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11 Answers

Plumbing vents exiting ridge cap

Can't seem to find anything in the code, easily missed though. I have a customer who wants a metal roof installed however they have had bad experiences with pipe flashings through the roof and don't like the look of them. While I don't care for the pipe boots, (for metal roofing), appearance they seem to work well.

Anyway, to the question... Is there anything code or common sense wise that says vents couldn't go through the ridge cap? I know it wouldn't look as good but, would limit water flowing over them.

In Building Code Questions | Asked By RMills Miller | Nov 21 14
5 Answers

Mod-con forced hot water system that squeals

My plumber recently replaced the boiler in my small 3-zone Colonial with a Lochinvar WHN-85 boiler with a Lochinvar SIT 40 indirect water heater. Seems to work well, but I've been having trouble with noise.

First, the boiler occasionally emitted what I called a foghorn noise out of the exhaust pipe (the plumber opined it was a French horn). The solution was to tune the mixture to the rich side of the specified range (i.e. more gas per air, and more CO2 in the exhaust), which made it go away.

In Mechanicals | Asked By Daniel Griscom | Nov 19 14
10 Answers

Crawl space encapsulation

Hey Folks - I know the topics has been covered but I am still scratching my head and need some clarification and I will but this project to rest.

Crawlspace Encapsulation

I live north of Seattle, WA. in Bellingham - I believe it to be Zone 4a (Marine Zone)
I have about 1000 sq. ft. of crawlspace I am beginning to encapsulate.
I have no bulk water issues.
I have 12 mil SilverBack liner for the walls and 20mil SilverBack liner for the earth.
I found a great deal on new Polyiso fiberglass faced rigid foam board 2" thick. (Firestone ISO 95)

In GBA Pro help | Asked By William Lucrisia | Nov 17 14
1 Answer

High R-value CMU?

They are claiming R 19.5 on an 8 inch CMU. I guess they are adding up inches of EPS and not deducting for the LARGE thermal bridging effects:

http://www.emcoblock.com/products/block/omni-block-high-r-block.php

I'm not crazy am I? This is outlandishism in terms of r value performance?

In Energy efficiency and durability | Asked By leo kloop | Nov 22 14
4 Answers

Has anyone found a window that meets passive house standards and also carries an ASTM impact rating for the 110 mph zone?

So far the only thing I find that's close is from Dynamic.

In Green products and materials | Asked By Carole Hunter | Nov 20 14
2 Answers

Dense packing an eyebrow roof

I have a small eyebrow roof below a shed dormer on the back of my cape style house. The dormer runs for about 25 feet across the back of the house. The roof is attached to the wall studs instead of using the proper construction which calls for the wall to be sheathed first and then the eyebrow rafters attached to a ledger board across the sheathing. I have batt insulation in the wall that is exposed to the roof and to the soffit vents that are cut into the eave below the eyebrow.

In Energy efficiency and durability | Asked By Michael Lee | Nov 21 14
4 Answers

Is this ridiculous?

We live in a 1600 sqft 2 level end unit rowhouse with structural historic masonry walls from the 1890s.

Housing is really expensive where we live, figure between $400-500 per square foot, so we're trying to balance efficiency & comfort with sacrifices of this valuable square footage. We have a crawl space and attic, and intend to condition both so we can run ductwork without replacing the joists on the second floor.

In Green building techniques | Asked By Mike Madowitz | Nov 21 14
3 Answers

Vent separations and strategies

I'm building a home where I'm venting a high efficiency propane forced air furnace, a HRV (stale indoor/fresh outdoor), an on demand water heater, and a propane dryer from a mechanical room in about 8 feet of horizontal wall area. Additionally, I'm spot ventilating a range hood and bathroom fan on adjacent walls. My biggest concern is that I have dry fresh air for the HRV. There aren't any windows to really worry about and the mechanical room is on the first floor of a two story home so I can go up with some of the vents.

In Mechanicals | Asked By Jack Nichols | Nov 20 14
64 Answers

Do I really need 4 minisplits?

My wife and I own a lot in a development in the Pacific NW (Zone 4c), and we are planning to build our retirement house on it. We have never built a house before. Our projected house (which we designed ourselves) is 1,833 sq. ft. on one story, a modified California-style bungalow, as simple in geometry as we could make it.

In General questions | Asked By Gordon Taylor | Jan 23 12
54 Answers

Dealing with mold on the inside of OSB sheathing

Zip code 53951, south central WI, zone 6a.

Working in non-perfect situation - occupying unfinished house and can't afford to finish it up in timely manner. Heated by central air furnace with supplemental wood burning stove heat. Plan is to finish walls first and after we can afford to do the infloor heat, finish ceilings (2 stories to do)

Moved in early October, found mold about week ago (late February), when moved some fiberglass for new electrical box. Still recovering from the shock...

Here is wall profile, all new materials:
- (no siding yet)

In General questions | Asked By Nick Zees | Mar 3 13
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