|Posted on Thursday, February 14, 2002 - 03:43 pm: ||
First of all, I am grateful this web site exists. Nowhere else can one find so much useful information on traditional roofing. I have learned much from the various contributions submitted thusfar.
We came across a roof recently that had damaged slates nailed to fireproof gypsum tongue & groove planks. Water has deteriorated the 3 inch thick planks significantly in several areas. Is anyone aware of a way to restore the gypsum planks to make the nailing surface sufficient without removing them. Their metal-edged interlocking design makes it difficult to remove and replace small sections of sheathing, which is easily and routinely done with wood.
Just an idea......Is gypsum available in a puddy form that can be spackled on the deteriorated areas to provide an adequate nailing surface(after it has dried, sanded, strengthed, etc...)?
Any experience anyone has with repairng fireproof gypsum plank sheathing would be much appreciated. We want to fix it correctly to last another hundred years.
|Posted on Monday, February 21, 2005 - 02:21 pm: ||
I have some what the same situation on a project at the U of Michigan. What type of nail would you use. I have 3" gypsum 3'by 3' with 30# felt paper 4/12, thick slate. Thanks, TIM