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post #1 of 32 Old 05-19-2020, 03:30 PM - Thread Starter
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New Construction/Blank Slate

Hello everyone.

I am in the current process of building a new house. I have set aside an area in the basement that is eventually going to be a dedicated media/movie room. The internal room Dimensions will be 29ftx21ftx10ft tall. I know there is a "golden ratio" for length/width to height ratio. As far as HVAC goes, there will be a mini-split AC unit that is basically going to self contained inside of the room providing cooling. Any help would be GREATLY appreciated! i am still learning and trying to read on everything i can. The photo that i attached is what basement layout is going to look like. Everything in blue is set aside for the media room. All the green is 12" block that is filled full of concrete.

Thanks,
-Thomas
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post #2 of 32 Old 05-19-2020, 03:37 PM
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next step is do draw a scaled floor plan showing door, seating, screen, projector, and speaker placement. That will help determine what modifications and considerations you may need to make with construction. First thing is where do you plan on entering and will you need an elevated riser for seating? where will that go? Take a stab at drawing it up by hand and posting to this thread you've created.

I doubt that they will be using 28-29 ft long floor trusses to build your floor/ceiling so some additional support which is not on that drawing may be required, It could throw a monkey wrench in your plans. you need to know this quickly in case you need to head off a disaster like a support column in the middle of your planned theater room.

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post #3 of 32 Old 05-19-2020, 03:45 PM - Thread Starter
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Jeff,

I have a clear span basement. I have 30ft 24" floor trusses that are going to be sitting on the basement walls. So, all the is good to go. I basically have free range for the basement.
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post #4 of 32 Old 05-19-2020, 03:46 PM
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Wow, Any duct work hanging down for upstairs rooms?
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post #5 of 32 Old 05-19-2020, 03:53 PM - Thread Starter
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No duct work will hang below the floor trusses. I had custom floor trusses made that will have the HVAC ductwork inside of them. The ductwork chases run completely left to right. full span of the house. Here a near completion picture and one of the floor truss layouts.
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post #6 of 32 Old 05-19-2020, 04:14 PM
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OK, lets work on the floor plan, any notion of where you want the door and how many seats? What goes on the flip side of the stairs?

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post #7 of 32 Old 05-19-2020, 04:34 PM - Thread Starter
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The flip side of the stairs is probably just going to be an empty room right now. I might eventually have some saltwater tanks down there. the HVAC is going to go under the steps. Same with the water heaters. House is being wired for 400amp service with dual 200amp panels.

Looking at doing double walls between the steps and exterior north wall. So, it would be Doorway, room, doorway, then into media room. That room i would like seating for at least 10. To the left of the steps i am going to have that framed out already.

Here is my lovely paint skills... haha!
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post #8 of 32 Old 05-19-2020, 04:56 PM
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Are you thinking about reclining theater seats? two rows of 5 seats each is very doable in a 21 ft wide room, two rows of 6 seats if you pick the right model seats may be doable. Thoughts about the back of the room?
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post #9 of 32 Old 05-19-2020, 05:43 PM
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That's an excellent blank canvas. Looking forward to this one. You have space to work with I could only dream of.
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post #10 of 32 Old 05-19-2020, 06:37 PM - Thread Starter
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Jeff,

If I don't need the space in the back of the room then I would frame it off and make another room. I gave myself the biggest available room I could. I just don't know what the dimensions I need for awesome acoustics. But I am definitely looking at (I think) a 11.2.4 setup.
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post #11 of 32 Old 05-19-2020, 07:04 PM
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I think you would be quite happy with a 9.4.4 setup. put your subs in the four corners for most even bass response. Think about creating a projection room in the back to reduce sound and heat in the theater. You need to be careful of projector selection to handle the distance. 13.2 channels of processing is a lot cheaper than the processors capable of 15 channels. If your project budget can support the Trinov based 16 channel systems do it.

https://www.accessories4less.com/mak...-w/heos/1.html

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post #12 of 32 Old 05-19-2020, 08:20 PM - Thread Starter
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Jeff,

What would the dimensions need to be on that room to get correct sound? Or would I need to rotate the media room 90 degrees and make it a 21x15ft? If I went that route then I could easily build a projector room with the remaining 21x14 space? Or would you leave the orientation the original way I had it?

Thanks for all your help/advice!
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post #13 of 32 Old 05-20-2020, 04:54 AM
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one industry "expert" says rooms with the length 1.2 to 1.4 of width work well for overall design. If you want seating for 10 you shouldn't make your room narrower. By his guidelines you should consider a room 25.2 to 29.4. 3 ft at the back for an projector closet and subwoofer niches might work well. You should invest the time to watch this video (and there are two more) There is industry debate on his rear and ceiling speaker placement recomendations



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post #14 of 32 Old 05-20-2020, 07:20 AM
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This is a great space. You should be able to end up with an awesome theater. I would definitely go with Big's recommendation of a separate room for the projector and equipment - having those out of the room will help a ton with both comfort from a temperature perspective as well as from a noise/light perspective.

