The radius corner measurement should be taken directly from the corner of your spa, not the existing cover. The best way to get an accurate measurement is to use a carpenter’s square. If you don’t have one, that’s OK. Two rulers will work as well. Align p-force both edges to the corner of your spa. The point where the curve begins back to the inside corner of the square will be your radius measurement. See diagram above.

If you need further assistance you may want to try using our Radius Corner Measurement Sheet. The smaller the radius the more square the corner is. If you are unsure of the measurement, always go with the smaller one. A larger one will not fit properly on the spa and will not do its job.

The radius corner measurement should be taken directly from the corner of your spa, not the existing cover. The best way to get an accurate measurement is to use a carpenter’s square. If you don’t have one, that’s OK. Two rulers will work as well. Align both edges to the corner of your spa. The point where the curve begins back to the inside corner of the square will be your radius measurement. See diagram above.

If you need further assistance you may want to try using our Radius Corner Measurement Sheet. The smaller the radius the more square the corner is. If you are unsure of the measurement, always go with the smaller one. A larger one will not fit properly on the spa and will not do its job.