Hello! I’m Ana, a mother and homemaker from Alaska.
Skeching
100’s of FREE plans!!
You can make ANYTHING!
stick
img
sticks
img

Venting

October 25, 2012 |

Missed a Momplex Post?

We are DIYing our moms a Duplex in Alaska! Check out our progress so far as we owner build a home, step by step. Read the Momplex blog here.

posted by Ana White

Are you having Momplex withdrawals?

Guess what?

We are too!

Winter is here to stay this year in Alaska, and we are so thankful that all of our outside work has been completed for the year.  We did not get the decks on, but we did pour the deck footings, so decks can go up before the ground thaws in June.  

Inside, we did not get to where we wanted to be by winter.  We were hoping to have the ceiling drywalled and insulated, but with a little thing like oh a first book releasing we had some scheduling conflicts.  So we are pretty happy with being darn close to a fully insulated Momplex.

In our last Momplex post, we foamed all gaps, cracks, doors and windows in the Momplex to fully seal all the walls in.  Then we put foam baffles up to keep the blow in insulation in the ceiling.

So after all this hard work to carefully seal the Momplex in, inspecting every square inch of the walls for any holes, filling even the tiniest cracks with foam ... what are we going to do?

Cut some giant holes in the sides of the Momplex, of course!

Venting

Because the Momplex is so airtight, we must consider how we can get the moisture out or the Momplex will have mold problems.

Top offender?

Bathroom shower of course.

And this baby promises to do the trick.

Venting

The bathroom fan/light combo in installed in the studs in the ceiling of each bathroom. We placed them in the center of the bathrooms. Of course, there will also be a vanity light for better light over the sink.

The fan/light combo will suck moist air up and out. But we will need to duct that moist air outside the Momplex.

Venting

Since we are going the blow in insulation route, we are using metal vent pipes. The flexible pipes can collapse under weight of the blow in insulation. This means the Ram will be up fixing it, wading through thigh deep blow in insulation. The Ram does not want to do this. So we are using metal vent pipes.

Venting

The pipes just snap together at a seam.

Each pipe has a flat end and a crimped end so you can join them together.

There's the crimped end.

And the flat end.  

The crimped end just fits in the flat end.

So you can get a longer pipe.

Venting

And you can get elbows and adjustable elbows and lots of other different types of transitions to make the pipe go anywhere you choose.

Venting

All joints are screwed together.

Venting

You use a special metal stitching screw, at least three per joint.

Venting

Ah, tape. Yes, tape.

If you can tape, there's a job for you in construction. Seems there's some sort of tape for every step! Vent pipes are not exception.

Venting

The joints are taped off to prevent air leaking out.

Venting

This is actually pretty simple to do.

Venting

For the longer strips of pipe, sometimes it makes more sense to join them down on the ground. One thing to be careful of is considering if the pipe is going to be maneuverable up into the rafters as a long pipe, or if smaller sections would make more sense.

Venting

When possible, we joined the smaller pipe pieces into larger ones on the ground just because everything is easier to do while you aren't balancing between trussses, eight feet off the ground. The joints are screwed together.

Venting

And then all seams are taped.

This is one high security vent pipe. That moist air doesn't have a chance against the Ram!

Venting

And because this is the Momplex .... everything you do ... you get to do twice.

There's one Mom's bath vent.

And the other Mom's bath vent.

And then of course we had to put in range hood vents to vent their stoves.  These we just stub down over the ranges.

And where do they all go?

The Ram cuts big holes in the sides of the Momplex.

Yep, all that careful insulating just to cut 6" holes in the sides of the Momplex.  

The pipe is a little short, and we will need to cut pipe to fit.

We just use the tin snips to cut the pipe.  

Put the pipe together and tape it off.  But we have a problem now.  Both ends of the pipe are flat and no end is crimped.

So out comes a crimper, basically just a fancy pair of tin snips (ie metal scissors) 

And the pipe end just gets crimped.

That'll work!

Outside, vent cover kits are used to transition the pipe to the outside of the Momplex.  Air can only go one way - out - through these vents.

Bye bye moisture!

My book is on its way!!

Hi Ana
Just got an email from amazon to say my copy of your book is on its way!! Yahoo...
Glad you are home safe and sound,
JoAnn
info7miner@gmail.com

posted by JoAnn (not verified) | on Thu, 2012-10-25 17:06
clips
birdsandsoap's picture

So glad the next installment

So glad the next installment has begun.I was about to start getting the shakes, lol.

posted by birdsandsoap | on Thu, 2012-10-25 17:36

Thanks for the Momplex Fix!

