Method of bonding roof tiles to roof substrate utilizing urethane foam
AssigneePolyfoam Products, Inc.
InventorsPat L. Murray, E. Richard Huber, Thomas C. Hughes
Life of this patent
Estimating the term…
Abstract
A method of bonding a roof tile to a roof substrate utilizing a two component polyurethane foam. The method includes the step of applying under low pressure a stream of a two component foamable liquid polyurethane on a roof substrate. Preferably, the foamable liquid polyurethane has a density in the range of about one and one-half to about two pounds per cubic foot and a reactivity period in the range of about one and one-half to about four minutes. Preferably, the foamable liquid polyurethane is applied at a rate of about two to about three pounds per minute. The roof tile is placed into contact with the foamable liquid polyurethane during the reactivity period of the foamable liquid polyurethane.
Claims16
A method of installing a plurality of roof tiles to a roof substrate on a pitched roof, the method comprising the steps of:
- applying a stream of a two component froth liquid polyurethane foam on the roof substrate from a hand-held foam dispensing apparatus, said stream having a length approximating the length of the roof tile and a width substantially less than the width of the roof tile, said froth liquid polyurethane foam having a density of about one to about four pounds per cubic foot and a reactivity period of about one to about six minutes;
- placing a portion of a lower surface of a first roof tile in substantial contact with the stream of froth liquid polyurethane foam during the reactivity period;
- and
- allowing said froth liquid polyurethane foam to bond the first roof tile to the roof substrate,
- wherein only a portion of the lower surface of the first roof tile is in contact with the polyurethane foam.
A method for in situ installation of a plurality of individual interlocking roof tiles to a roof substrate, the method comprising the steps of:
- directing a first stream of a plural component foamable liquid polyurethane on the roof substrate;
- placing a first roof tile in contact with said first stream of foamable liquid polyurethane during the reactivity period of the foamable liquid polyurethane;
- directing a second stream of the plural component foamable liquid polyurethane on the roof substrate at a proximate location but separated from said first stream;
- placing a second roof tile in contact with said second stream of foamable liquid polyurethane during the reactivity period of the foamable liquid polyurethane;
- and
- interlocking the second roof tile with the first roof tile.
A method for in situ installation of a plurality of rows of individual interlocking roof tiles to a roof substrate on a pitched roof, the method comprising the steps of:
- depositing a first stream of a plural component foamable liquid polyurethane on the roof substrate, said first stream being deposited in a generally straight line and having a length approximating the length of the roof tile and a width substantially less than the width of the roof tile;
- placing a lower surface of a first roof tile in contact with said first stream of foamable liquid polyurethane during the reactivity period of the foamable liquid polyurethane;
- allowing said plural component foamable liquid polyurethane to expand and adhesively bond to a roof tile lower surface portion which is substantially less than the entire roof tile lower surface area;
- depositing a second stream of the plural component foamable liquid polyurethane on the roof substrate, said second stream being deposited in a generally straight line at a location proximate to but separated from said first stream, said second stream having a length approximating the length of the roof tile and a width substantially less than the width of the roof tile;
- interlocking the second roof tile with the first roof tile;
- placing a lower surface of a second roof tile in contact with said second stream of foamable liquid polyurethane during the reactivity period of the foamable liquid polyurethane;
- and
- allowing said plural component foamable liquid polyurethane to expand and adhesively bond to a second roof tile lower surface portion which is substantially less than the entire second roof tile lower surface area.
Dependencies are inferred from the claim text.