Carpet Tack is usually reserved for carpet, however I recently saw something unique in bird avoidance. By the way as you can see it isn’t working. It was a good try but the nails are not long enough to persuade the birds from landing. Also these are probably sparrows, not pigeons so it really needs to be bird spike. The technique of bird spikes is that they prevent the birds from landing, hence bird deterrent.
Leave it to the professionals when it comes to the outside of your home, we have been providing excellent work for almost 40 years. We have all the tools necessary to plan and carry out the work. I have experimented with many things, especially when it comes to woodpeckers. So call us and at least get an estimate before you attempt this on your own. Often times it may be less expensive and it will diffidently look better. Call 623-414-0176 or 480-831-9328 for a free estimate, save yourself the hassle.