Renovating older brick homes can be affordable and effective by bagging, which involves applying a thin mortar layer to soften the brick’s texture. This method not only gives bricks a fresh look but also prepares the surface for painting. After thoroughly cleaning the bricks, mixing mortar to a thick paste, you apply it with a trowel and wipe with damp sponges for an even finish. Once dried and cleaned with a broom, breathable masonry primer and paint are applied to avoid trapping moisture that could damage the wall. Though it requires effort and care, bagging followed by painting dramatically transforms exterior brick walls.
Table of Contents
- What Is Bagging Exterior Brick
- Tools and Materials You Will Need
- How to Clean Brick Before Bagging
- Mixing the Mortar for Bagging
- Preparing Your Work Area Safely
- Applying Mortar to the Brick Surface
- Smoothing and Texturing the Bagged Brick
- Letting the Mortar Dry and Cleaning Up
- Choosing the Right Primer and Paint
- Tips for Estimating Mortar Quantity and Costs
- Safety and Practical Advice for Large Projects
- Frequently Asked Questions
What Is Bagging Exterior Brick
Bagging is a technique where a thin layer of mortar, usually less than 5 mm thick, is applied over exterior brick to soften and unify its look. Instead of covering the bricks completely, this method involves pressing the mortar mix into the brick joints and then wiping the surface to create a textured finish. This not only hides imperfections and weathering on older bricks but also gives the wall a more uniform, muted appearance with either a slightly rough or smooth texture. Unlike rendering, which uses a thicker, full coat, bagging preserves the shape and character of the bricks while updating the facade. It’s popular for DIYers wanting to refresh older brick homes without major repointing or structural work. After the mortar dries, the bagged bricks can be painted using breathable masonry paints to enhance the aesthetic without trapping moisture. While bagging is accessible as a DIY project, it does require some skill in mixing and applying mortar properly to achieve the desired look and durability.
Tools and Materials You Will Need
To start bagging and painting your exterior brick, gather the right tools and materials to make the job smoother and more efficient. You’ll need a mortar mix designed specifically for exterior masonry; the amount depends on your wall’s size and the depth of the mortar joints, typically one bag covers about 3.15 square metres for large joints. Two large buckets, around 20 litres each, are essential: one for mixing the mortar and the other for rinsing your tools and sponges. A power drill fitted with a strong mixing paddle is necessary to handle the thick consistency of the mortar, ensuring it’s well blended without lumps. Applying the mortar requires a notched trowel, which helps push the mortar firmly into the brick surface and joints. Keep at least two to three large sponges handy for wiping and smoothing the mortar while it’s still wet; frequent rinsing with clean water will prevent mortar buildup on the sponges. Having a reliable water source is key, both for mixing mortar and cleaning your tools throughout the project. For safety and ease, use a stable ladder or scaffolding to reach higher sections of your wall. Protect nearby plants, windows, and pavements with drop sheets or plastic tarps to avoid unwanted splashes or drips. After the mortar dries, a stiff broom will come in handy to brush away any loose particles before painting. Finally, select a breathable brick or masonry primer and exterior paint to finish the job, this type allows moisture to escape, preventing damage from trapped dampness. Being well-prepared with these tools and materials sets the foundation for a successful bagging and painting project.
