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Question DetailsAsked on 8/31/2017

what size tarp should I buy to cover the third end on 16 foot wide mobile home damaged in hurricane until roof can

the roof needs to be covered tp prevent more rain damage.

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1 Answer


Well - bare minimum for width would be the 16' top width plus about 2 feet overlap each side, plus height of any torn off siding on the trailer - you want it to overlap the damaged are by at least 2 feet and preferably 3 feet all around. Length minimum 2-3 feet overlap onto the roof past the damaged area, the length of the damaged area, plus minimum 2 feet overlap down the end past the damaged area. So - say 16 wide with say 20 lineal feet of length damaged - I would get minimum 16+2+2=20' width minimum, by 20 + 3 feet overlap onto good roof + 2 feet end overhang = 25' - so about a 20x25' tarp minimum in that case. Last thing you want if avoidable is a seam on the roof, though if you have no choice you can double fold the two edges together (roll/fold over twice) then hold that seam down with a nailed-down 2x4 along the seam. A very tight rope will work sometimes but normally the fold will blow out from underneath in a strong wind - though if you double-roll the seam with a rope INSIDE the folds and another over the outside that can work well.
Better protection, especially if for longish time - I would say cover the top width and the full sides plus about a foot or two on each side to either nail it on under a 2x4 (more likely to hold in high winds) or to tie it down under the trailer (from side to side underneath) - that will make it a lot more likely to survive high winds than if it only comes part way down the side. Length minimum the damaged top length plus 3 feet, plus the full end, plus 2 feet overlap/underlap. Reason I recommend taking the tarp all the way to the bottom of the sides and damaged end is to reduce the chance of high winds ripping the tarp from it flapping in the wind - draping full height and nailing at the bottom with batten boards, or wrapping in under edge of trailer and tying across underneath will hold it tight and keep the air from getting in under the tearing it loose better. Large tarps at Walmart or such are not real expensive, so I would go the bigger option if possible, and double it up if feasible. And try to get the heavy-duty type with diagonal fiber reinforcing, not cheapest ones which are unreinforced plastic sheeting. Also - it the trailer has sharp points or sharp edges pad those with scrap clothing or cut up blanket or such to prevent tear-through. Also, at the overlap onto the good roof portion, unless the trailer tilts that way so water on the roof will drain away from the damaged portion (if sort trailer not on permanent foundation with adjustable tongue height you might be able to raise or lower tongue a bit to encourage that), but if roof tilts towards damage or is level, you will need to do something to prevent the water from blowing or running in under the tarp. With perfectly flat roof, thick caulk layer (or even cohesive clayey soil in a pinch) under tarp, then nail down 2x4 over top of tarp into roof right over the caulk line will do that. If roof is wavy or curved or such, about best you can do it lay down fabric roll (rolled up blanket strips or such to make a berm a few inches high under the edge of the tarp, then tie down rope TIGHT over the top of the tarp over that berm to act as a barrier to water blowing/running in under. Will drip a bit but stop most of the inflow. BTW - ropes - softer flexible rope (synthetic, not natural materials so it does not stretch out so redily) will wear less on the tarp, but nylon or such certainly better than nothing. Of course rope has to fit through the eyelets in the tarp but if possible 3/8" is better than 1/4" (though you may be able to double-up on 1/4" if necessary) - 1/4" will tend to fray and break every week or so in windy conditions, though of course it can be knotted - but risks water getting in while tarp is flapping loose. Good luck

Answered 3 years ago by LCD

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