Every home is unique, which is why J K Home Improvement Siding & Windows offers you many options for siding. A popular option is the seamless insulated siding, which eliminates expansion and contraction problems due to improper nailing or attachment. The ferrule studs on them are exactly four inches apart, which means there is no worry about improper nail spacing or angling. The ferrule studs also prevent the nails from being installed upwards or downwards, which provides perfect nailing.