- Mortar mix suitable for exterior masonry, quantity based on wall area and joint size
- Two large buckets (around 20 liters) for mixing and rinsing tools
- Power drill with a mixing paddle capable of handling thick mortar consistency
- Notched trowel to apply and work mortar into brick surfaces and joints
- Large sponges (at least 2-3) for wiping and smoothing mortar before it dries
- Clean water source for mixing mortar and rinsing sponges
- Stable ladder or scaffolding for safe access to higher wall sections
- Drop sheets or plastic tarps to protect surrounding plants, windows, or pavements
- Stiff broom to brush off loose dried mortar particles after drying
- Brick or masonry primer and breathable exterior paint for finishing
How to Clean Brick Before Bagging
Start by using a pressure washer to remove dirt, dust, moss, and any loose debris from the brick surface. Be careful not to soak the brick too much; the goal is to get it clean without saturating it completely. Let the wall dry until it’s not dripping but still slightly damp if needed. If a pressure washer isn’t available, a stiff brush with water works well to scrub off grime. Before proceeding, inspect the bricks for any loose mortar or crumbling pieces and remove these to ensure a solid base. Also clear away any vegetation growing near the brick, as plants can contaminate mortar and cause adhesion issues. After washing, rinse the wall thoroughly with a garden hose to remove any cleaning agents used, avoiding harsh chemicals that might damage the brick or interfere with mortar bonding. Check the wall for oil stains or other contaminants that may require specialized cleaning. Make sure to cover nearby windows, doors, and other surfaces to protect them from water spray or cleaning products. If the weather is cold or humid, allow the brick to dry fully before starting the bagging process to ensure the mortar adheres properly and cures well.
Mixing the Mortar for Bagging
Start by carefully following the mortar mix manufacturer’s water-to-mortar ratio instructions to get the best results. Use a large clean bucket and a power drill fitted with a mixing paddle to combine the mortar and water evenly. Add water slowly and mix thoroughly to achieve a thick paste that spreads well but doesn’t drip or run off your trowel. Avoid making the mix too thin, as this reduces adhesion and the textured effect you’re aiming for. Make sure to eliminate lumps by mixing until the mortar feels smooth and consistent throughout. Only prepare as much mortar as you can apply within 30 to 45 minutes, since the mix will start to set and lose workability if left too long. If you’re working in humid conditions, consider making the mix slightly drier to help it set correctly. Use clean water to avoid any contaminants that might weaken the mortar. If the mortar sits for a few minutes before use, stir it occasionally to maintain an even texture. Discard any mortar that begins to harden before application to ensure a strong, lasting bagged finish.
Preparing Your Work Area Safely
Before starting the bagging and painting process, setting up your work area with safety in mind is essential. Lay down drop sheets or plastic tarps beneath the brick wall to catch any mortar drips and protect surfaces like patios, pathways, or garden beds. If you have plants nearby, cover them with plastic sheeting to prevent damage from mortar splashes. For higher sections of your wall, use sturdy scaffolding or secure ladders to ensure safe and comfortable access. Make sure these are stable and placed on even ground to avoid accidents. Wearing gloves is important since mortar contains alkaline substances that can irritate or harm your skin during mixing and application. Safety goggles should be worn to protect your eyes from unexpected mortar splashes, especially when mixing the mortar or applying it to the wall. Keep the area clear of tools, buckets, or debris that could cause trips or falls. Plan your work in manageable sections to avoid overreaching or stretching, which can be unsafe when working on ladders. Have clean water and sponges nearby so you can quickly wipe up any accidental spills or splashes before they dry and become difficult to remove. Also, check all your tools beforehand to ensure they are in good working condition and easy to reach. If you are working under direct sun or hot weather, take regular breaks and stay hydrated to prevent fatigue or heat-related issues. These steps will help you work efficiently while keeping safety a priority throughout your project.
Applying Mortar to the Brick Surface
When applying mortar to your brick surface, it’s best to work in manageable sections about 2 to 3 meters wide and the height of one story. This approach helps maintain control and ensures the mortar stays workable. Start at the bottom of the wall and work your way up, using a notched trowel to scoop mortar and press it firmly into the brick joints and surface. Swiping the mortar in multiple directions helps fill all gaps and prevents air pockets, which can weaken the finish. Avoid mixing the mortar too runny, as it will drip and fail to hold the desired texture. Keep an eye on the thickness: it should be thin enough to allow the brick shapes to remain visible, preserving the character of the wall. If you notice the mortar setting too quickly, try mixing smaller batches or lightly dampen the wall before application to slow the drying. Always have a damp sponge ready to immediately wipe off any excess drips or splashes to keep the surface clean. Maintaining a steady pace is important so you can apply and smooth the mortar before it begins to harden. Also, regularly stop to clean your tools; hardened mortar buildup will reduce their effectiveness and make the job harder. By following these steps, you’ll achieve a consistent, textured bagged surface that enhances the brick without covering its natural appeal.