We have been having Momplex withdrawals. Thanks for the update. We are so glad the outside work is complete. Now you can concentrate on the inside. And of course, more furniture plans. And kitchen cabinets.

posted by S J (not verified) | on Thu, 2012-10-25 17:43

Pointers

Few things to consider before you button up the ceiling.

Insulate the vent pipes for the bathroom. Even though you got them close to the joists which will get them buried in the blown in insulation, you should still insulate them first so they don't "sweat" from the warm air.

You want to also make sure the pipe is always angling down to the outside for the longest run as the moist warm air condenses and you don't want it dripping back inside.

Last tip, the covered hoods you used on the outside are more for dryers then bathroom vents. Unless that wall is hit straight on with wind all the time, I would switch to a 3 door flap style as my personal preference. The main reason is those dryer style will want to flap in the wind with a cross breeze creating an internal suction on the pipe and on a windy night you can hear the draft guard on the fan end flapping. Also in my experience, the single flaps tend to freeze shut easier from moist air then the 3 door models.

posted by Chris McG (not verified) | on Thu, 2012-10-25 19:09

You never, ever can have too

You never, ever can have too much insulation. I perfer soffit vents for bathrooms, water will run down hill, and if water forms, the sofit vet should let it fall away, but i then agian i live in VA and our winters are fairly mild. Please correct me if i'm wrong... That the only way i learn.

posted by James (not verified) | on Fri, 2012-10-26 07:45

Pointers

Few things to consider before you button up the ceiling.

Insulate the vent pipes for the bathroom. Even though you got them close to the joists which will get them buried in the blown in insulation, you should still insulate them first so they don't "sweat" from the warm air.

You want to also make sure the pipe is always angling down to the outside for the longest run as the moist warm air condenses and you don't want it dripping back inside.

Last tip, the covered hoods you used on the outside are more for dryers then bathroom vents. Unless that wall is hit straight on with wind all the time, I would switch to a 3 door flap style as my personal preference. The main reason is those dryer style will want to flap in the wind with a cross breeze creating an internal suction on the pipe and on a windy night you can hear the draft guard on the fan end flapping. Also in my experience, the single flaps tend to freeze shut easier from moist air then the 3 door models.

posted by Chris McG (not verified) | on Thu, 2012-10-25 19:09
clips
Ana White's picture

Great Pointers!

Thanks for the great pointers! So that's why the Ram blocked close to the vent to make it higher - makes total sense! Will definitely look into your suggestion on the 3 door flap style, thank you!

posted by Ana White | on Thu, 2012-10-25 23:07
clips
Guerrina's picture

Wonderful!

Thank you for updating! Even though I knew you were on the book tour, I automatically kept checking for Momplex action...go figure! "Pointers" addressed my question of the angle as my neighbor's didn't get the correct angle and it drips back through the light.

Ciao!

Guerrina

posted by Guerrina | on Thu, 2012-10-25 21:06
clips
Juanita_r's picture

venting!

When i saw the title of this post, my first reaction was... what has got ana so upset that she has to vent thru a post, i hope all is ok..... then i read it... Now it makes much more sense, what do they say, never judge a book by its cover ;-) . so glad your home safe, hope the cooler weather gives you a chance for a well deserving rest! Juanita
P.s. loving the book, not just the plans, but all the additional information... so helpful, especially the metric conversion on the back cover, what a time saver. you're a genius Ana!!!

posted by Juanita_r | on Fri, 2012-10-26 01:30
clips
logangb345's picture

I'm so glad to see a Momplex

I'm so glad to see a Momplex update! I knew winter must have started up there in Alaska, and I was fearful that you guys hadn't gotten far enough this summer to work through the cold. I'm glad to see you did! I'm also glad to hear your book signing trip went so well! I wish I could have attended an event. As always, keep up the good work. We're rooting for you!

posted by logangb345 | on Fri, 2012-10-26 03:29

Holes

What did you use to cut the 6" holes in the side of the house? A hole-saw?

I was also curious as to why you ran both lines to the same side of the house. Wouldn't it be a shorter run to just mirror the apartments?

posted by Matt_the_guest (not verified) | on Fri, 2012-10-26 09:17

Gable end venting?

I see you have gable vents and that you put the fans there too - even though it would be much shorter to go up through the roof. Is that because of the amount of snow you get? We live in north-central Alberta and we decided to go out the gable end for the bathroom fan, but we had roof vents installed when we had our roof re-shingled last summer. I had no idea the flexible venting could collapse under the weight of the cellulose - my insulation guy actually put it in that way. And I'm pretty sure he didn't angle it downward to the outside. :(

For the person that mentioned exhausting the fan out through the soffit - I hear it's a bad idea. If you have continuously vented soffits the warm air might just re-enter the attic via the soffit. I saw a recommendation for 3 ft unvented soffit on either side of the exhaust vent if you choose a soffit vent.

posted by Alberta (not verified) | on Fri, 2012-10-26 10:33

Welcome Back!

