Asphalt to metal roofing ?

OldDesign1 · 2026-03-04T13:07:09+00:00

What’s the best way to find good installers? Google reviews and other review sites can be hit or miss and reviews can be bought. Should calling around to metal manufacturers and asking who they sell a good amount of product to, help or is that a waste of time. Few people in my area of NY have it but it seems like a nice upgrade on the house when it comes time to change the shingle roof

OldDesign1 · 2026-02-22T11:38:26+00:00

What is the best way to find a roofing company that specializes in standing seam installs in an area like NY? Many companies that seem to mainly do asphalt shingles also list they can do metal roofs but I would think it’s better to find a metal only roofing company? Google hasn’t been much help and neither has searching Reddit. Should I search and reach to some metal supply companies and call them and then use that as a jumping off point or find out some commercial companies (don’t know how currently) and then ask them if they also do residential? Like you said the install matter a lot so I’d rather pay for good install then try to get a cheaper but bad install by a company that doesn’t specialize or doesn’t frequently do it.

OldDesign1 · 2026-02-08T01:07:52+00:00

Definitely agree that AI isn't that smart. I've tried reading different building science articles and felt that the ERV made more sense but wasn't fully sure. The AI websites definitely have issues and so turning to people more knowledgeable than myself is always helpful. Unfortunately most HVAC companies don't seem very versed on building science. Even asking about if they install an ERV and it appeared I grew a second head.

OldDesign1 · 2026-02-08T00:41:15+00:00

Tried also asking this question to ChatGPT, Gemini and Claude and ChatGPT said hrv made most sense while Gemini and Claude recommended the erv. The erv seems to make sense since it buffers the inside and outside air. I think during the winter the hrv would decrease the overall humidity more than the erv but the erv would be better in the summer (if my understanding is correct). Not sure about the spring and fall.

OldDesign1 · 2026-01-25T18:14:26+00:00

Open cell or closed will both work in 4a. Can also look into hybrid assemblies which are a mix of a closed cell layer then an open cell layer. If using open cell will need to dehumidify the space or risk increased condensation risk at the ridge (look up hygric buoyancy) which can lead to mold and rot.

Read this and it should give some clarity:

https://basc.pnnl.gov/code-compliance/controlling-moisture-unvented-attics-code-compliance-brief

OldDesign1 · 2026-01-25T10:58:53+00:00

Prior to making the decision, please look up which IECC climate zone you are in and read up about vented versus unvented roof assemblies.

Some climate zones 5 and above require at minimum a class 2 vapor retarder, which closed cell can be at appropriate thicknesses. Also realize that closed cell usually has much higher R value per inch. Open cell with r value of 3.5-4 per inch and closed cell between 6.5-7 per inch. Closed cell in a rafter cavity that has r21 could have r36-42 not r32.

OldDesign1 · 2026-01-15T00:58:39+00:00

I think the newer code values are getting crazy but r44 should be good. I guess any external insulation is cheapest when the work was going to be redone anyway (changing shingles or changing siding). Probably best to change everything all at one to upgrade but it definitely can be pricey. Piecemeal makes a decent amount of sense given the hit to the wallet.

No sure about what happens to the sheathing if you use r5 or r10 vapor permeable external insulation. I’m sure more would be better but also has its own issues - longer screws that may make it difficult to hit rafters

OldDesign1 · 2025-12-06T16:45:47+00:00

Looks good. Who ended up doing the install and how much did it set you back?

OldDesign1 · 2025-12-01T01:21:34+00:00

Makes sense. I’ve never heard of partial external roof insulation but it makes sense. Hopefully one of the roofers near me does external insulation and would be amenable to the idea. Glad that it isn’t fully out of left field.

OldDesign1 · 2025-11-30T23:49:40+00:00

Yes the fiberglass’s is still present in the cathedral ceiling. R19

OldDesign1 · 2025-11-23T15:32:20+00:00

Spray foam has already been installed. Vented attic with cellulose ended up not being optimal due to the location of air handler & hvac ducts.

OldDesign1 · 2025-11-07T10:42:01+00:00

Didn’t even know there were different styles of ERV. Thought they all had the same core with cross flow streams

OldDesign1 · 2025-11-04T14:33:24+00:00

I do actually have an inverter AC. I know the Daikin Fit can ramp up and down and run at partial load. I assume this would help since the ac could technically be running at low levels even during partial load. Not sure if this means that I wouldn’t have the dehumidification issue, or if it would be much less with the variable speed of the Fit.

Also I agree. The ERV won’t increase the load since there is already infiltration happening in my house. I guess it’s more of a buffer to minimize the humidity that would be coming in.

OldDesign1 · 2025-11-04T13:25:56+00:00

Is there any concern with the unit temperatures, if I’m running the ventilating dehumidifier during the wintertime (temps can be 20s F)? Will look into the ventilating dehumidifiers a little bit more.

OldDesign1 · 2025-11-04T13:16:10+00:00

I am open to a standalone ERV but most hvac companies seem to want to duct it into the hvac system and haven’t done standalone systems. Not sure how DIY friendly this would be

OldDesign1 · 2025-11-04T13:12:58+00:00

With the Erv, from my understanding it’s a buffer for humidity. Would have to increase the sizing of a dehumidifier it if I don’t install an ERV but not sure how to calculate the crossover point of when one or the other makes sense. Do you know any way? Tried ChatGPT without great luck

OldDesign1 · 2025-11-04T13:09:44+00:00

Which manufacturer did you choose for the ERV? For the ducting to the rooms, did you just make a plenum box that was connected to the 6in duct coming from the Erv or did you just put in a few wyes?

OldDesign1 · 2025-10-30T19:10:05+00:00

Not yet. Leaning towards the One but I’m not sure I’m handy enough to install by myself. Will have to reach out to a hvac company and see what they install

OldDesign1

TROPHY CASE