When 20 to 30 of the slates on a roof need replacement it is usually more prudent to replace the entire roof than to perform expensive annual repairs.
Slate roof repair vs replacement.
Replacement for different roofing material options.
Replacement on the other hand needs to take place at some point in the life of all slate roofs particularly those on older historical houses.
Neither replacing a slate roof and reusing old flashings nor replacing flashings in a deteriorating slate roof is advisable.
Even so like any material slate can become damaged and need to be repairedor replaced.
The rule of thumb among slaters is to push for replacement once 20 30 of the slate has deteriorated beyond reasonable repair.
So many times when homeowners have a slate roof on their home they have questions like is a roof leak an emergency with slate roofing and is a roof repair covered by insurance.
Slate is one of the most durable roofing materials used.
Broken or missing slates are easy enough to spot.
Relatively little maintenance and repairs are needed to help it last for decades.
A square is a standard 10 x 10 unit used by roofers.
If your slate roof is nearing the end of its life you may be considering a replacement.
Of course replacing a slate roof with a new slate roof would be ideal but it can be an expensive proposition.
When replacement is necessary even a slate roof that has been meticulously maintained will need to be replaced during someone sownership.
When properly maintained it can last well over a hundred and fifty years before needing replacement.
Again some roofing material choices are better candidates for repair than others.
Replacing a slate roof.
With slate and tile replacement is almost never the best choice.
Slate roof repair vs replacement slate roofing is the strongest longest lasting roof material on the market today.
This is especially true of older roofs nearing the end of their serviceable lives because even the most experienced slater will likely damage additional slates while attempting repairs.
Valleys chimneys and dormer sides are flashed in metal in homeland painted terne metal or copper and in the course of the slate roof s life time the flashings may be replaced two or more times.