3 Problems With Synthetic Roof Underlayment

Synthetic underlayment is far superior to felt underlayment, but there are some minor problems with synthetic roof underlayment that you should be aware of. By the end of this video you'll know if synthetic underlayment is right for your roof.

00:00 Problems with synthetic roof underlayment
00:38 Is synthetic roof underlayment better than felt
00:53 Synthetic roof underlayment price
01:45 Synthetic underlayment weight versus mil thickness
04:27 Building codes for synthetic underlayment

3 Problems With Synthetic Roof Underlayment
1. Cost
2. Mil Thickness Vs Weight
3. Building Codes

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Sharkskin Synthetic Roofing Underlayment

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Most roofs use a synthetic roof underlayment because it's a better product, but there are some problems with synthetic underlayment that you should be aware of. If you had a list of pros and cons for synthetic underlayment vs felt it would be lopsided in favor of the synthetic underlayment.

The main problem with synthetic underlayment for roofs is the cost. The price of synthetic underlayment is considerably more expensive than felt underlayment in the short term. However, in the long term using a synthetic underlayment for metal roofs will save you money versus felt.

We recommend Sharkskin roofing underlayment and they make three types of roofing underlayment
Sharkskin Ultra SA
Sharkskin Ultra
Sharkskin Comp

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[thulsa]

Here in blistering AZ synthetic felt is not holding up compared to tar paper.

[VANESSASVANLIFEJOURNEY]

Thanks for explaining this very helpful

[kermitefrog]

I have used 30lb. tar paper and it has performed great. In our area synthetics have run 3 times the cost of 30lb. tar paper.

[Austinroofingcontractors]

Finally, someone who really knows and is not afraid to tell it like it is. Synthetic underlayment is not waterproof if you use it.

[CrustyAbsconder]

Wouldn't it be best in the long run if the metal panel had a coating on its underside ?

[johnnyweld]

all white metal roof is the best for Florida for sure Thank you last very long too

[Mickey_Bauer]

What's a good underlayment for the hot and dry Arizona concrete tile roof 4:12 pitch that requires a double layer and no ice & water shield, 115 wind?

All the contractors here are recommending G-40 or TU-43 SBS modified underlayment for tile roofs. Some of them say synthetics are great for the colder climate shingle roof but they would never install it on a tile roof in AZ.

[mannyg]

As a home owner in central valley California where do you purchase 10 rolls of sharkskin ultra and ultra SA?

[everythingmatters]

What is the reason a building code would not allow synthetic underlayment?

[dagnabit]

Using a machine caliper for checking thicknesses is absurd and the roof is supposed to keep your roof dry not your underlayment secondly lack of permeability on these Is hard on the decking there been numerous problems with synthetic underlayment nails weeping and degradation of roof decking especially if every roof bay is not vented I would use 30 lb certified roofing felt certified d226 type 2 you can also double up on it depending on your location I find they like to use this product one easy to walk on secondly if the do horse crap job of installing your roof they have the underlayment to fall back on eventually it will become a problem a delayed time before you recognize the leak decking damage not to be very truthful not sure how this may apply to metal roofing but again the certified organic felt paper will not cook your decking and or hide leaks if they occur providing knowledge of that leak far sooner hence allowing early intervention to limit damage

[kkp]

synthetic is now just 10 cents or less per sf.
30lb Felt is more expensive