Interseal South West LTD:

Windows, doors and conservatory installation experts in Plymouth and the South West

Interseal works to provide clients living or working in Plymouth and the South West with high quality designs and installations on a range of products, including conservatories, windows and roofline products. We have a strong reputation across the region as a certified stockist and we are FENSA-approved.

Get in touch now


From Bay & Bow windows, Casement windows, and Sliding windows, to Energy Efficient options. Browse our full range here.


Our selection of doors include: French doors, Bi-Folding doors, Patio doors, Porch doors, and more. See all options here.


We complete conservatory conversions and new installations, covering bungalows, garden rooms, and more. Explore our conservatories here.


We’re here to advise you on important fascias, guttering and rooflines for your home, and which options are best suited to your requirements.

For Window, door, conservatory consultancy and installation

At Interseal, we’ve built an unmatched reputation for high-quality products and professional workmanship, specialising in both domestic and commercial projects across Plymouth and the surrounding area. 

 Whether you’re looking for window, door or conservatory installation, as well as roofline products, or energy efficient options, we’ve got it covered. Our products are designed to last and give you the best solution for your home, budget, style and other specifications.

Our team of experts are here for every step of the journey, and we offer free, no-obligation consultations to discuss your ideas and space in question. Here, we’ll walk through options available and their features, so you can make an informed and confident decision about what to do next and bring your vision to life.


Request a call back

We’ll get back to you as soon as we can.

Why choose Interseal?

No deposit required

10-year backed guarantee


Our Customer Reviews

Very professional workers…
October 17, 2019

...who kept us well informed at each stage of the process. The work was to an extremely high standard and we are very pleased with the end result. I would definitely use Interseal again if I had need.

An excellent contractor…
October 17, 2019

... Friendly and competent staff who on two occasions now have provided a professional service at a value price.

I will use this company again without any hesitation.
February 28, 2020

I think my above valuation sums up everything I want to say.

  • 9.52 average from 385 ratings on HomePro 95% 95%

Call us today for a FREE QUOTE on 01752 340500