When re-siding, should Armstrong Temlok Sheathing be replaced?

Answered by Brendan ~ October 16, 2010 ~ Comments

In live in a 1950's ranch with Temlok Sheathing and no insulation. Should the sheathing be replaced or covered in foam and Tyvek when re-siding the house? Also can the Temlok withstand having insulation blown in behind it? I can't seem to find any information on the Temlok product other than really old ads.

Michael ~ Riverdale, Maryland

Brendan Fowler

I am not familiar with Temlok Sheathing, so it is very difficult to say how it is going to hold up. Generally, when you are talking about adding a layer of insulation over the sheathing, it makes it very difficult to re-trim and reside. All of your window, door and exterior trim details will have to be redone to provide for the thickness of the insulation. It will also require the use of extra long siding nails or backing to hang the new siding. Blowing in new insulation would be the best option, but I would consult with both insulation and building contractors to see if the sheathing is sound enough to blow insulation behind it. Good Luck!

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