Under a minute if you have the right tools and know what you're doing.
If either of those things are not true... much, much longer.
make sure the roof structure is sound and no moister damage. then it depends on what type of decking
Yes as long as there is nothing wrong with the old decking like rot or something of the sort. Make sure when you fasten it to hit the rafter with your nails or screws. I always separate the two layers of wood with tar paper also any time i lay over other wood.
Roof decking, exterior sheathing.
If you are looking for radiant barrier by the square foot just search online for radiant barrier. I install radiant barrier and it comes from www.ecofoil.com
Fire-retarder material which protect wood roof decking and wood eave in the fire hazard area. it could be paint, sheet roll should underCRC R337.4 and CRC R337.7
A roofing square is 100 square feet of materials.
In excess of 300 years IF installed properly 4 PSF sheet lead under a slate roof for example is a decent long lasting roofIn excess of 300 years IF installed properly 4 PSF sheet lead under a slate roof for example is a decent long lasting roof
A mansard roof is difficult to install due to its shape and structure. What makes a mansard roof so difficult to install is that there are 4 sides all of which have different slopes.
typically 1 1/4" nails work fine, but the nails need to penetrate the roof decking material by a minimum 1/4" so if you are overlaying an existing roof, or your decking material is thicker than one half inch, you will have to use longer nails.
To install the Asphalt Arc30 year roof depends with the materials that you will use.
You tear the old roof off with one of those shovel looking thing that have teeth on the end. Remove the old felt paper and the nails and chingles. Then inspect the decking. Replace any decking that is rotten. Then put down new felt and flashing and replace shingles. Good luck.
I have roofed many houses and yes roofed in light rain. The felt will soak up water in the decking and the heat of comp shingles will dry out the felt. It makes for a dangerous job if your on a high pitched roof. When the felt gets wet it will crinkle up and not lay flat which may not be noticed if you have a thick comp shingle (30 year+). I've tried covering the roof to protect from rain with plastic or tarps, but it always seems to be waisted work. Tarps blow off, holes in plastic from laying boards down which causes leaks. I prefer to put my work to get the job completed. I have never hear of mold in decking from roofing in wet conditions. I have removed roofs that had rotten decking due to low pitch and surrounded by trees which did not allow the roof to dry out after rains. The rotten decking was only in certain areas of the roof and only less than 10% of the decking. I wouldn't say the 10% replacement was due to roofing in wet conditions. That is my experiences, hope that helps.