Repointing is a necessary maintenance process to ensure the structural reliability and robustness of your residential and commercial properties. Repointing entails the removal of old mortar and the installation of new mortar for added reinforcement and architectural beauty. With time, the mortar adhesion diminishes because of the temperature variations and moisture penetrations, which leads to repointing, but most homeowners choose repointing over old mortar, which is not beneficial in the long run, and it is not recommended by professional masons. To restore the masonry, it’s critical to identify the spots that need repointing. So, in this blog, we’ll explore the drawbacks and the results of repointing over old mortar.
Reasons for Attempting Repointing Without Proper Mortar Removal
Here is the list of reasons that make the homeowners think that repointing over the old mortar is better than going through the whole process.
- Rapid results: As removing the old mortar takes a lot of time, to hasten the process execution, homeowners opt for repointing over the old mortar.
- Budget-conscious: it requires a minimal workforce, which means a smaller budget is needed in the repointing process.
- Cosmetic-only repairs: homeowners have had this misconception that only minor repairs can fix the underlying problems for the longest time.
Drawbacks of Improper Repointing
Let’s have a look at some of the drawbacks of repointing over the old mortar, which leads to early structural damage and costly repairs.
1. Reduced structural grip
When the new mortar gets placed on top of the old mortar, the damaged mortar lacks the sticking ability, and it will not form a strong bond. It weakens the mortar bonding and results in early mortar failure and building collapse.
2. Sealed-in Dampness
Applying the mortar over the old one can lead to moisture issues as the gaps cannot be adequately sealed. So, it can cause freeze-thaw cycles, water penetrations, and efflorescence on the walls.
If you’re noticing water stains or interior dampness, it’s likely due to failing joints—read how to identify signs of deteriorating mortar joints.
3. Inconsistent Appearance
The upper new layer of mortar without the removal of the old one can give you an unpleasant look and doesn’t blend with the original shape and authenticity of the original structure.
4. Reduced Durability
Improper repointing can cut the lifespan of your masonry and start flaking, even though repointing with proper techniques and industry-approved materials can last for 20+ years. Proper repointing can last 20–30 years.
5. Investment with poor return
Repointing this way looks budget-friendly at first, but it can harm your masonry in the long run. Repointing over the old mortar can lead to early deterioration, which makes you pay thousands for the repairs.
Best practices for successful repointing
By following these techniques, you can have the successful repointing of your residential and commercial properties:
- Apply appropriate mortar: use suitable mortar for every building type, like lime-based mortar for historic buildings and cement-based mortar for modern buildings.
- Use perfect mortar blends: make sure to use perfect colors and textures to match the authenticity of the work.
- Avoid over-applying mortar: use an adequate amount of mortar to avoid misshapenness or misalignment.
- Repoint in stable weather: choose the season and weather conditions wisely and avoid repointing in harsh cold weather, like in the Bronx.
Consequences of Repointing Over Old Mortar
Here are some of the results of improper repointing, but it’s better to remove the old mortar than to repoint it.
- Hairline cracks in the mortar
- Early surface deterioration
- Water seepage
- The mortar crumbles easily when touched lightly.
Conclusion
In conclusion, the idea of repointing over the old mortar totally fails, and it’s not advised by professional repointing contractors. However, being practical about it is essential for the lasting durability of the masonry of your residential and commercial properties.
Sardar Restoration Corp. proudly serves every corner of NYC, including the Bronx, Manhattan, Brooklyn, Westchester, and Queens. Our services are designed to meet your needs, providing top-quality solutions wherever you are. Check our service areas to see how we can assist you in your location.
Contact us today at (+1) 917-355-8556 or sardarrestoration@gmail.com, or visit us at 2770 Fish Ave, Bronx, NY 10469, United States.
FAQs
Do you remove the old mortar before repointing?
Yes! Sardar Restoration Corp. adds the old mortar removal to the reporting process for better results. Removing the old mortar before applying the new one helps in the excellent adhesion and offers lasting durability.
Will repointing fix moisture problems, too?
For sure! Repointing can properly seal the gaps and voids that let the water penetrate. Repointing helps in efficiently fixing moisture problems.
What kind of properties do you work on?
Sardar Restoration Corp. works on small- and large-scale projects of residential and commercial properties in NYC and in all five boroughs.
How long does repointing take?
It depends on the scope of the project and the severity of your property damage. Most of the repointing projects take 2-5 days to execute.
