endurance composite doors don't warp

Do Composite Doors Warp?

Our composite doors don’t warp as much as uPVC or timber profiles, and they’re even less susceptible to warping than most other composite doors on the market. In fact, they don’t suffer from a lot of issues that traditional replacement doors have such as warping, discolouration, contracting and more. The way in which Endurance composite doors are created means that they will rarely experience issues with warping due to the advanced manufacturing techniques and state of the art technology that we use. Compared to other door styles, there are very few problems with composite doors.

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Traditional timber and uPVC doors tend to warp due to exposure to moisture. With the correct elements and finish, a door can look brand new even years after being installed. Endurance doors are created using a combination of materials, each chosen for their specific properties to result in a superior door that is strong, durable, thermally efficient, secure and aesthetically pleasing. We are proud to say Endurance composite doors will not fade.

Why Endurance Doors Don't Warp

Most commonly, timber and uPVC doors are installed and after some time the moisture inside them evaporates, resulting in shrinkage and warping. The way in which our composite doors are created counteracts these issues and make for a weatherproof and durable solution that will stand the test of time. You won’t have to worry about leaks, draughts or water ingress.

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Our 48mm thick solid timber door slab is made up of 17 engineered timber laminates, resulting in an unrivalled profile that is 10% thicker than most other composite doors. You will be investing in a door that is strong, robust, extremely secure while exuding the look and feel of authentic timber.

You don’t have to compromise on functionality over style with the exceptional Endurance composite door range. The Country Collection, Classic Collection and Urban Collection each feature an extensive choice of designs, styles and finishes to choose from to make the perfect first impression of your property. You can invest in a stunning solution that will look good even after heavy or frequent use.

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Our HomeView Door Designer offers a simple to follow step by step process, enabling you to construct your ideal composite door and see how it looks on your home.

Rockdoor and Solidor Reviews

Negative 1 Star Reviews

As of recent months, Rockdoor and Solidor have been bombarded with an influx of negative reviews regarding the warping of their composite doors. Unfortunately, these negative reviews are having an effect on the suppliers and installers as opposed to just the manufacturing brand.

Composite Door Reviews
rockdoor reviews

Rockdoor Composite Doors

Rockdoor, in particular, has received a review regarding in installation of a Rockdoor from SRJ. However, SRJ has had to take the brunt of the review when in fact, the issue lay solely with the door itself, not the installation.

After having three replacement doors due to the issues of their door warping for the 3rd time, the customer stated: “We were going to use SRJ to replace the double glazing for the whole house – we won’t be now”. Such a comment puts a negative impact on the installer rather than the manufacturer of the doors.

As the customer mentioned, SRJ is a trusted installer of Rockdoor. However, due to this issue, they are now marked as a poor installer by this customer. SRJ is the installer here, meaning that they only install a door that has been prior built by Rockdoor. The issue of the door warping is inevitable due to the door itself, not the installation process, and Rockdoor reviews do not accurately reflect this.

Solidor Composite Doors

Solidor composite doors are commonly known as one of the top leading composite door manufacturers. However, after looking among Solidor reviews, we have found that with an average rating of just three stars on TrustPilot, they have a range of negative reviews regarding the warping of their doors.

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What is the Cause of Door Warping?

Most commonly a front door is installed and there are no issues for a short period of time. During the winter, however, you’ll find that causes of warping become more apparent with the central heating being used more and therefore drying out the moisture from the air and the content of the door. This is when warping or contracting begins to show.

Warping occurs when a length of wood is exposed to changes in moisture and temperature over a long period of time, causing it to expand and contract against the grain. Our Endurance composite doors are created using 17 engineered timber laminates giving it an inherent strength that protects the door from changes in temperature.


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Endurance composite doors rarely suffer from warping as they are created using premium quality materials and finished with a high quality laminated door skin. This skin weatherproofs your door from adverse weather conditions, scratches and dents. It also means that your home is watertight, no matter the weather.

Authentic Timber Aesthetic

Whilst our composite doors may mimic the appearance of timber doors, our composite doors will not warp to the extent that traditional wooden doors do. Instead, you’ll find that when your composite door has been installed your home will be warmer for longer, your energy bills will be lower and your carbon footprint will be reduced.

This is why Endurance composite doors are such a worthwhile investment, giving you all of the above features and benefits as well as helping you to save money over time and reducing your living costs, meaning they are extremely cost-effective.

timber composite doors warp

How Are Composite Doors Made?

17 Laminations

Our composite doors are made up of 17 laminations with a solid timber core. We use BBA accredited, engineered LVL (laminated veneered lumber.). Our 48mm thick core offers exceptional stability and eliminates the possibility of warping over time. Each door is manufactured with an integrated Moisture Barrier System in the base of the door which protects your door from water damage, delamination and maintains its integrity, avoiding common problems with composite doors.

Door Skin

Endurance composite doors feature a laminated door skin with a highly weatherproof and durable acrylic layer, offering exciting vivid colours and luxurious wood effect designs that perfectly match the door frames into which they are installed. Our replacement front doors are finished with a foiled 3D Cool Skin that features an embossed woodgrain texture to offer a surface that won’t crack or fade. Available in 16 colours ranging from neutral shades to bold bright tones, you can create a composite door solution that is colour lasting and will continue to look great even after years of use. Once you’ve selected the style, and design of your new door and applied your preferred colour you can add finishing touches to your composite door with a wide selection of hardware and security options. Select from handles, knockers and letter plates to personalise your door and make it your own.

Hardware Options

With 10 hardware colours to choose from including Gold, Graphite, Antique Black and Chrome you’ll be spoiled for choice when it comes to putting the final touch to your composite door. Created to blend into the surroundings of your property and to complement your existing décor, we know that you’ll be pleased with the finished result.

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what are the benefits of the solid timber core external doors

Solid Timber Core

The Endurance door has a solid core unlike others. This robustness means there are more advantages and far fewer problems with composite doors from us compared to other companies.

With 48mm thick cross-bonded veneered laminated timber door lead, Endurance composite doors deliver lateral strength and unrivalled stability.

We use Kerto LVL for our solid core, a material which is incredibly strong and dimensionally stable timber beam. The makeup of our solid core is designed so that it can be cut to any height or width without affecting its integral strength.

Our solid core competitors use cores that incorporate less dense mixed species woods with a stile and rail subframe. The core’s strength comes from the outer subframe in these doors. A narrow or short door involves cutting into this subframe and cutting away the strength of the door. These doors don’t always hold their shape when facing the temperature changes of British weather and central heating.

We are so confident in the quality of our Endurance composite door we offer a 3mm bowing guarantee on our doors.

Build Your Door
Design Your Door Image


Our HomeView Door Designer offers a simple to follow step by step process, enabling you to construct your ideal composite door and see how it looks on your home.