Need help maximizing my Apple network reach

Question

I've been reading through the discussions here for a while now looking for a similar issue to mine and haven't quite found it so I'm hoping the knowledgable people here may be able to help.
I have a somewhat complex/convoluted setup that I'm hoping to simplify.
My ISP (Fios) router is located in the back corner of my basement. Attached to that is a 48 port (Netgear) switch which sends hardwired ethernet cables throughout my entire house.
The Fios router does have a wireless network which covers most of my basement but not well as the signal coming out of the boiler room is quite weak.
On the main floor I have an Apple Time Capsule which is hardwired from the Netgear switch. This provides a wireless network for most of the house. It's set to "create a wireless network" and is in "bridge mode" (this wireless netowrk has a different name from the one the Fios router creates)
The signal from that TC does not reach all of the main floor and is weak upstairs as well so I have an Airport Express hardwired (from the Netgear switch) which also "creates a wireless network" in "bridge mode". This is a 3rd wireless network from the other (TC and Fios router).
When i 1st got the Express, I tried to use it to "extend" my main floor network but was unsuccessful in doing so. The signal was too weak to reach the location i need to have it in. Also, I thought I was giving away too much in terms of speed by not taking advantage of the fact that I can have the AE hardwired.
I'd love to have a single wireless network throughout the house which would aid in controlling my devices (we have 3 appleTvs througout the house which are also hardwired) and would allow me to access my wireless printer from anywhere (currently only accessable when I'm on the main floor network).
I'm up for buying another AE (for 99 bucks it's totally worth it) and relocating basestations.
I'm thinking I need a roaming network but because my switch which provides ethernet cable to my house comes off the Fios router, I won't be able to set one up. If this is the case, can I put a new Express (or TC) in line after the Fios router but before the switch to then have an Apple device essentially servicing the ethernet?
Am I missing some other aspect that may make this easier?

Answer 1

I'm thinking I need a roaming network
I agree, and you're 99% of the way there already. All that remains for you to address is this:
(this wireless netowrk has a different name from the one the Fios router creates)
Fix it: provide the exact same network name and security settings for each network created by your Time Capsule and Express (as well as any future Expresses you may want to add). Your devices will "see" one and only one network, despite that there are in fact three separate networks created by those three devices. Make absolutely certain their network names and security are precisely the same. If necessary, temporarily use a simple network name until you confirm that everything works the way you require.
Clients of your wireless network will more or less seamlessly drop connections as they move from an area with a relatively weak signal and connect to a stronger one.
my switch which provides ethernet cable to my house comes off the Fios router,
That is actually the correct way to do it: FiOS > router > 48 port switch > all your wired devices, including Time Capsule and Expresses, each configured as bridges.
Given the fact that your FiOS wireless router is in a basement boiler room (a common location for such equipment, yet it's hard to imagine a worse one) its wireless range is bound to be poor. You may wish to disable its wireless completely, for simplification as well as to eliminate its possible contribution to wireless interference.