How to Install a Mounting Block on Existing Vinyl Siding? (Step-by-Step Tutorial) (2022)

Are you looking for a way to add exterior accessories such as lamps, doorbells, and water faucets without damaging your siding? A mounting block is the answer—it is solid, low-key, and available in styles and colors that match vinyl siding panels. It lends interest and can last for the life of your house. The best part is that you can set it up in a few minutes with a few basic tools.

The best way to install a mounting block on existing vinyl siding is to recess it into the siding so that it is flush with the rest of the wall. Does this sound complex? It is actually easier than it sounds. Read on—I will show you how to install a nifty mounting block without tearing out your vinyl siding.

Table of Contents

  • Tools needed for installing mounting block on existing siding
  • Step-by-Step Guide to Install a Mounting Block on Existing Vinyl Siding
  • Extended Tips
  • Summary: How To Install A Mounting Block on Existing Vinyl Siding

Tools needed for installing mounting block on existing siding

  • Mounting block set
  • Oscillating cutting tool
  • Utility knife
  • Screw gun
  • Siding tool
  • Spirit level
  • Pencil
  • Tape measure

Step-by-Step Guide to Install a Mounting Block on Existing Vinyl Siding

Follow these simple steps to set up a mounting block on vinyl siding in no time.

Step 1: Outline the mounting block on the siding

How to Install a Mounting Block on Existing Vinyl Siding? (Step-by-Step Tutorial) (1)

Although you do not need to remove your siding to complete this project, you will have to cut a portion of it to install the block.

To get started, separate the mounting block from the trim it comes with; you will install the trim later.

(Video) Tip of the Week: Using Vinyl Siding Mounting Blocks

Next, you want to mark the spot where you will install the block. Place the block on the siding with the screw flanges facing you and the face against the wall. Then, use a pencil to trace an outline of the block’s face.

Pro tip: Use the tape measure to check that the dimensions of the outline are similar to the actual block before cutting the siding.

Step 2: Cut the siding

How to Install a Mounting Block on Existing Vinyl Siding? (Step-by-Step Tutorial) (2)

Use the oscillating tool to cut the siding along the outline you had drawn earlier. An oscillating tool is quicker and will give you a cleaner cut, but a utility knife can get the job done too.

Whether you use an oscillating tool or utility knife, the goal is to be as accurate as possible while cutting the siding. The face of the mounting block should fit snugly in the cut hole.

Take your time as you can along the top, sides, and bottom of the outline. Once you are done, you will be left with a hole exposing the house wrap behind the siding.

Instead of driving nails through the vinyl and potentially ruining the siding, you fasten the mounting block onto the house wrap and underlying studs. But we will get to this later.

Once you cut the hole in the siding, place the block to check that the face fits before moving on to the next step.

(Video) How to Install Mounting Block to existing siding for new water valve.

Step 3: Slide the mounting block behind the siding

How to Install a Mounting Block on Existing Vinyl Siding? (Step-by-Step Tutorial) (3)

Instead of installing it on top of the siding, you want to install the mounting block flush with the rest of the wall for a nice, neat finish. You will therefore need to lift the side panel and slip the block underneath.

Locate the seam between the panel on which to cut a hole and the adjacent panel horizontally. Slide your fingers to break the seam and then, use the siding tool to lift and uninstall the bottom of the panel. This will give you room to slip in the mounting block.

Slide the mounting block underneath the panel and fit it squarely in the cut hole. The block’s face should face you as the screw flanges face the house wrap.

Ensure that the mounting block fits perfectly in the hole you have cut. Use a spirit level to check that the mounting block is square and level installed in the hole.

Step 4: Fasten the mounting block to the house wrap

How to Install a Mounting Block on Existing Vinyl Siding? (Step-by-Step Tutorial) (4)

Now that you have fit the mounting block in the hole in the siding, the next step is fastening it to the house wrap.

Driving screws through the respective holes on the mounting block flange can be tricky, as the screw holes are hidden behind the siding. But, a screw gun can simplify the job.

(Video) How to Install Mounting Blocks & Fixture Mounts with Vinyl Siding

Lift the siding panel, wiggle the screw gun in the open space you’ve cut through the siding, and drive a screw through one of the screw holes.

Drive a screw into each of the remaining screw holes to attach the mounting block firmly to the house wrap. Check for levelness each time you drive in a screw so you can correct any errors as you go.

Pro tip: Use galvanized screws as they are less prone to rusting. Set an appropriate depth on the screw gun to avoid driving the screws too deep into the wall studs.

Step 5: Re-install the siding

How to Install a Mounting Block on Existing Vinyl Siding? (Step-by-Step Tutorial) (5)

Once you screw the mounting block behind the siding, you can lock the panel back into the j-channel.

Hook the siding tool to the bottom folding of the panel, then pull it down slightly over the j-channel of the panel underneath.

Run your hand across the panel, applying slight pressure to snap the panel firmly into the j-channel. Check out this video for a nice visual explanation on how to fix a vinyl sliding panel that has come loose.

