Category Archives: Electrical

A Final Look at House Infrastructure – First Floor

At the front of the house, there’s a gang of switches, and the electricians had to demo the plaster in this area to run the new wires. All of the casing around the doors and windows has been removed, as well . . .

Our powder room wall is more infrastructure pipes and wires than it is framing . . .

To the south of the powder room, the pantry walls house plumbing and electrical, including bundles of electrical wires running up the end of the new wall from the electrical panel below to supply the second floor.

Rough-ins for the south end of the kitchen:

And electrical, gas, and the hood vent to support elements on the west wall of the kitchen:

The kitchen walls also house hydronic infrastructure elements. Here, the red, radiator supply and return lines for the master bedroom travel up the kitchen bump-out wall:

You can see a 360-degree view of the first floor (in the gloom resulting from boarded-up front windows) at:

As with the second-floor walkthrough videos, this one does nothing but reinforce the exceedingly geeky interest we have in the renovation details. However, it does provide an interesting view of the house infrastructure elements in a different context.


Posted by on May 15, 2012 in AC and Hydronics, Electrical, Plumbing


A Final Look at House Infrastructure – Second Floor

The exposed-infrastructure stage of home renovation is drawing rapidly to a close. Insulation and drywalling activities are looming (they’re actually already here, it’s just that our posts are woefully behind), and it’s time to take a final look at the exposed house elements before they’re forever entombed.

On the second floor, there’s a mess of plumbing, electrical, and mechanical elements in the utility closet between the hallway and the master bedroom. The placement of the air handler on the top floor (consistent with the pre-reno house) helps in AC distribution and minimizes the distance between this component and the compressor directly above it on the roof.

The utility closet also will house stacked, front-loading washer and dryer. The blue spot on the floor in the photo above is one end of the emergency drain line that exits directly from the side of the house in case the washer has an issue. Rough-in electrical and plumbing occupy the south wall of the utility closet for the washer and dryer.

The wall between the two upstairs bathrooms house all of the plumbing supply and drain lines and electrical rough-ins. All of the extra wiring supports subsequent pendant lights in the master bath and sconce lights in the guest bath.

The plumbing rough-in for the two bathrooms is identical: supply lines for flow control valves and fixtures for shower heads and hand-held showers and a thermostatic controller that supports both.

Lots of electrical rough-in elements surround the bathroom framing:

In-line fans mounted above the guest room rafters support both bathrooms. Because of the floor-to-ceiling glass doors on the showers, we need to vent moist air, and these remote fans take care of this nicely. The GC wanted to install routine bathroom ceiling fans, but this approach supported both showers and bathrooms, and were super efficient, so we went with this approach, spec’d by our first architect.

A subsequent picture of the fans appears below, after the insulated vent lines have been attached.

Electrical rough-in also had to contend with solid brick exterior walls in much of the house. The result was a collection of new pockets in the brick to accommodate electrical outlets that will poke through the baseboard in the guest room, pictured below, and all over the main floor, the subject of the next post.

You can see a 360-degree view of the south side of the second floor at:

And you can see the same for the north side at:

Both links are dorky as hell, but highly informative!

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Posted by on May 15, 2012 in AC and Hydronics, Electrical, Plumbing


Save the Bay(s)

As seen earlier (, one of the several dramatic steps to our renovation was our reluctant removal of the original second-floor joists across three quarters of the length of the house. The joists were pocketed directly into the brick exterior walls, and were perfectly sound, and so we really hated to remove them. However, the 1925 joists ran in an east-west orientation (from side to side in the house, rather than front to back). To route house infrastructure elements for our open floor plan design, north-south orientation was needed.

So, most of the old joists needed to go. They were replaced by the north-south oriented 2x10s that were supported by strategically placed glulam beams. The one area not affected by the new framing was the floor under most of the guest room at the front of the house. There’s no plumbing there (although there will by hydronic supply and return pipes supporting a radiator, as you’ll see), and we were able to develop a workaround to route the AC supply vents there ( As a result, leaving the original joists in place at the front of the house was a way to conserve costs (one of the precious few, we’ve come to realize).

Mechanical, plumbing supply pipes (copper, not PVC . . .), plumbing drain pipes, and electrical for the second floor all needed to live somewhere, and that somewhere would be the “bays” between the new joists installed during the renovation. This post provides a Cliffs Notes version of installation of the house infrastructure elements by way of the evolving bay landscape seen from below, on the first floor.

The picture below shows the joist bays after framing has been completed, but before any infrastructure elements have been installed. The triple beams and odd framing on the left side is there to support the showers on the second floor.

In the picture below, elements of the mechanical system begin to appear. One of the vents is orphaned in a bay on the far side of the bulkhead.

The vent is now connected to the AC supply line in the bulkhead, and has been joined by PVC drain lines.

In this view of the bays to the south, the mechanical and drain lines have been joined by copper plumbing supply lines. Note the framing to the right – the original beam arrangement had to be removed and reconstructed after the plumber started doing his thing, and they realized it would not allow pipes to be routed properly.

Electrical has now joined the other elements at this stage.

And what’s the electrical for? Among other things, the recessed lighting in this area, which has been installed at the point this picture was taken. The rearrangement of framing under the showers also solved a lighting design issue. With the original framing, we were not able to install lights in the locations called out by the plan. With the new framing, this obstacle was removed, and both plumbing and lighting could be implemented correctly.