Smoothing and Texturing the Bagged Brick
Once the mortar is applied, smoothing and texturing the bagged brick is key to achieving the desired finish. Use a damp sponge, not soaking wet, to gently wipe the mortar surface in circular or sweeping motions. Rinse the sponge often to prevent mortar buildup from spreading back onto the wall. The amount of pressure and speed you use while wiping controls how much mortar stays on the surface: more wiping results in a smoother finish, while less wiping leaves a rougher, more textured look. Timing is important because the mortar stiffens quickly, making it harder to smooth evenly, so it helps to work efficiently. Ideally, have one person applying mortar and another wiping to keep the process flowing smoothly. Keep your sponge clean and replace it if it gets clogged, and avoid soaking the wall during wiping as too much water can weaken the mortar layer. Check carefully for any thin or missed spots and fill them before the mortar sets. If you’re new to this, practicing on a small test patch first can help you get a feel for the wiping technique and decide what texture you prefer.
Letting the Mortar Dry and Cleaning Up
Once you’ve finished bagging the brick, it’s important to let the mortar dry naturally. Keep in mind that drying times can vary quite a bit depending on the weather and how thickly the mortar was applied. During the first 24 to 48 hours, the wall may look uneven or blotchy as the mortar cures, which is completely normal. Resist the urge to touch or disturb the surface during this time, as it can damage the finish and affect the final look.
After the mortar has fully dried, take a stiff broom and gently sweep the wall to remove any loose mortar dust or fine particles that might remain on the surface. This step helps prepare the wall for painting and keeps it looking clean. When it comes to your tools, clean them immediately after use with water before the mortar hardens; this makes maintenance much easier and prevents damage to your equipment.
Be careful when removing drop sheets or tarps; doing this too quickly or roughly can scatter dried mortar debris around the work area. If you have any leftover mortar mix that’s still usable, store it properly for future touch-ups. Otherwise, dispose of any hardened material responsibly to avoid creating waste.
Before you start painting, inspect the dried wall closely for any cracks or thin spots you might have missed. These should be patched to ensure an even, durable finish. Remember, don’t rush into painting until the mortar is completely dry, as painting too soon can lead to adhesion problems and peeling later on. Finally, keep your worksite tidy and free from hazards to maintain a safe and efficient environment as you wrap up this stage of your brick makeover.
Choosing the Right Primer and Paint
When selecting primer and paint for exterior brick, it’s important to choose products made specifically for masonry surfaces. Brick needs breathable primers and paints that let moisture vapor escape, preventing dampness from getting trapped inside the wall. Avoid oil-based or non-breathable paints, as these can seal the brick and cause moisture damage over time. Opt for exterior-grade primers and paints that can handle weather exposure and resist UV fading. If your bricks are dark and you want to lighten them, go for lighter paint colors to reduce the number of coats needed. Before painting the entire surface, test the primer and paint on a small, inconspicuous area to check how well it sticks and looks. Always follow the manufacturer’s instructions on drying times and how many coats to apply. Start by applying a primer to improve paint adhesion and durability, especially over the mortar joints. Use brushes, rollers, or sprayers designed for textured surfaces to get an even finish. Plan your painting for a dry day with moderate temperatures to help the paint cure properly and achieve a quality finish.