The mounting block should be flush with the rest of the wall if you have installed it properly.

(Video) Mounting Block for Outlet on vinyl siding

Step 6: Install the trim

How to Install a Mounting Block on Existing Vinyl Siding? (Step-by-Step Tutorial) (6)

Mounting blocks come with a removable trim that gives the block a finished look that complements the rest of the siding.

Remember, at the start of the article. I asked you to remove the trim and set it aside before working with the mounting block. Now is a good time to put that trim to good use. Mount the trim on the block, and flush against the wall to complete the look.

That’s it! You now have a solid, good-looking spot to hang exterior wall accessories without damaging or removing the vinyl siding panels. Check out these extra tips below to get the most from your project.

Extended Tips

  • Choose the right mounting block for the job; the mounting block you need for hanging a house number or wreath is different from what you need for an electrical outlet or water faucet. Blocks for electrical outlets come with a weather-safe box for added protection.
  • Consider the color of your vinyl siding when choosing a mounting block. Opt for one that closely matches the siding color for a low-key, professional-looking finish.
  • Be sure to check the recommended weight your mounting block can support before purchasing and installing it. Some blocks will support heavy items like mailboxes, while others are more suited to lighter accessories such as small light fixtures.
  • Although some vinyl siding materials are hardy and feel rigid enough, it is best to avoid driving nails or screws directly into the siding. Puncturing vinyl siding can weaken the panel’s structure and shorten its lifespan. This is why I recommend installing the mounting block behind the vinyl siding.

Be careful when cutting the hole in the siding. You want to cut to precise measurements and not extend cutting past the outline as this will permanently damage the siding. Unnecessary cuts on the siding can let in water, potentially exposing your walls to water damage over time.

Summary: How To Install A Mounting Block on Existing Vinyl Siding

Accessorize your vinyl-clad walls can be tricky, especially if drilling through the vinyl panels is not an option. If you have been looking for a solution around this, mounting blocks is the way to go.

As you can see, they are incredibly easy and inexpensive to install, even for someone with basic DIY skills. Now, you can hang your wall planters, light fixtures, and other trinkets without worrying about damaging the vinyl siding panel. Just be sure to purchase the correct mounting block for the job.

FAQs

How do you mount on top of vinyl siding? ›

You might have to shim the last piece or use a double utility trim to maintain the proper angle for

How do you anchor something to vinyl siding? ›

Locate the horizontal seam where the siding pieces snap together. Lift the upper siding piece lightly and slowly insert the hook between the seam, with the hooked side facing out. Push the hook firmly until it snaps into the seam. Hang any item no more than 12 pounds or according to the manufacturer's recommendations.

How do you use a universal mount block? ›

First you nail on the base to the wall. And you bring the foam and vinyl over to it and you snap

What is a vinyl siding mounting block? ›

Mounting blocks provide a flat surface for installing outdoor light fixtures, electrical boxes, or other mountable units on vinyl siding. They also come in several different styles that provide a neat trim around a vent or hose bib.

Can you screw into vinyl siding? ›

A stainless steel screw is the very best, but also the most expensive. Vinyl coated screws are great too. In most cases you can purchase these in rather small quantities. No matter which screw you buy, make sure it is a Phillips head screw because they are the easiest to use.

What is F channel used for in vinyl siding? ›

F-Channel is a necessary accessory to complete any vinyl siding job. Used to install soffit, it provides a receiving channel to hide ends of soffit panels.

How do you install an outdoor outlet on vinyl siding? ›

How To Install an Outdoor Outlet Weatherproof While-In-Use Exterior ...

How do you find a stud behind vinyl siding? ›

Use a good quality stud finder or rap firmly on the wall and listen for a solid sound, indicating a stud is beneath. You can also check base molding or crown molding for filled nail holes, which indicate stud location. Another clue is the location of outlets and switch boxes because one side should connect to a stud.

What adheres to vinyl siding? ›

100% acrylic paint works best with vinyl siding, as it's lightweight and tightly clings to the vinyl. Paint that is too think will eventually flake off. Two coats, best applied as a spray, will do the trick. Keep in mind that darker colors will absorb the heat from the sun and bubble over time.

How much weight can you hang on vinyl siding? ›

Most vinyl siding hooks can hold up to 5 pounds. They are strong enough to hold a wreath, planter, birdhouse, or small metal and wood decorations. For hanging heavier objects such as large metal decor, invest in heavy-duty metal siding hooks, usually holding around 10-12 pounds.

How do you drill a hole in vinyl siding? ›

Use a wood bit if the substrate behind the siding is wood and a masonry bit if the substrate is brick or concrete. Mark the position of the hole, set the bit on the mark, and operate the drill at a low speed until it penetrates the siding. After that, increase the speed if you need to drill deeper into the substrate.

