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asphalt laminated kraft paper and staple up radiant floor heat
I am looking for advice on whether to expect to have a smell or off-gasing problem from asphalt contained in the 1930 floor underlayment due to installing a radiant floor heating system using Onix tubing. The details are as follows:
1. 1930 house with 2.25 inch white oak floors now has Onix staple-up radiant floor heating installed under first and second floors (although new boiler not yet operational);
2. just discovered that underlayment is asphalt laminated kraft paper (with some fiber reinforcement). Appears to be original with the floors, which are from 1930 as far as we know. To be clear this is NOT #15 or #30 asphalt impregnated roofing paper. Aquabar B seems most similar current product equivalent. The upshot is that there is some asphalt in the middle layer between the two kraft sheets, but not the higher amounts that are found in saturated roofing paper;
3. sub-floors are 3/4 inch boards with some variable gaps between the planks of up to 1/4 inch;
4. maximum design temp for water in the onix tubes is 120 degrees. Tube installation is 8" on center as standard (so 2 tubes per joist bay), except near some large doors / windows there are double the runs in some adjacent areas (but small square footage overall of this higher density installation);
5. house is located in New England.
We are at a cross-roads on project progress. We can not yet run test of the radiant as boiler not yet operational and we are awaiting gas service. Would hate to move forward on adding interior finishes if we ultimately have to take up the current floors to remove the asphalt paper. But if we wait, we may end up with no place to live for a while.
I would greatly appreciate hearing if anyone has experience with similar circumstances -- retrofit of staple-up radiant floor heating under solid wood floors with old asphalt laminated kraft paper. Once the heat comes on, does it smell like an old tire factory, none at all or somewhere in between?
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