If you have stucco on the outside of your home, it’s technically considered cladding and not siding, but beyond that, it’s impossible to tell without a little digging. Without damaging the siding material, expose part of it to see if there’s an air gap between the siding and your exterior wall. If there is, you have cladding. If the siding is affixed directly to the exterior wall, you have a simple siding system.

Vinyl can withstand many different cleaning methods, but there are two things you need to be wary of. First, particularly harsh chemicals will damage your vinyl siding and reduce its lifespan. Second, be careful about pressure washing your vinyl siding. Vinyl can resist powerful washing damage more than softer siding like wood, but high levels of pressure can still crack it. Use the lowest level of pressure for power washing vinyl, or hire a siding professional to do it.

For the materials alone, a square of siding costs an average of $600, but prices can range from $100 to $3,000, depending on the material. Vinyl siding costs toward the lower end of that range, while real brick or stone siding costs closer to the higher end. Keep in mind that many boxes of siding contain two squares, enough to cover 200 square feet, so you may need to double your cost if you only need one square.

You can put new siding over clapboards, but it’s not recommended. Some sidings, like vinyl siding, can go over clapboards with sheathing like a foam layer in between. However, it’s best to remove clapboard siding if you plan on replacing it with new siding. Burying wood clapboards underneath new siding can create risks of rot and mold, or hidden insect damage. It can also create warping issues over time. Removing clapboards allows you to properly install a new sheathing, as well as clean up the exterior wall and look for any signs of damage.