How do siding blocks work? ›

How To Install Vinyl Siding Accessory Mounting Blocks - YouTube

How do you put a security light on vinyl siding? ›

General Info 7: Security Light Mounting for Homes with Siding

What is J channel for vinyl siding? ›

One of the last steps before installing vinyl siding panels is trimming around all sides of windows and doors with J-channel (aka “J”). This channel hides the cut edges of the siding where it meets windows and doors, making for a clean look.

Can you use J channel as a starter strip? ›

Vinyl Siding - J channel Options - YouTube

What is a zip tool for vinyl siding? ›

How to Replace Damaged Vinyl Siding - YouTube

What is AJ Block in siding? ›

The UniBlock, universal J-Block mounting block is used to install exterior electrical outlets, water faucets, light fixtures, mailboxes, house numbers, and doorbells. Richwood mounting blocks are built to withstand the toughest weather and retain their color and beauty over the life of the home.

Do I need a mounting block for exterior lights? ›

A: Anything destined for an outside wall—light fixtures, outlet boxes, and dryer vents—should be attached to a mounting block that rests against the sheathing to keep water from getting past the fixture and underneath the siding.

What is a mounting block for in construction? ›

Mounting blocks are ideal for concealing cut ends and providing a flat, uniform surface on lap siding or stone to mount fixtures, outlets, spigots and more. Mounting blocks: Conceal unsightly cuts.

Is it OK to nail into siding? ›

To make your home more beautiful or to celebrate different holidays or seasons, you may want to hang decorations on the side of your house. This can be tricky with a vinyl-sided house because you shouldn't drill or nail through the siding. Holes can cause water to seep behind the vinyl, creating problems for your home.

How do you install a screw hook without a drill? ›

Use a Hammer and Nail

Using a hammer and nail to make pilot holes is an easy process. Pick up a nail that has a smaller diameter than the screw hook that you need to install. Additionally, make sure that the length of the nail is no more than your screw hook. This is the most important part.

How do you attach S hooks to vinyl siding? ›

Slide the top curve of the S piece of the S-hook into one of the holes along the front of the mounting bar so that the bottom curve of the piece forms a hook pointing forward away from the siding surface. Hang whatever item you need onto this forward facing hook to use the installed piece.

Should I use F or J channel? ›

Typically, builders prefer F channel for soffit, since it's designed for the purpose. Because it's crafted to suit the soffit, it doesn't take as long to install. If you choose J channel, you'll have to install twice as many pieces, both to hold up the soffit and to cover the edges.

Can you install F channel upside down? ›

The upside down F creates a shelf for the soffit to slide into and rest on. The F channel can be easily confused with the J-channel that is used to cover the ends of the vinyl at the corners of the house and around windows.

Should J channel be caulked? ›

TOM: Nah, it's not necessary. It should be watertight the way – if the installers put it in correctly, it should be watertight as it is. If they need – if it needed to be caulked, they would have done that.

How do you install outdoor plugs? ›

How to Install an Outdoor GFCI Electrical Outlet | The Home Depot

How do you install outdoor outlets on vinyl siding? ›

How To Install an Outdoor Outlet Weatherproof While-In-Use Exterior ...

How do you install Sturdimount? ›

TruExterior Nickel Gap Installation – SturdiMount Block - YouTube

How do you flash block siding? ›

How to Flash Siding Block - YouTube

Do you need a mounting block for exterior lights? ›

Installing Outdoor Light Fixtures

A: Anything destined for an outside wall—light fixtures, outlet boxes, and dryer vents—should be attached to a mounting block that rests against the sheathing to keep water from getting past the fixture and underneath the siding.

How do you install outdoor plugs? ›

How to Install an Outdoor GFCI Electrical Outlet | The Home Depot

How do you install hardiplank lights? ›

What's the best way to attach string lights to Hardie siding? - YouTube

How do you install flashing on the side of a house? ›

How to Install Drip Edge and Step Flashing | This Old House - YouTube

What is Z flashing for siding? ›

Galvanized Steel Z-Flashing is made from 28-Gauge galvanized steel. It is used to protect the horizontal joints between sheets of siding from water infiltration. The large leg of the metal goes against the wall, leaving the seat and face covering the top edge of the siding.

How do you drill a hole in vinyl siding? ›

Use a wood bit if the substrate behind the siding is wood and a masonry bit if the substrate is brick or concrete. Mark the position of the hole, set the bit on the mark, and operate the drill at a low speed until it penetrates the siding. After that, increase the speed if you need to drill deeper into the substrate.

Videos

1. Install Ring 2 doorbell on 4-inch clapboard siding - use mounting block - very easy
(Dave Mdks)
2. How To Install Vinyl Siding Accessory Mounting Blocks
(HouseImprovements)
3. How to install a mounting block on vinyl siding for Tesla wall Charger outdoors
(DIY RAY)
4. Exterior Light on Vinyl Siding
(DIYNorth)
5. Diamond Kote RigidMount Mounting Block Installation | Built on LP SmartSide
(Diamond Kote Building Products)
6. Installing Exterior Outlet in Vinyl Siding in 10 Minutes
(RDAllen)

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