They certainly appear to be!!!
Practice good sanitation for control. Vacuum and clear away all webs, being sure to remove any egg cases. Move and dust frequently behind furniture, stored boxes and appliances.
Eliminate the spiders' food sources - including flies, cockroaches and moths - and they will be less likely to return. Check and repair all screens, and seal cracks.
Remove piles of wood, trash and debris from around the foundation of your home. Be sure to wear protective clothing: long-sleeved shirts, long pants, gloves and boots.
Hose off the outside of your home to destroy webs and egg cases.
Replace outdoor lights with yellow or sodium-vapour lightbulbs, which are less likely to attract insects and then spiders.
Shake out clothing that has been stored before putting it on.
If you're determined to use a chemical control against spiders, keep in mind that these are only effective if the chemical lands directly on the spider. A flyswatter works as quickly. I did read somewhere that spiders do not like the smell of Conkers!!The story goes if you drill a hole in the conkers,then place them around the home,it repels the spider!(remember conkers are poisonous to animals) No idea if this is true,as I have never tried it!! Another tip,keep all potted plants away from the house,as spiders will go to them to get water!! THAT worked for me!!! Have not had any so far!! Fingers crossed !!!!!!!!