Timeline for replacing pressure treated 1x4 boards on roof with non-pressure treated white pine - OK?
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Mar 4, 2020 at 20:41 | comment | added | Michael Karas♦ | I have some doubt that flashing epoxied to the galvanized metal will standup to wet and hot/cold temperature excursions on a roof. If you can afford it a copper sheet and soldered flashing would probably be better. Alternatively place the metal in the valley but cover it with two layers of that newer stick down roof shield material that self seals around nails and can also self heal to an extent. The material referred to as "Ice and Water Shield" available from various manufacturers. | |
| Mar 4, 2020 at 18:33 | comment | added | Craig Hicks | @MichaelKaras You are a prophet - a leak is exactly why I stripped it down and removed some planks close to the valley. Some of the plywood and "skip sheathing" planks (hope that's the right term) were not in good shape. Fortunately the rafters were solid - I applied hydrogen peroxide and then used a wire brush to remove mold stains - now the rafters look fine. - About the cricket, I was instead thinking of a galvanized metal valley with flashing expoxied on at either end so the water would escape safely to the adjacent sloping valley. Because a cricket is challenging. | |
| Mar 4, 2020 at 18:11 | vote | accept | Craig Hicks | ||
| Mar 1, 2020 at 20:47 | comment | added | Michael Karas♦ | From looking at your picture it looks like you have two roof slopes that come down toward each other. (Right where you have that shop vac sitting). If it were me I would build up a structure on top of the roof to create two additional slopes to eliminate that trough. Such construction as showing there is an invitation for leaks. | |
| Mar 1, 2020 at 20:42 | answer | added | Michael Karas♦ | timeline score: 1 | |
| Mar 1, 2020 at 19:35 | comment | added | Ed Beal | Redwood turns gray with age. But I agree with ecnerwal, creosote was the standard into the 70’s what you may have is old growth fur looking at the quality that was cants (junk wood for the day that is the outer slabs when squaring up quarter sawn lumber). Normally pressure treated is not used inside the house envelope. Some chemicals used in the past were quite toxic and today any pressure treated sold in CA causes cancer according to prop 65. | |
| Mar 1, 2020 at 14:41 | comment | added | Craig Hicks | @Ecnerwal - Then the reddish tinge is just the natural redwood color, redwood being the predominant building material of the time in CA. In which case the pine is perfectly adequate as a replacement. If you copy paste your comment as an answer I'll select it. | |
| Mar 1, 2020 at 12:45 | comment | added | Ecnerwal | I'd be shocked if they were pressure treated 85 years ago, particularly since they are not black with creosote, which was the most common preservative treatment at that time... | |
| Mar 1, 2020 at 8:50 | history | edited | Craig Hicks |
add tag "mold"
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| Mar 1, 2020 at 8:45 | review | First posts | |||
| Mar 1, 2020 at 13:19 | |||||
| Mar 1, 2020 at 8:44 | history | asked | Craig Hicks | CC BY-SA 4.0 |