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post #15 of 32 Old 05-20-2020, 10:46 AM - Thread Starter
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I would like to get all of that inside of it's own room. The wife is trying to steal part of my theater space right now for a home gym. I got a lot of arguing to be able to keep my space to myself :-D
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post #16 of 32 Old 05-20-2020, 02:16 PM
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Quote:
Originally Posted by jtbadgett View Post
I would like to get all of that inside of it's own room. The wife is trying to steal part of my theater space right now for a home gym. I got a lot of arguing to be able to keep my space to myself :-D
Fight the good fight! We're with you lol

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post #17 of 32 Old 05-22-2020, 10:12 AM - Thread Starter
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haha... yeah! i am working on it! Slowly but surely she is starting to come around.
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post #18 of 32 Old 05-23-2020, 04:38 PM
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Where is the bathroom?
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post #19 of 32 Old 05-26-2020, 10:24 AM - Thread Starter
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Well, there wasn't a bathroom slated for the basement originally. I just got through plumbing in a half bath on the other side of the basement this weekend.....

Concrete is being poured Thursday, weather permitting.
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post #20 of 32 Old 05-27-2020, 11:43 PM
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Don't even think of reducing the size of the room you have. This is a great size for comfortable seating for 10 people. Let the wife make her home gym on the other side where you want to put saltwater tanks.

Read this thread if you have not already. Rob's theater dimensions are almost the same as yours.

Is there a reason you went with concrete blocks for the foundation instead of poured concrete walls?

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post #21 of 32 Old 05-28-2020, 09:58 AM - Thread Starter
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Concrete block walls were HALF the cost of doing poured concrete walls. I even looked at pre-cast walls from 2 different local companies and between the cost + crane rental. I was about $12k more than doing 12" block + rebar and poured solid with concrete.

I also got all the gravel leveled in the basement.... took 2 4-5hr nights. Now, i just need to put down the vapor barrier and pour!
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post #22 of 32 Old 05-28-2020, 01:25 PM
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I am constantly amazed (and emasculated) at the immense cross-over of people on AVS who have all three attributes: nerdy enough to LOVE home theaters, have the cash to do it, and most impressively...construction skills to actually do things themselves. I mean. Seriously? Weekend warriors doing plumbing, HVAC, electrical, trim work....??

I possess two out of the three...I can't build a birdhouse.

Sorry just a thought explosion after reading numerous build threads.
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post #23 of 32 Old 05-28-2020, 02:03 PM
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I spent a few minutes trying to figure out why the ceiling was black at this stage of construction, then it dawned on me that you haven't placed the ceiling joists. That is black sky. Good job.
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post #24 of 32 Old 05-28-2020, 02:35 PM
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I spent a few minutes trying to figure out why the ceiling was black at this stage of construction, then it dawned on me that you haven't placed the ceiling joists. That is black sky. Good job.
Hahaha same

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post #25 of 32 Old 05-28-2020, 02:37 PM - Thread Starter
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Talking

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I spent a few minutes trying to figure out why the ceiling was black at this stage of construction, then it dawned on me that you haven't placed the ceiling joists. That is black sky. Good job.
Jeff... i am working on the new infinite black roofing mod :-D

You can also see the bucket of my Kubota tractor in the doorway with a half bucket of gravel that we took out. I added WAY! to much gravel to the basement originally. I am excited for the almost 35 yards of concrete to be put in and it finished!
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post #26 of 32 Old 05-28-2020, 11:20 PM - Thread Starter
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So, As an update to the progress. I am starting to learn how to use google Sketchup and doing an "as built" dimensionally accurate drawing. The white box is my quick representation of the steps (will add them in later). The left side of the room is going to be the Theater room. I have added in a 2x4 wall with 1/2" sheetrock as a divider. So, this should give everyone a more "realistic" idea of what i am working with.

Any new suggestions or changes to those room dimensions will be greatly appreciated! I am going to start working on theater layout in the next day or so.

Thanks,
-Thomas
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post #27 of 32 Old 06-14-2020, 11:12 AM - Thread Starter
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I know i haven't updated this thread as much as i would like. The construction process has hit a few snags. Trusses were delayed a week and just got set Friday. Hoping to have first floor framed by tuesday. Crane will be here Wednesday to set 2nd floor trusses, and next Monday it will come back to set the roof trusses. Anyways! Here is what everyone here cares about the media room! The 2nd picture will be the wall the projector screen will be going towards. I know it has an offset, but i will frame that flush, and then either frame a second wall in front of the first, or i will just go with larger material framing for that portion of the wall.

The framed wall which you see now is the wall that is going to be finished next to the steps. I am looking at building a disconnected 2x4 framed finished interior wall just inside of that one to help eat up the sound. I would like to know thoughts/opinions on that? Or would you just stick with the single wall and just do double 5/8 rock and good insulation?

Thanks,
-Thomas
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post #28 of 32 Old 06-14-2020, 11:51 AM
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Double wall framing best in show first place, single wall with clips and channel second place. Neither you get a participation award.
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post #29 of 32 Old 06-14-2020, 11:58 AM - Thread Starter
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Well, we always strive for first place!

Would you frame over the concrete walls? Or would you just do sound absorption panels in appropriate locations? I am trying NOT to eat too much of the room up, but i guess do it right.. or not at all!

Thanks,
-Thomas

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Double wall framing best in show first place, single wall with clips and channel second place. Neither you get a participation award.
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post #30 of 32 Old 06-15-2020, 03:34 AM
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Hey mate - yeah that's a great space - nice one.

Had a quick play with those dimensions - I think it's what's been suggested here - I put a 720mm door at the back - not sure what the pros think of that space - too shallow?
It shows a possible 11.x.4 - or 9.x.4 if you remove the grey surrounds.

Looks like a 160' 2.39:1 screen would be good (depending on your preferences of course)

Just my two cents - playing around
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