Tips for Estimating Mortar Quantity and Costs
When estimating how much mortar you’ll need for bagging exterior brick, start by measuring the total wall area, then subtract the space taken up by windows, doors, and other openings. The size of the mortar joints also matters, a larger joint requires more mortar, so keep that in mind. Typically, one 20 kg bag of mortar mix covers about 3.15 square meters when working on larger joints. For an average-sized house, you might expect to use around 30 bags, which would cost roughly $267 AUD. It’s a good idea to buy mortar in bulk if possible, as this can lower the cost per bag compared to purchasing smaller amounts. Always add a bit extra mortar to your estimate to cover waste and any trial runs you might do to get the technique right. Don’t forget to factor in other expenses like primer, paint, scaffolding rental, and tools if you don’t already own them. Bagging can be time-consuming, so if you plan to hire help, labour costs should also be included. Weather can cause delays, extending the project timeline and possibly increasing costs, so keep that in mind when budgeting. During the application, keep track of how much mortar you actually use; this will help you make more accurate estimates on future projects.
| Wall Area (m²) | Mortar Bags Used | Cost (per bag approx $8.90 AUD) | Notes |
|---|---|---|---|
| 17.35 | 5.5 | $49 | Large mortar joints, end wall |
| 1 bag | ~3.15 m² coverage | $8.90 | Varies by joint size & texture |
| Whole house | 30 bags | $267 | Large home, extensive coverage |
Safety and Practical Advice for Large Projects
When working on large bagging and painting projects, safety should always come first. Always wear protective gloves when mixing and applying mortar to avoid skin irritation, and use safety goggles to shield your eyes from mortar splashes and dust, especially during cleaning. A dust mask is also important when mixing mortar or pressure washing to reduce inhalation of dust and particles. If you need to work at heights, make sure your scaffolding or ladder is stable and securely positioned before climbing. Avoid overreaching by moving the ladder frequently to maintain balance, and never try to stretch beyond your comfort zone. Keep your work area tidy by removing buckets, tools, and drop sheets that could cause trips or falls. Avoid working in wet or windy weather, as this increases the risk of slipping and can make mortar application difficult to control. Electrical tools like power drills should always be plugged into properly grounded outlets and kept away from water. It’s a good idea to have a first aid kit nearby for minor injuries or accidental skin contact with mortar. Whenever possible, work with a partner who can help with heavy materials and provide an extra set of eyes for safety when working at heights.
Frequently Asked Questions
1. Why is it important to properly bag surfaces before painting exterior brick?
Bagging surfaces helps protect windows, doors, and other areas from paint splatters or overspray, keeping the job clean and professional-looking. It also saves time on cleanup later.
2. How do I prepare exterior brick for painting to ensure the paint sticks well?
You need to clean the brick thoroughly to remove dirt, mildew, and loose mortar. Scrubbing with a stiff brush and using a mild detergent, followed by rinsing and letting it dry fully, creates a solid surface for the paint to adhere.
3. What type of paint is best suited for painting exterior brick, and why?
A high-quality masonry or elastomeric paint works best because it’s designed to handle the porous nature of brick. These paints provide breathability to prevent moisture buildup, which can cause peeling or damage over time.
4. Can I paint exterior brick myself, and what tools will I need for a smooth finish?
Yes, painting brick is a doable DIY project with the right tools: a scraper for prep, a roller with a thick nap for applying paint evenly, brushes for edges, and plastic sheeting or tape to protect nearby surfaces. Patience and proper technique make a big difference.
5. How long should I wait between painting coats on exterior brick to avoid peeling and ensure durability?
It’s best to allow at least 4 to 6 hours between coats, depending on weather conditions, to let the paint dry properly. Rushing the process can trap moisture or cause uneven adhesion, leading to peeling or a rough finish later on.
TL;DR Bagging exterior brick is a budget-friendly DIY method to update old brick walls by applying a thin mortar layer that softens the look. The process involves cleaning the brick, mixing and applying a mortar paste, then smoothing it with sponges. After drying, brush off loose mortar and finish with a breathable masonry primer and paint to protect and refresh the surface. Proper tools, safety measures, and estimating mortar needs help manage costs and effort, especially on larger projects. This technique can dramatically improve your home’s exterior with some preparation and patience.