Welcome back, Ana! I really enjoyed your visit to Seattle and love the new book.

posted by Trevor (not verified) | on Fri, 2012-10-26 12:06

I was totally having

I was totally having withdrawls! So glad for a momplex update :-)

posted by Kelly G (not verified) | on Fri, 2012-10-26 16:13
clips
tracysmith's picture

YAY!!!

Glad you're home and sorry to hear about the flu... get feelin' better!! How can you work without coffee? ;-) Seriously, hope you feel better soon! I'm already starting on a project that was in your book. So excited to have it and I love to show people and I tell them to get one!!!

http://www.simply-designed.us/blog

posted by tracysmith | on Sat, 2012-10-27 02:48

congrats on your book, so

congrats on your book, so happy to see another nuts n bolts post for the momplex. i love especially that you give the whys and wherefores (tight insulation = mold; wading through thigh-high inso to inflate collapsed vent pipes) which most pros do not. also good to see your trademark step by step pix.
i have to mention again how much just the knowledge that you and your fam are building this house for the moms helps me work on the idea that this is a good old world.
thanks again. come back soon.

posted by jeannette (not verified) | on Sat, 2012-10-27 11:18

congrats on your book, so

congrats on your book, so happy to see another nuts n bolts post for the momplex. i love especially that you give the whys and wherefores (tight insulation = mold; wading through thigh-high inso to inflate collapsed vent pipes) which most pros do not. also good to see your trademark step by step pix.
i have to mention again how much just the knowledge that you and your fam are building this house for the moms helps me work on the idea that this is a good old world.
thanks again. come back soon.

posted by jeannette (not verified) | on Sat, 2012-10-27 11:18

Bath Vents Automatic?

Are these bath vents going to automatically turn on when the humidity rises?

posted by Anonymous Coward (not verified) | on Thu, 2012-11-01 12:32

Ha! The picture at the end

Ha! The picture at the end just brought back a crazy memory for me. My Grandma had lived in a house for several years, when she realized that she didn't know where her dryer vent lead to. There were no vents for it on the outside of the house. She called the homeowners association and told them she had no dryer vent. They scoffed at her, this little old lady who obviously didn't know what she was talking about. She pestered them until they sent somebody over, and sure enough, there were no vents on the outside of the house. Turns out that the dryer vent was installed, and then the builders put siding over it on the outside of the house! They quickly called a contractor to come out and cut through the siding. There was so much lint and heat in there, that they said it was a miracle that my Grandma's house hadn't caught on fire yet. While DIY can be a nightmare, at the end of the day, you know exactly where your vents lead, you know you used quality supplies, and you know that some idiot didn't side over your vents or make some other obvious mistake that could be dangerous and cost people lives! And if you ever do need to go through and fix anything, you'll know exactly where it is and what to do. That's pretty cool! :)

posted by Jenn Hoff (not verified) | on Fri, 2012-11-02 13:08

Marlborough Locksmith

I'm usually to blogging and i really appreciate your content. The article has really peaks my interest. I'm going to bookmark your web site and hold checking for new information. and just want to say to that you have done a very good work.


Meriden Locksmith

posted by AnovasoztasialoSp | on Mon, 2013-01-28 00:15

Recent comments

Social

Let's Connect

Tweets

  •  

User login

Not Much >>

What's going on up here in Alaska.

Momplex Cam >>

Momplex Cam >>

We are DIYing our moms a Duplex in Alaska! Check out our progress so far as we owner build a home, step by step. Read the Momplex blog here.

Special Thanks

The free content provicded by this website is made possible by the following current sponsors.  Thank you!


   

Momplex Vanilla Kitchen Plans and How-Tos


Check out how we DIYed a full kitchen here!

Momplex
Momplex
Momplex
Project Plan
Momplex
Project Plan
Project Plan
Momplex
Project Plan
Project Plan
Project Plan
Momplex
Momplex
Project Plan
Project Plan
Momplex
Project Plan
Project Plan
Momplex
Momplex
Momplex
Momplex
Project Plan
Momplex
Video
Momplex
Momplex
Momplex
Project Plan
Momplex
Momplex
Project Plan
Momplex
Momplex

Handmade Holiday Gift Plan Tutorials

Project Plan
Project Plan
Project Plan
Project Plan
Project Plan
Project Plan
Project Plan
Project Plan
Project Plan
Project Plan
Project Plan
Project Plan