Keep Old Buildings Happy and Clean

Table of Contents

Do you like big old buildings and castles? I do! They are called historic buildings and cultural relics. These places are very special. They tell us stories. They need cleaning, but we can’t hurt them!

Why Do We Clean Old Buildings?

Old stones, bricks, and masonry get dirty.
Dirt, grime, algae, and soot build up.
Monuments, churches, and statues do not look good when dirty.
If we don’t clean them, they can fall apart.

We want to save our past! Great cleaning can make a building look new—but do it wrong, and oops! You could break it.

What Is High-Pressure Cleaning?

High-pressure cleaning trucks use water that shoots out really fast. This can take away tough dirt.

The trucks have big water tanks.
They use hot water or cold water.
We can make the water go soft or strong by turning a knob.
Different nozzles spray in many ways—some wide, some thin.

These trucks are like giant hoses on wheels! You can clean a whole museum or big castle with them.

But Wait—Is It Safe?

Not always! Old buildings can crack if we use too much pressure. Think about washing your hands. Does it hurt if you turn the water up too high? Old stone and mortar feel the same!

Check this out:

Material	Is it easy to harm?	Needed Cleaning Power
Sandstone/Limestone	Very easy.	Low pressure needed.
Old Brick & Mortar	Very easy.	Gentle pressure only.
Modern Brick or Granite	Harder, but still careful!	Medium is OK.

References:

National Trust
Getty Conservation Institute
Historic England

What Can Go Wrong?

Too much pressure: Breaks soft stone, scrapes away good parts.
Water goes deep: Makes the inside wet. Later, it freezes and cracks!
Patina: It’s the pretty old ‘finish’ on old stones. You can wash it away.
Biological growth: Algae, moss, or lichen can come back if you do not kill it.

The Best Way: “Refined” Cleaning!

Here is how to clean right:

Look first! We find what kind of stone, brick, or mortar it is.

Test a bit. Clean a tiny spot, then stop and check. Did it work?

Low and slow! Use as little water as possible. Use “soft washing” or “low pressure cleaning” settings.

Hot water helps. Steam or warm water can clean without harsh chemicals or scrubbing.

Wide nozzles work best. They spread the water out. No tiny, hard jets!

Use gentle brushing. Sometimes just a soft brush and water is best!

Let it dry. Water needs to go away fast so the wall doesn’t stay wet.

Experts like the CLW GROUP can do this! We give advice, bring the trucks, and train workers to be gentle.

Why Use a High-Pressure Cleaning Truck?

Big water tanks mean more cleaning, fewer stops. Great for remote places!
Hot water for tough jobs. Soot and algae go away fast.
Gentle yet strong! We control how fast and hot the water is.
Vacuum recovery. The trucks can suck up all the dirty water. No puddles.
Modern controls keep it safe and right for each surface.

If you need to clean a big castle or church, a truck is smart. You cover a lot of space slowly and gently.

Other Ways to Clean Old Buildings

Not every job needs a truck! Sometimes, we use:

Nebulous spray (soft mist, very gentle)
Poultices (put paste on, let it suck out stains)
Laser cleaning (light beams! Very cool)
Dry ice blasting (super cold, uses no water)
Brushes and little tools—for fine details.

Trained teams know when trucks are best and when something else is needed.

Real-Life Stories

Good Story:

A team used a truck on a big sandstone building. They started with soft water jets (under 100 PSI). They tested, checked, and cleaned slowly. The building’s facade looked great—no damage!

Bad Story:

Another group used a strong washer (over 1500 PSI) on old bricks. The bricks and mortar washed away. After rain and freeze, the wall fell apart.

What’s the lesson? Be smart, not fast.

The Law Says: Be Safe

Many cities and groups say you must:

Get a permit
Hire heritage cleaning experts
Ask groups like UNESCO or your country’s National Trust
Take pictures before and after
Write down all the steps

We help our customers with all of this—right from start to finish!

The CLW GROUP Way

We at CLW GROUP are building pros. We make special cleaning trucks and equipment. We help you with:

Custom trucks for your job—big, small, hot water, special nozzles!
Fast delivery. We bring the truck to your site.
After-sale care. If you have any problem, we can fix it.
Expert advice. Our pros teach your team how to keep buildings safe.
Quality you can trust. We work with the world’s best (like National Trust (UK) and Historic England).

If you want a cleaning truck, see our special trucks factory. Maybe you need a water tank truck for heritage cleaning? We have those too.

Table: Why Choose CLW GROUP for Historical Cleaning?

Need	CLW GROUP Solution
Gentle cleaning tools	Custom pressure & nozzles
Large area, no water source	Big onboard water tanks
Eco-friendly water use	Vacuum & recycling systems
Training and advice	Free technical consulting
Quick help if problems	After-sales service

Let’s Save History Together!

You love old buildings. We know how to clean them. Let’s work as a team!

See more about our cleaning trucks and heritage vehicles or ask for a free consult to keep your historic building safe, shiny, and happy for many years.