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1 Answer

Main stack venting

I'm finishing tying in an addition to my existing slab on grade home and found the main stack vent on the existing house is about 6" into what will be a hallway.

The original house had a 3" main stack vent off the master bath, near where the drain exits the house to the septic. There is also a 2" vent on the other side of the house connected to the kitchen and another full bath. There is a 3rd full bath in the middle of these two vents. The original master bathroom piping has been capped and covered with concrete, except the main stack vent.

Asked By Mike M | Jul 22 17
5 Answers

Insulation and new codes

Planning a renovation and addition of an existing house;

1. Climate Zone 4 - the new insulation code for ceilings is R49. Is the only way to achieve this in 2x12 roof framing to use closed cell spray foam or rigid on the exterior? Client doesn't want to use spray foam. Working to match existing roof lines and not remove the existing roof. In order to match existing roof lines there is part of the ceiling that will also be the roof.

Asked By S G | Mar 3 17
3 Answers

Any experts in Title 24, Part 6 out there?

In replacing a wall and adding insulation (home was built in 1961 and currently has no wall insulation) I am also adding two small windows to this south-facing wall. Because I'm adding windows, I need to comply with either the prescriptive requirements of Title 24 or the performance requirements. Because I'm not adding conditioned space, I cannot demonstrate performance based only on the new space, but would have to demonstrate it on the whole house which is completely impossible without a gut remodel.

Asked By Domenico Perrella | Jun 11 17
5 Answers

How far apart must my HRV fresh air intake be from exhaust?

Just had an HRV installed and was expecting the fresh air intake to be on the front of my house because my furnace and water heater are vented on the corner of the side of my house. The installer used a 2 in one vent cover where the stale air and fresh air intake come out of one vent cover that is located 2 1/2 feet away from the first exhaust pipe. Is this safe or legal? How about if he adds snorkels to either the intake or the exhaust?

Asked By Lewberg | Jun 8 17
16 Answers

Shiplap in lieu of sheetrock - Questions regarding fire safety

I don't know if this is correct category to place this question in, but here's the deal:

Building a living unit in a section of a post-frame building. The exterior walls are constructed using the PERSIST method, with Grace Ice & Water shield covering the OSB, 1" foam on top of that. The stud bays will be insulated with poly-iso cut and cobbled, 3" thick.

Asked By John Peeper | Jun 2 17
13 Answers

Residential frost-protected shallow foundation in central Mass.

We are planning to provide a monolithic pour frost-protected shallow foundation (FPSF) for a single story 1300 sq ft 2 bedroom home in central MA. Air Freezing Index is 2000. I have read through many different case studies, research papers, codes, etc and there is a bit of conflicting and locale-specific info so I am looking to see whether I understand what is required here. I am a newbie owner-builder. Any constructive criticism would be appreciated, but I don't want to foment any religious wars.

Asked By Kenneth Gartner | Sep 2 16
2 Answers

Furnace cold air return requirement with HRV

New build in Ontario with Zehnder ComfoAir 550 HRV (home run system - not tied into furnace)

Does the furnace need traditional cold air returns in various rooms or can we just draw air back into the furnace directly from the basement (where the furnace is located)

The HRV is already moving air so not sure of the purpose of the cold air returns in this setup

Steve

Asked By Steve Babcock | May 12 17
1 Answer

I am going to put foundation drains around a detached garage. Where can I legally dump the water?

Is it legal to dump the water collected from the foundation drain into the gutters in the city streets?

Asked By Jschee | Apr 30 17
3 Answers

Permanent wood foundation (PWF) backfill height?

All the documentation I've found on PWF basements never shows insulation under the slab floor. The allowed back fill heights are always referenced to the bottom of the bottom plate of the wall which coincidentally is the bottom of the slab.

If under slab insulation is installed after the perimeter PWF walls are in place, the slab will be raised by the thickness of the insulation. With under-slab insulation is the backfill height the height above the slab bottom? or the bottom of the bottom plate?

Asked By Jerry Liebler | Apr 17 17
3 Answers

Deck footers

Good evening Everyone,

I'm attempting to build my first deck this spring. I've dug holes for footings and just passed my footing inspection.

The Deck code here in maryland dictates that holes are to be a minimum of 30" deep with an 18" wide by 10" deep concrete footing. Once you have that you can either use concrete piers to get your posts out of the ground or you can place the post right on the original footing.

Asked By Andy Pappas | Apr 17 17
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