For a flat or nearly flat roof use double coverage although a torch down modified bitumen or epdm roof is a better solution.
Garden united roofing distance for nail.
Start at the bottom of your roof and roll the roofing all the way to the top of your roof.
If your decking is less than 3 4 inch then a 1 1 2 inch nail will suffice.
You can usually feel sheathing nails which are driven into rafters through the underlayment attach a jack by driving two 16d nails never roofing nails into a rafter.
If you are putting a layer of asphalt shingles over an existing layer of asphalt shingles on to a 3 4 inch deck or a plank deck then you should be using 1 1 2 inch nails.
Coil roofing nails wire welded for use with senco roofpro 450 445xp 455xp hitachi nv45ab2 nv45ae paslode r175 c 3175 44rcu apach rn 45e max cn445r2 grip rite grtcr175 stanley bostitch roofukit rn46 1 and most other roofing nailers.
Ideally locate a rafter below the sheathing.
For a slightly sloped roof use the concealed nail method shown.
Lay the felt over your roof and attach it with cap nails.
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Working with a helper expect to spend half a day installing flashings and roll roofing for a 700 square foot roof with modest complications.
Make sure there is a two inch space between the edge of the roll and the first nail.
How to use a roofing nailer like a pro.
Protect your eyes you ll be shooting nails after all.
Safety first we say it all the time but it bears repeating.
The base layer will need to be attached with nails to assure longevity of your roll roofing system.
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Step 4 set the first layer.
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The nails should be inserted every 6 inches across the felt.
The nails themselves should be in uniform rolls spaced six to eight inches apart from each other on either side and top to bottom.