Cyper WP would be a great choice for indoor and outdoor spider control. The active ingredient in Cyper WP is cypermethrin, which is known to be one of the top choices for spider control. Spraying Cyper WP will also help to get rid of the insects that spiders feed on and that will help to stop new spiders from moving in. Indoors, spray around all baseboards, door frames, window frames, under appliances, in closets and storage rooms and in areas where utilities enter into the structure. Outdoors you should spray around the bottom of the foundation, on the ground adjacent to the foundation, door frames, window frames and places where the utilities enter into the structure. We have included Cyper in our spider control kit, which also contains glue boards to help monitor the infestation (and help catch the spiders too).
A spiders web enables them to trap their food. If you keep them knocked down, the spider may die before it is able to rebuild. So brush them away both inside and out.
Spider Control Kit: http://www.domyownpestcontrol.com/spider-control-kit-p-1404.html
Wasp Freeze Aerosol - 17.5 oz. can is another great product that will shoot 20 ft and will kill spiders in hard to reach places: http://www.domyownpestcontrol.com/wasp-freeze-aerosol-175-oz-can-p-60.html
Also, applying dust in-between wall voids will add another layer of defense. Click on the following link for those directions: http://www.domyownpestcontrol.com/how-to-apply-dust-like-drione-or-delta-dust-a-95.html
The following article “How to Get Rid of Spiders” http://www.domyownpestcontrol.com/how-to-get-rid-of-spiders-a-272.html will has some great hints.