Roofing Underlayments EXPLAINED by a roofer: Tar Paper, Synthetic, Ice and Water Shield

Why roof needs Roofing Underlayment? Tar Paper, Synthetic, Ice and Water Shield Difference
Comment below if you have any questions about roofing underlayments or tell us what is best!
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From Insights:
00:00 Intro
00:32 Purpose of underlayments
01:16 Asphalt/felt/tar paper
02:00 Synthetic felt/underlayment
03:02 Ice and water shield
03:50 High temp ice and water shield
04:52 Base sheet

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[jfavreau]

I have shingled a few hundred roofs in my time, taken off shingles 30 plus years old tar paper under them was in amazing condition could have reused it(but did not) the huge benefit of the new underlay is the strength, it will not tear off the roof on a windy day if installed correct, tar paper tends to tear off. My experience.

[RoofingInsights.]

What kind of crazy underlayments have you experienced?

[doc_ineeda_win]

did my whole roof underlayment in ice and water, in case i ever do solar ... great vid

[gary]

It would be good to talk about code requirements for ice barriers and where they are required to be used. I would also like to see you go over the correct way to install a drip edge on the eave and gable ends of the roof. A lot of roofers do not understand the concept of protecting a roof from back up especially if you have gutters. The membrane is taken over the edge and down behind the drip. Then the drip is installed followed by flashing tape to seal the leading edge of the drip.

[Gsnoop]

Very informative! I learned alot I needed this because I am facing having to put a new roof on.

[lh]

I’d like to see a video of real world testing of underlayment. Putting 15# felt paper, 30# felt paper, synthetic paper and ice and water down then soak it with artificial rain aka a hose and see how protective it is and for how long. That’s a video I’d give a thumbs up to.

[madroofer]

underlayment serves 3 purposes ...temporary roof until the roof is installed ....moisture barrier and prevents shingles from sticking to the decking

[sergioroldan]

I honestly start working on the roofing industry for more than 30 years, and I think the best underlayment that we recommend is# 30 pound tar paper!!

[shawncummings]

Please explain how any underlayment other then ice and water sheald is water proof after I just put 8 thousand nail holes in it. Truth is under payment is a vaper berier. Most roofing will sweat on the underside, with the change of temperature. Hens the term vaper bearier.

[shayj]

My 6 yr old roof bit the dust in Hurricane Ian in FL. My insurance adjuster said it was in good shape. I lost all the cap shingles and more. An independent public adjuster told me I need a new roof that the gutters are FULL of gravel or whatever you call it to not clean it out it’s evidence. We had 8 hrs of 150 mph winds for 8 solid hours. I’m trying to educate myself but so confused. I want to know what questions to ask when choosing a roofer. Probably 1 in 3-5 houses here are tarped or have a new roof. 😮

[bubbajones]

I went with 1/2" ZIP with taped seams and a poly underlayment.

[forrestbehr]

Awesome. Never thought of using base as an underlayment. Thanks.

[gilbertrosales]

I was look for a simple was and cheep way to seal up a roof that I got to remove peel and stick and I heard you asking about the fiber glass under lay ment I have used for my torch down roof cover over &I used fiberglass under lament on a motel roof over, the roof was the old style rubber mat style small pitch flat roof, it was wrong down but still in good shape it just need a top cover I used some cold process adhesive and used the fiberglass felt or under lay ment, for the top cap, the fiberglass mixed in whit the felt gives the rool a dark gray look with the white fiberglass, the tools are 36" wide so when I roofed and rolled the rool out over the adhesive, I went over with a 30" sod roller then my over lap was 16 "All they way thru the roof were 16 " joints there a small pitch on the roof but all in all the fiberglass under lay ment is hela strong and seals what ever you use it on !!

[DQ-suqf]

Licensed since 85…I tried the synthetic & liked them- but-a friend had “numerous” leaks with synthetic & determined that the synthetic was tearing at the nail, the synthetic didn’t hug the roof adequately & put to much pressure around the nail…I went back to Astm #30- 2 layers if the roof is a rock to composition conversation or under 4/12 pitch- always use peel & stick in valleys..If I’m going over 1x6’s some times I’ll upgrade to modified felt..

[ctanase]

what do you think about Certain Teed Diamond Deck Underlayment????

[LoveMySchedule]

I am a home inspector in Kentucky and we have a lot of metal roofs around us. Can you talk about what type of underlayment is good, better and best for that application?

[fredkorth]

Thank you, I am having a roof installed and your video definitely educated me on what to get. Keep up the good work! --- Fred

[crashie]

I've been roofing since the 70's. Still do. A roof done right with proper attic venting doesn't need any underlayment. I do put that crap on but I know it doesn't help.

[sohodt]

Have you heard of putting a peel and stick on top of asphalt paper to protect the wood from needing replaced when it's time years down the road? I've heard if you put peel and stick on the wood, you'll have to replace the wood if you need a reproof later.

[PavelessAdventure]

If I do any really steep roofs I like to use rhino synthetic underlay, it’s nice and grippy to walk on and shingles don’t slide on it as much