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Why Does It Cost So Much For A New Roof?


8th February 2019

New Roof Cost - Roof Stores
New Roof Cost

Changing the materials on your roof costs a lot of money. Sometimes there is no way of avoiding it if the lifespan of your existing roof has reached its end. But why does it cost so much for a new roof to be installed? Read on to find out the various reasons why so you can understand how much work goes into installing a new roof.

What affects the price of a roof?

There are several factors that will determine the price of a new roof. These include:

  • Size of the roof

Once the roofers have measured the square footage they can then determine the amount of materials need to cover the surface.

  • Roof pitch

The pitch, or slope, of the roof will determine the difficulty of the job. Anything too steep will require more safety and labour to complete it successfully. The roof pitch also determines the type of underlay being used which also affects the price.

  • Roofing being removed

In most cases, how long it takes to tear off the existing roof will affect the cost. This will also include disposal costs to safely move the materials away from the property. The heavier the material, the longer it will take to complete this stage.

  • New material being used

There are a wide range of roofing materials available. This is also reflected in the prices. The weight, durability and design of the material all play a role in the price being paid. Much will depend on the climate you live in and the budget available to you.

  • Additional components

Installing a new roof isn’t just placing new tiles onto the surface. The type of decking materials and underlay play a key role in keeping the roof waterproof. There will also have to be adequate insulation and ventilation to ensure the roof remains in good health for years to come.

Signs you need to replace your roof.

It’s not always just a leak that will determine you need to replace the roof. Here are some signs to look out for:

  • Age of the roof

A well installed roof should last at least 20 to 25 years. You should also check to see if it has sufficient ventilation and what type of work was done when it was installed last time.

  • Damaged tiles

Tiles that are buckling, cracked or loose could be a sign you need to install a new roof. You may be able to repair just the loose ones, but if it is happening right across the roof, chances are you need a lot more work done.

  • Roof valleys

Check the valleys on the roof to see if tiles are missing there too. This is an important part of any roof and missing tiles is usually a sign you need a new one. If let unrepaired, you are likely to start experiencing leaks inside the house.

  • Tile granules in the guttering

When tiles reach the end of their life, they tend to shed granules which are collected by the guttering around the edge of the property. Take a look to see if there is a consistent build up on your roof.

  • Roof board gaps

If daylight is coming through the roof into the attic, this could be a sign your old roof is on the way out. If the roof feels soft and bouncy as you walk on it, the underlay m have been weakened by exposure to moisture.

What are the different sections of a roof?

Professional roofers will know the terminology and the various parts that make up a roof. For newcomers there is a lot to learn, but to help, here are some of the major components of a roof structure.

  • Roof Truss

This is the skeleton of the roof structure, made up of a framework of beams that support the entire roof.

  • Rafters

These are part of the roof truss that run from the top to the bottom of the roof.

  • Decking

The panels cover the rafters and this is what tiling will be attached to during installation.

  • Underlayment

Roofers place this on top of the decking before roofing materials are used to add moisture protection.

  • Fascia

This is a fitting added to the end of the eaves to cover the rafter.

  • Soffit

Attached to the underside of the eaves covering the gap between its edge and the house.

  • Valley

Where two sloping roof places meet is called a valley. As seen on a cross cable or cross hip roof.

  • Ridge

This runs the length of the roof and is also its highest point.

  • Flashing

Pieces of metal that stop water seepage on any intersection such as chimneys, valleys and vent pipes.

How long does a roof last?

There is no set time period for how long a roof will last. It will depend on a number of things:

  • Roofing material

The type of covering you install will have a big say on how long the roof will last. You also have to factor in the climate in your area. If there is a lot of wind and rain, this will test the durability of the materials and may require more repairs to be made over time.

  • Underlayment

The waterproof material underneath the roof covering is there to protect the interior from rain, snow, ice and moisture in general. Investing well here could make all the difference. Once moisture gets inside the roof it can wreak havoc, so it pays to have a good waterproof layer in place.

  • Ventilation

If your loft or attic is well ventilated, this could end up adding a considerable amount of years to the lifespan of your roof. It will keep the space cooler and prevents it from becoming too warm and moist. The spreading of rot or damp can quickly move down into the house and cause all sorts of issues.

  • Installation

A well installed roof from a reputable company will go a very long way to ensuring you have a good roof for at least 20 to 25 years. Poor workmanship is one of the biggest reasons why materials deteriorate before their time.


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