Chert Building Solutions Limited

Chert Building Solutions Limited General Construction | Office Refurbishment | Repair and Maintenance | Sustainable Construction

Building on Black Cotton Soil (Kenya)Planning to build on black cotton soil? Read this first.It may look firm when dry—b...
26/05/2026

Building on Black Cotton Soil (Kenya)

Planning to build on black cotton soil? Read this first.

It may look firm when dry—
but black cotton soil is one of the most problematic soils to build on.

Why?

Because it expands when wet and shrinks when dry.

Here’s what that means for your building:

1. Foundation Movement
As the soil expands and contracts:
👉 your foundation moves
👉 walls develop cracks
👉 floors can shift

2. Structural Stress
This constant movement puts pressure on the structure over time.

Even a well-built house can develop issues if the foundation isn’t designed properly.

3. Higher Construction Costs
Building on black cotton soil is not impossible—
but it is more expensive.

Why?

Because it often requires:

Deeper foundations
Soil replacement
Special structural design
The mistake most people make:

They build normally—like they would on any other soil.
👉 That’s where problems begin.

👉 The right approach:

Before you build:
✔ Conduct a soil test
✔ Engage a structural engineer
✔ Use the correct foundation design

In some cases, solutions include:

Excavating and replacing the soil
Using raft foundations
Proper drainage control

Good construction is not just about materials—
it’s about understanding your ground.

We guide clients to build safely and avoid costly mistakes.

📞 Chert Building Solutions Ltd
0718 178 142

Soil Conditions & CostBefore you build… understand your soil.Two plots can look exactly the same on the surface—but cost...
19/05/2026

Soil Conditions & Cost

Before you build… understand your soil.

Two plots can look exactly the same on the surface—
but cost very differently to build.

Why?

Because what’s underneath matters more than what you see.

Here’s how soil affects your construction cost:

1. Foundation Depth
Weak or loose soil means deeper foundations.
More excavation. More concrete. More steel.

2. Foundation Type
Some soils can’t support standard strip foundations.
You may need raft foundations or special designs.
👉 That’s a major cost shift.

3. Excavation Difficulty

Soft soil → easy digging
Rocky ground → slow, expensive excavation

Labour and time both increase.

4. Soil Movement (Clay Soils)
Some soils expand and shrink with moisture.

If not handled properly:
👉 cracks
👉 structural stress
👉 long-term damage

The mistake most people make:
They skip a soil test to “save money.”

But that decision often leads to:

Design changes mid-project
Unexpected costs
Structural problems later
👉 The right approach:

Do a soil test before you design or build.

It gives you:

The right foundation design
Accurate cost estimates
Confidence moving forward

Good construction starts from the ground up.

We guide clients to make the right decisions before they build.

📞 Chert Building Solutions Ltd
0718 178 142

Building soon? Read this first.The biggest mistake you can make is starting without proper guidance.Construction is not ...
11/05/2026

Building soon? Read this first.

The biggest mistake you can make is starting without proper guidance.

Construction is not just about building—
it’s about making the right decisions before you start.

👉 We help you:

Review contractor quotations
Understand your actual costs
Plan your project properly

A small consultation now can save you a lot later.

📞 0718 178 142
Chert Building Solutions Ltd

Site SupervisionThis is what most clients underestimate…Even a good contractor needs supervision.Why?Because:Mistakes ha...
10/05/2026

Site Supervision

This is what most clients underestimate…

Even a good contractor needs supervision.

Why?

Because:

Mistakes happen on site
Shortcuts are tempting
Details are easily overlooked

👉 Regular supervision ensures:

Quality work
Correct materials
Proper ex*****on

What is not checked… is often not done right.

Bill of Quantities (BQ)This document can save you millions.It’s called a Bill of Quantities (BQ).Most people ignore it—b...
09/05/2026

Bill of Quantities (BQ)

This document can save you millions.

It’s called a Bill of Quantities (BQ).

Most people ignore it—
but it’s one of the most important tools in construction.

It:

Breaks down all costs
Defines scope clearly
Helps compare contractors fairly

👉 Without a proper BQ, you’re guessing.

And construction should never be guesswork.

Project DelaysWhy most construction projects delay…It’s rarely just one issue.Usually it’s:Poor planning at the startInc...
08/05/2026

Project Delays

Why most construction projects delay…

It’s rarely just one issue.

Usually it’s:

Poor planning at the start
Incomplete drawings
Cash flow interruptions
Unclear scope

👉 A smooth project starts before construction begins.

Good planning = fewer surprises.

Delays are expensive—not just in time, but in cost.

Chert Building Solutions Ltd | 0718 178 142

Cracks in WallsSmall cracks can tell a big story.Not all cracks are serious—but some are warnings.Common causes:Poor fou...
07/05/2026

Cracks in Walls

Small cracks can tell a big story.

Not all cracks are serious—but some are warnings.

Common causes:

Poor foundation design
Soil movement
Weak concrete
Rushed workmanship

👉 Don’t just cover cracks—understand them.

Paint hides the problem, not the cause.

A proper assessment saves you from bigger repairs later

📞 Chert Building Solutions Ltd | 0718 178 142

Hidden Costs in FinishesFinishes are where budgets quietly double.Tiles, paint, ceilings, fittings—this is where most pe...
06/05/2026

Hidden Costs in Finishes

Finishes are where budgets quietly double.

Tiles, paint, ceilings, fittings—
this is where most people lose control of costs.

Why?

Because:

Prices vary widely
Decisions are made late
Upgrades happen during construction

👉 Decide your finishes early.

It gives you:

Cost control
Better planning
Fewer surprises

Most overruns don’t come from structure—
they come from finishes.

📞 Chert Building Solutions Ltd | 0718 178 142

Concrete StrengthNot all concrete is the same.You’ll hear terms like Class 20 or Class 25.In simple terms:Class 20 → lig...
05/05/2026

Concrete Strength

Not all concrete is the same.

You’ll hear terms like Class 20 or Class 25.

In simple terms:

Class 20 → lighter structural use
Class 25 → stronger, more durable

Using the wrong class in the wrong place?
That’s where structural problems begin.

👉 Always confirm the concrete mix being used on your site.

And don’t just trust words—ask for testing.

Quality is not something you guess.

📞 Chert Building Solutions Ltd | 0718 178 142

Before you build, read this…Most people focus on the cost per square metre…but ignore what actually drives that cost.Her...
01/05/2026

Before you build, read this…

Most people focus on the cost per square metre
…but ignore what actually drives that cost.

Here are 3 things that quietly increase your budget:

Soil condition (foundation changes everything)
Design complexity (shapes = cost)
Finishes (this can double your budget)

A “cheap” quote often ignores these—
and the cost comes back later as variations.

👉 Plan properly before you start.

We help clients review costs before committing.
📞 Chert Building Solutions Ltd | 0718 178 142

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