Search: Posts Made By: pgriz
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Replies: 3
Views: 842
Posted By pgriz

Gutter positioning is important

If you are in the snow-belt, the snow will slide off an aluminum roof. Gutters that are positioned for an asphalt roof generally have to be lowered when changing to aluminum. We use the rule that...
Replies: 6
Views: 13,130
Posted By pgriz

Good, better, best vents...

Regarding venting, a lot depends on your location: are you in the snow-belt or sunbelt, and what is the direction of prevailing winds.
In the snow-belt, mushroom vents are often covered up by snow...
Replies: 5
Views: 1,305
Posted By pgriz

What's an aluminum composite roof?

I work with aluminum shingle roofs all the time, but what's an aluminum COMPOSITE roof? Is it made up of panels or shingles? Is there an airspace below the roof surface? Who makes the roofing...
Replies: 8
Views: 1,817
Posted By pgriz

Vapour barriers...

Although the vapour barrier was invented around 1938, it was not until the 1970's that it became a common feature in home building. In Canada, the vapour barrier did not enter the building code...
Replies: 8
Views: 1,817
Posted By pgriz

Disagreements...

Bestmetalroof, you are entitled to your opinion. The "myth" you refer to has resulted in two of my customers in the past three years having to have resheathing done. In both cases there were gable...
Replies: 4
Views: 2,441
Posted By pgriz

Soffits...

If you don't have soffits but a "smart vent", then you need to figure out exactly how big it (they?) is and how many of them you have. That will help you determine if you have enough intake air.
...
Replies: 4
Views: 2,441
Posted By pgriz

Argggh!

Bebop, the bathroom vent should be vented directly to the outside, usually with as short a vertical pipe as is practical. This way, the moist air in the pipe will be outside before it can condense. ...
Replies: 8
Views: 1,817
Posted By pgriz

Soffit Vents

You appear to have exhaust vents, with the gable vents providing the air intake. This configuration does not vent the area of the attic below the level of the gable vents. If your vapour barrier is...
Replies: 3
Views: 761
Posted By pgriz

Condensation

Hi yrret,

In North America, the accepted practice is to have a vapour barrier on the warm side of the insulation, preventing moist air from reaching the cold space (attic), and effective...
Replies: 19
Views: 3,865
Posted By pgriz

Soffit Construction

The soffits are usually just sitting inside two opposing channels (one along the house and one along the edge of the eave), with the seams oriented from house to eave. There is usually at least one...
Replies: 19
Views: 3,865
Posted By pgriz

Installing Styrofoam channels

It can be done either way. However, if the slope of the roof is relatively shallow (say, 5:12 or less), then it can be difficult to get access to the areas near the eaves from the attic. So in...
Replies: 5
Views: 53,982
Posted By pgriz

Trig

If you remember your trig functions tan(A) = Y/X, where Y is the vertical rise (6 in your example) and X is the horizontal run (12 in your example). The calculated angle is 26.565 degrees. Or, in...
Replies: 4
Views: 1,079
Posted By pgriz

Pipe Insulation

You want the same amount of insulation around your pipe as you have in your ceiling. Say (for example) you have R-30 in your ceiling - you should have a similar amount around your pipe. There are...
Replies: 4
Views: 1,079
Posted By pgriz

Condensation

What you are describing appears to be condensation. The exhaust tube in the attic is not insulated, and as the warm & moist air from the bathroom is blown up the exhaust, it condenses on the tube...
Replies: 10
Views: 961
Posted By pgriz

How to...

Access to the attic depends on the slope of the roof. Lower slopes make it difficult to work from inside the attic, and sometimes the only way is to remove the sheathing from the hard-to-access...
Replies: 10
Views: 961
Posted By pgriz

How to...

There may be other choices, but to get both ventilation AND insulation when you have limited roof space to work with usually means going to the outside. It is always a good idea to have an engineer...
Replies: 10
Views: 961
Posted By pgriz

Vaulted Ceilings

For your situation, in our area we would recommend a second roof deck. If possible, the insulation would go under the original deck, and the new deck will be 4-5 inches higher than the old deck with...
Replies: 10
Views: 961
Posted By pgriz

Your theory is valid

It is pretty common to find that inadequate ventilation was keeping in some heat. Bring your insulation values to the levels recommended for your area, make sure that the new insulation does not...
Replies: 19
Views: 3,865
Posted By pgriz

Thank you for the update

Site, thank you for the update. Frustrating, isn't it? I had a similar experience when I tried to hire some electricians and plumbers. I did my homework and had a very specific list of things that...
Replies: 19
Views: 3,865
Posted By pgriz

Ventilation

XSleeper, for someone who claims not to know much about ventilation, I think you are being 'way too humble. You're given a very clear exposition on the subject. :)

Site, if the soffits are...
Replies: 19
Views: 3,865
Posted By pgriz

Venting...

44 ft. of ridge venting in your situation is better than the minimum, and providing you can ensure you have enough intake, you should be fine with the ridge vents and still block off the side vents....
Replies: 19
Views: 3,865
Posted By pgriz

Ventilation... Continued

To see if your soffit ventilation is effective, one way is to get into the attic, turn off all lights, and see if you can see any light shining up from the soffits. If it's dark all around, you do...
Replies: 19
Views: 3,865
Posted By pgriz

Location, location, location

The answer partly depends on where your house is. If it is in the snowbelt, then I would recommend passive ventilation, soffit to ridge with no side vents. If you're in the warm areas, a heat or...
Replies: 1
Views: 1,704
Posted By pgriz

Wet spots...

OK, he said it was dry, but did YOU go up with him and check? Brown spots usually mean water has soaked wood and is leaching tannin. Do you have a vapour barrier behind the drywall? If not, why...
Replies: 3
Views: 1,365
Posted By pgriz

Not all leaks can/should be fixed...

Since sloping roofs are designed to shed water (as opposed to be absolutely water-proof), it is not unusual to have some entry points that are only reached by water when the volume is high and the...
Showing results 1 to 25 of 107
 


 
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