Which Underlayments For Shallow Pitch Tile Roof? - Roofing/Siding - DIY Home Improvement | DIYChatroom


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Roofing/Siding

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 08-25-2009, 06:20 PM   #1
Newbie
 
Join Date: Apr 2009
Posts: 29
Rewards Points: 25
Default

Which underlayments for shallow pitch tile roof?


According to the TRI install guide for cold climates, my 3.5:12 roof needs two underlayments. Tiles will be installed on battens.

A peel and stick of at least 40 mils as a base layer is a given and is so budgeted.

What would would you recommend for an "over layer" to protect the peel and stick for the life of the roof? Titanium UDL? 30# felt?

What about reversing the layers....felt then peel and stick in order to reduce the nail penetrations?

The contractor thinks that the peel and stick is more than enough, but I'd feel more comfortable knowing that the deck was overdone.

Thanks.

Advertisement

meltdowndave is offline   Reply With Quote
Old 08-25-2009, 07:14 PM   #2
Residential Roofer
 
Slyfox's Avatar
 
Join Date: Jun 2008
Location: Struthers, Ohio
Posts: 803
Rewards Points: 500
Default

Which underlayments for shallow pitch tile roof?


Peel & stick first for sure so it can seal to the deck.
I don't see a need for the second underlayment either, especially if you use something of high quality like Grace Ice & Water Shield 'peel & stick'.

Advertisement

__________________
God Family Country Work Play
Facebook <> Twitter
Slyfox Exteriors Co.
Slyfox is offline   Reply With Quote
Old 08-26-2009, 12:19 AM   #3
Member
 
Join Date: Jan 2007
Posts: 2,384
Rewards Points: 1,000
Default

Which underlayments for shallow pitch tile roof?


If you live in a region like Arizona or another sun plentiful state, then the HT (High Temperature), version of Grace Ice and Water Shiled "May" be more appropriate.

But, you do not need the added layer of felt paper if the Ice and Water Shield is installed correctly without missing any critical areas.

Ed
Ed the Roofer is offline   Reply With Quote
Old 08-26-2009, 05:43 AM   #4
Newbie
 
Join Date: Apr 2009
Posts: 29
Rewards Points: 25
Default

Which underlayments for shallow pitch tile roof?


Thanks, all.

So if we go with only the Grace Ice and Water Shield, I can still reasonably expect to see a full 50 years out of my tile so long as it's properly installed and the flashing done correctly? And, of course, neighborhood kids watch their foul balls...
meltdowndave is offline   Reply With Quote
Old 08-26-2009, 07:07 AM   #5
Residential Roofer
 
Slyfox's Avatar
 
Join Date: Jun 2008
Location: Struthers, Ohio
Posts: 803
Rewards Points: 500
Default

Which underlayments for shallow pitch tile roof?


Yes you can.
You need to also remember there is no such thing as maintenance free.
Inspect your roof regularly 'pay some one' or do it yourself,
that way you will notice when debris begins to build up in the valley's, along walls and other penetrations and of course the gutters.
A good install and proper maintenance will make even the cheapest of materials last longer, thus it really adds to the life of good materials.

My statement about Grace was probably miss leading, it's not the only ice & water shield on the market that works.
__________________
God Family Country Work Play
Facebook <> Twitter
Slyfox Exteriors Co.
Slyfox is offline   Reply With Quote
Old 08-27-2009, 05:12 PM   #6
Newbie
 
Join Date: Apr 2009
Posts: 29
Rewards Points: 25
Default

Which underlayments for shallow pitch tile roof?


Thanks for the info.

We're going with a GAF product. It's a bit on the thin side at 40 mils, so we're going to top it a 30# felt for added insurance. We'll go light on the cap nails and depend on the battens to be the primary means to secure it. That should reduce the number of nails in the deck.

Were we able to swing the Grace product, one layer would have probably been enough.

Advertisement

meltdowndave is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
What pipe flashing do I use on a tile roof? JDM Roofing/Siding 3 05-13-2009 07:58 PM
Extend House Roof Over Back Deck Justahome Carpentry 1 04-03-2009 08:25 PM
Slate Tile Roof Cleaning Tampa Florida - Slate Roof Cleaning Using Lift. apple roof cleaning Roofing/Siding 1 12-31-2008 11:01 AM
How much joist can I cut to clear roof pitch jcrack_corn Building & Construction 1 06-24-2008 05:23 AM
How to tie low pitch roof into sides of house OR build up? jcrack_corn Building & Construction 9 06-22-2008 04:38 PM




Top of Page | View New Posts