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For the roofing experts - I bought a mobile home on the main ranch where I hunt and work sometimes in South Texas.
Currently it has asphalt shingles. They are patchy in spots where wind blew some off, but there are no big bare spots. High winds, 50 - 60+ mph are common every year.
It is on the west side of South Texas, about 100 miles from the coast. Temperatures are 105 - 110+ in August and September.
With those factors, can gavalume sheets be screwed into the existing shingle layer or do the shingles need to be removed and/or put down furring strips?
This is a camp house, not my residence. So trying to keep a lid on repair costs, but not have the roof leak or blow off.
Thanks guys.
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Joined: Sep 2012
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Campfire Ranger
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Campfire Ranger
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I'd remove the shingles......if you're going to the trouble to do it you might as well do it right.
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Joined: Nov 2011
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Campfire Tracker
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Campfire Tracker
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I'd remove the shingles......if you're going to the trouble to do it you might as well do it right. Weight would also be a concern. I would remove the shingles.
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Joined: Mar 2008
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Campfire Ranger
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Campfire Ranger
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I'd remove the shingles......if you're going to the trouble to do it you might as well do it right. This.
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Joined: Jul 2005
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Campfire Tracker
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Campfire Tracker
Joined: Jul 2005
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Put 1x4's up every 2 feet horizontal and fasten to them over the shingles
...That gap lets heat escape...
Last edited by sgt217; 08/11/19.
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Joined: Mar 2009
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Campfire Ranger
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Campfire Ranger
Joined: Mar 2009
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It’ll be fine over a layer of shingles.
~Molɔ̀ːn Labé Skýla~
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Joined: May 2016
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Campfire Kahuna
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Campfire Kahuna
Joined: May 2016
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Some places wont insure a roof unless the old asphalt shingles are removed.
I am MAGA.
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Joined: Sep 2012
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Campfire Ranger
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Campfire Ranger
Joined: Sep 2012
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If it was a good idea they'd build houses like that to start with.
Removing the shingles isn't that hard.....the clean up's the worst part.
Do it right and forget about it.
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Joined: Oct 2010
Posts: 7,688
Campfire Outfitter
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Campfire Outfitter
Joined: Oct 2010
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All good metal roofs will have a waterproofing layer under them....either asphalt based or some woven textile with an adhesive.
If it will support the weight, and the shingles are still waterproof (apart from the area where they are missing), leave them. As above, stand the metal panels off from the shingles for ventilation.
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Joined: Dec 2010
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Campfire Ranger
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Campfire Ranger
Joined: Dec 2010
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Put 1x4's up every 2 feet horizontal and fasten to them over the shingles
...That gap lets heat escape... Yep. Did it this way as a matter of course back when I worked for a roofing company except we generally used firring strips rather than 1x4's. All of this assuming there is only one layer of shingles on the roof. If more then they should be taken off.
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Campfire Regular
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Campfire Regular
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Some places wont insure a roof unless the old asphalt shingles are removed. ^^^^^ I know of contractors that will not warranty the work or the material's if they are installed over any other roofing material.
If you hunt with your kids. You should not have to hunt for your kids.
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Joined: Mar 2009
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Campfire Ranger
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Campfire Ranger
Joined: Mar 2009
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Some places wont insure a roof unless the old asphalt shingles are removed. ^^^^^ I know of contractors that will not warranty the work or the material's if they are installed over any other roofing material. Why?
~Molɔ̀ːn Labé Skýla~
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Campfire Kahuna
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Campfire Kahuna
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It’ll be fine over a layer of shingles. ^^^This^^^
"Allways speak the truth and you will never have to remember what you said before..." Sam Houston
Texans, "We say Grace, We Say Mam, If You Don't Like it, We Don't Give a Damn!"
~Molɔ̀ːn Labé Skýla~
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Campfire Ranger
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Campfire Ranger
Joined: Aug 2010
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As said already, At the very least screw or nail (screw more better) some purlins every 2 feet and attach the metal to the wood purlins. Removing the old shingles is the best.
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Joined: Dec 2002
Posts: 25,890
Campfire Ranger
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Campfire Ranger
Joined: Dec 2002
Posts: 25,890 |
For the roofing experts - I bought a mobile home on the main ranch where I hunt and work sometimes in South Texas.
Currently it has asphalt shingles. They are patchy in spots where wind blew some off, but there are no big bare spots. High winds, 50 - 60+ mph are common every year.
It is on the west side of South Texas, about 100 miles from the coast. Temperatures are 105 - 110+ in August and September.
With those factors, can gavalume sheets be screwed into the existing shingle layer or do the shingles need to be removed and/or put down furring strips?
This is a camp house, not my residence. So trying to keep a lid on repair costs, but not have the roof leak or blow off.
Thanks guys. I placed a white steel roof over asphalt shingle with 1" firring strips between on our 1400 sq ft home. I would not change that as the A/C unit works far less now with that extra bit of insulation. I can see no downside to this type of roofing job. It is very commonly seen around here.
People who choose to brew up their own storms bitch loudest about the rain.
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Joined: Aug 2009
Posts: 3,026
Campfire Tracker
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Campfire Tracker
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Some places wont insure a roof unless the old asphalt shingles are removed. ^^^^^ I know of contractors that will not warranty the work or the material's if they are installed over any other roofing material. Why? so they can get out the warranty......and make the money in the tear off...…..bob
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Joined: Apr 2017
Posts: 19,632
Campfire Ranger
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Campfire Ranger
Joined: Apr 2017
Posts: 19,632 |
Some places wont insure a roof unless the old asphalt shingles are removed. ^^^^^ I know of contractors that will not warranty the work or the material's if they are installed over any other roofing material. Why? Your work is subject to the quality of previous work and materials. Stripping to decking allows you to examine and address any structural deficiencies.
"Maybe we're all happy."
"Go to the sporting goods store. From the files, obtain form 4473. These will contain descriptions of weapons and lists of private ownership."
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Joined: Mar 2009
Posts: 18,125
Campfire Ranger
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Campfire Ranger
Joined: Mar 2009
Posts: 18,125 |
Some places wont insure a roof unless the old asphalt shingles are removed. ^^^^^ I know of contractors that will not warranty the work or the material's if they are installed over any other roofing material. Why? so they can get out the warranty......and make the money in the tear off...…..bob Exactly why.
~Molɔ̀ːn Labé Skýla~
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Joined: Dec 2002
Posts: 25,890
Campfire Ranger
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Campfire Ranger
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Posts: 25,890 |
Some places wont insure a roof unless the old asphalt shingles are removed. ^^^^^ I know of contractors that will not warranty the work or the material's if they are installed over any other roofing material. Because they can rape the home owner for the additional cost of stripping the old shingles. Note, do not lay steel directly upon the aggregate surface of asphalt shingles, as the aggregate will scrape through the paint and zinc which will allow the steel to rust.
People who choose to brew up their own storms bitch loudest about the rain.
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Joined: May 2016
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Campfire Kahuna
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Campfire Kahuna
Joined: May 2016
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Rape the home owner??
If the asphalt shingles are so good why are they being covered up with tin??
Money burning a hole?
I am MAGA.
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