Roof Joists Repair Cost Guide

In this article, we dive deep into the roof joists repair cost and the factors that can determine when it comes to budgeting for your next repair project.

The structural beams known as roof joists are frequently made of wood. These beams typically connect opposing walls and support the roof above while running horizontally. It is common for roof joists to deteriorate and rot over time, necessitating replacement.

It is crucial to keep the structure up to code in order to support the weight of the roof, timbers, and coverings. In the UK, the average price to repair a three-bedroom home’s roof joists ranges from £250 to £500 per beam.

To either fix damaged joists or completely replace the roof, you would typically need the help of a roofing specialist or professional carpenter. In this article, we’ll explain everything you need to know about roof joists and the factors you should take into account before repairing or replacing them.

Roof Joists Repair Cost

Why Roof Joists Need Repair

Before consider the roof joists repair cost, let’s explore if you need a roof repair in the first place. Your roof joists may fail for a variety of reasons, but water poses the greatest risk in most cases. Wooden roof joists will inevitably rot if there is a leak or persistent penetrating damp in your home. It is crucial to have a structural expert inspect any areas that might be affected by water damage.

If you discover that your home’s roof joists are damaged, this could result in serious issues that need to be handled right away. Sagging roofs and ceilings, overloaded areas, and the rot of the neighboring structure can all result from rotten roof joists. To properly plan an appropriate course of action, you should make sure that you have correctly identified the source of the issue before attempting any repairs.

The incorrect repair of rotten or damaged roof joists can be expensive and cause additional problems for your home in the future. Most likely, one of three options will be suggested by your professional roofer or structural engineer.

The repair of the beam using timber resin materials, the use of specialized repair plates, or, in cases of severe damage, the removal and replacement of the entire joist and truss are the options for replacing roof joists.

Things to Consider Before a Roof Joist Repair Project

Before attempting to replace or repair a roof joist in your home, there are a number of things you should take into account. Better preparation and being more aware of certain factors can help save certain roof joists repair cost so it’s important that you do so.

Prior to treating the beams themselves, you should first think about removing the damage’s source after determining the issue. By doing so, you will eliminate all potential for future damage and gain a better understanding of how to maintain the standard of your roof. You should also think about the type of treatment you want to use.

As we already mentioned, there are three primary methods for replacing or repairing damaged roof joists. Your qualified tradesperson can help you decide which method is best for your situation. The restoration of your roof joists will probably generate a lot of noise pollution.

Your daily routine may occasionally be temporarily disrupted by the work, just like with any other significant home improvement project.

As the work is being done, take into account how you will prepare for and manage to live in what may occasionally seem like a construction site. Before hiring a skilled tradesperson to work on your home, we always advise comparing prices.

As with any other service, different contractors will offer varying quotes for the work, so be sure to get multiple quotes in order to get the best price. You must recognize the severity of a defective or unsupported roof if you are thinking about performing the repair yourself.

By seeking professional advice, you lessen your likelihood of incurring unforeseen expenses and experiencing unexpected complications. They will also ensure that they adhere to specific roofing standards. The majority of the time, roof joist damage doesn’t end with visible surface damage. Keep in mind that performing repairs of a poor or subpar quality frequently necessitates more expensive and extensive work to address the issues.

Always take into account saving money to cover unforeseen costs because you might encounter a number of unpleasant surprises.

Repairing Roof Joists Yourself

While replacing or repairing a damaged roof joist is a difficult process that demands precision, it is not completely impossible to attempt a DIY roof joist repair.

Rotten roof joists are a serious issue that frequently cause additional problems and harm to neighboring structures. There may be visible signs of rotted or damaged wood, but there will also likely be hidden damage.

A roof joist repair must be completed correctly using the right methods and materials in order to be successful. You must use the appropriate tools for the job if you plan to attempt a roofing job on your own.

You shouldn’t try to move roofing joists by yourself because they are very heavy. Never attempt the installation or repair if you are unsure of anything as it could be dangerous and result in expensive repairs and damages to your property. In this example, we’ll walk you through a quick, step-by-step process for mending a wooden roof joist with wood.

Step 1: Use a chisel to remove any readily apparent rotten wood. The wood should easily and forcelessly come away.

Step 2: Establish the size and scope of the repair or replacement project. The length of wood needed for the space should be measured. Measure the area where the rotten wood was removed if the joist is only partially damaged.

Step 3: Cut the wood to the appropriate size and fasten it in place. Screwing the wood into the opposing top and bottom joists is an option if you’re replacing the entire joist.

Step 4: Apply a specially formulated waterproof sealant to the wood. This will decrease the likelihood that your roof will need to be repaired again and stop further damage. The majority of sealants can be applied to the wood with a paintbrush and are typically found at your neighborhood hardware stores.

Step 5: Check your loft and ceiling for additional signs of damage. Any locations where water might enter the property should be treated. To lessen the possibility of developing additional roof issues, we always suggest asking a professional carpenter for recommendations and advice.

Repairing Roof Joists Checklist

  • Check your roof carefully for any signs of damage. Check the exterior of the building for sagging and darker patches.
  • Determine the extent of the damage and its origin, such as water damage brought on by exposure.
  • To prevent further issues with the roof’s structure, address the root of the issue.
  • For advice, speak with several tradespeople and, if possible, ask for a call-out. To find the best deal, shop around and compare several quotes from different professionals.
  • In order to find the most economical solution, don’t forget to compare the top techniques and products on the market.
  • Ask for details and suggestions on how to take good care of and maintain your new roof joists.



LD Roofing Services Ltd is a highly rated and roofing company in Northampton with over 25 years experience offering all types of roofing services across Northamptonshire and NN postcodes.