, the contestants must build a shelf that will house a set of speakers, their electrical panel, as well as the two batteries that will be storing the power to their sheds.
In this rematch (with Andrew, the experts, the nominators, the crew and their fellow contestants all watching—Justin even holding up a makeshift sign cheering Ruth on, with Candace, Jaime, Terry and Jill taking up the other front-row seats), the premise is the same, except that Jeff and Ruth will take turns hammering in their single nail to avoid the need for video replay.
In the first of the two-part group challenge, Jaime and Sheilla, as co-foremen, must lead the other eight cast members in insulating, sheeting and shingling the roofs in all five sheds.
In Ruth's shed (whose roof was done by the show staff), the main criticism was over her work in general, as she had done the fewest of the challenges (at one point, Andrew could tear down her trim with only one hand).
However, only Candace's shed will be able to move out in one piece, due to the height restriction of 9-foot-2-inch (2.79 m) (despite the doorway itself being 9-foot-6-inch (2.90 m) to allow some room for error)-- the four others must be cut down to size.
As part of the redesign, though, Ruth had asked for a three-foot increase in height, which was accommodated by the experts by adding a 3-foot (0.91 m)-high pony wall.
Although the poor workmanship is clearly shown (Jeff claiming that he had finished the fewest challenges correctly—which is not actually true as Ruth finished fewer), he is vindicated as his learning experience was well worth the trip (to support this, his troubles with the jigsaw in the Skills Evaluation and his use of a circular saw to cut metal for his roof are contrasted, as is his lack of knowledge of a drywall file during the tool test and his usage of one during drywalling).
Despite Jaime's claims, the experts actually consider Candace's shed to be the best, as it has a solid overall quality of workmanship and was the only one of the five to fully meet all the requirements.
While there were questions over exactly how much of the work was really done by Justin, Candace did learn that doing things is not as simple as it appears on television and she too is deemed not the worst by the experts (consideration was also given to her pregnancy, which made it impossible for her to safely carry out several of the challenges).
In the recap episode, the six sheds (the five belonging to the contestants, plus one built by the experts) are delivered to the persons who had bought them sight unseen on eBay.
Still, the spat during the TV installing challenge that caused Sheilla to finally go over the edge, but it gave them the opportunity to improve their relationship, cooperating to salvage their oversized shed using a plan that not even the experts and crew believed would succeed, thus rehabilitating him.
However, after becoming the worst in the second-to-last episode (leading Justin to give a more hands-off approach due to it being a factor), Candace finally learns that construction is not as easy in real-life as it is on TV, thus rehabilitating her.