
HERITAGE GARDEN ROOMS
BUIILT TO LAST
Heritage Garden Rooms offers premium SIP panel kits, crafted for easy self-assembly or professional installation by our expert team.
SIP panels are the ideal framing material for garden buildings. Typically, only 12 to 16 panels are needed to construct the walls and floor of most buildings. These panels are pre-cut and rebated at our factory, with all structural corners factory-fitted for easy assembly. They simply slide into position and are secured with our supplied fitting kit, resulting in a strong, perfectly straight, and accurate SIP structure completed in just a few hours.
We DO NOT use SIP panels in our roofs. Our testing has shown that SIP panels cannot span roof areas unsupported without long term sagging and developing a permanent bow. Instead, we use insulated panels specifically engineered for roofing. These roofing panels require no internal timber support structure to try to prevent sagging and therefore have no large gaps between the insulation to cause cold bridging, these continuous insulation panels have an overall thickness of 120mm, have an impressively low U-value of just 0.26 W/m²K, come fully finished, feature an off-white interior surface and an anthracite exterior finish. Designed with an overlapping interlocking system and with the appropriate supplied sealants applied between the joints, they securely bolt to our SIP shell frame and to each other, using the bolts included in our fixing kit and can span room depths of up to 7 metres in one continuous panel making roof leaks a thing of the past. The off white interior of the panel makes a perfectly acceptable ceiling finish, or the roof can either be clad directly or if you want to put recessed lighting instead of surface mounted you can fix battens and clad (click and stick upvc will easiest) or plaster board.
Since the roof panels come fully finished, there is no need to be gluing on, or indeed replacing some years down the line an EPDM rubber membrane, saving you both time and money. With the long service life of this commercial grade roof, it is unlikely it will ever need to be replaced.
Our SIP’s kits can be purchased as a complete shell kit, complete shell + exterior kit, or as a complete kit
If you feel self-build is not for you, we have a full installation service, covering all components of your chosen kit.
Our durable UK manufactured 122mmSIP panels are equipped with high-performance EPS insulation, delivering an outstandingly low U-value of 0.22 W/m²K. They efficiently keep out winter cold and summer heat, ensuring optimal year-round comfort. Beyond their superior insulation, these SIP panels solid mass, forms a substantial barrier that effectively blocks unwanted external and internal noise. This creates a peaceful, tranquil garden retreat tailored perfectly to your lifestyle. Our versatile rooms are ideal for a wide range of uses, including just somewhere quiet to read, relax and enjoy your garden, home offices, music studios, games rooms, home cinema, bars and entertainment, man caves, pool tables, home gyms, art studios, sales office, farm shop, hair salon, dog grooming studio, nail / beauty salon, sun-beds, cat grooming, and much more.
Our Complete shell+exterior kits and our Complete kits both include a French Doors that are UK manufactured to ensure high quality, UK standards and future supply of any spares that may be required. All kits with a width of 2 metres will be supplied with 1490mm 2 panel and kits with a width of 3 metre and over will be supplied with a 2700mm 4 panel French Door, finished externally in Anthracite wood effect with chrome door handles and internally in standard white with white door handles, to best match our standard building finish style. The Advance 70 frame and glass is A-rated for thermal efficiency ( A-rating for windows and doors is the most thermally efficient ) and comes with Toughened, Soft-Coat Low – E Glass Units. Security is assured with PAS24 and Secured by Design security standards to the entire window / doors / frame, High Quality 7-Point Reverse Locking system are fitted for that final peace of mind.
Both of these kits also include exterior cladding, UK made from slow growing Scandinavian Redwood/Pine thick stock blanks, which have been kiln dried and pressure treated prior to being cut into very attractive half lap cladding. All cladding is pre cut to size and pre drill marked for ease of installation.
All of our kits in include substantial 5 element bonded lintels to bridge over doors and windows. Lintels don’t just have to support their own weight or I just their weight and the roof, in the winter there could be potentially 500kg of snow on just a small roof and some of our bigger kits roofs could have well in excess of a 1000kg on top, all trying to deform the lintel onto the windows and doors below. Our 5 element lintels are more than capable of withstanding this pressure, ensuring your windows and doors will continue to function as intended.
WANT SOMETHING SLIGHTLY DIFFERENT?
- Change windows/door styles sizes
- Add / delete windows or doors
- Change cladding
- Add an internal partition
- Make a suggestion of your own, we will evaluate your ideas and if it’s something we can do for you we will be happy to help








Whether you’re a novice self builder, or an experienced professional builder, our kits are designed to provide a complete and enjoyable experience.
Our kits include everything you need to get started quickly and easily
COMPLETE SIP SHELL KIT
- High-quality materials and components
- Step-by-step instructions with detailed illustrations
- All SIP’s panels cut to size, rebated, structural corners/connections fixed into place
- External breather membrane wrap
- If you are using ground screw or Swift plinth foundations, flooring SIP’s have a breather membrane fitted, if you are using a concrete slab foundation then we will include a 1200 gauge damp proof floor membrane.
- Sole plates and top plates (cut to size)
- Floor perimeter timbers (cut to size)
- Floor jointing splines or timbers (cut to size )
- Wall jointing splines ( cut to size )
- Substantial 5 element glued and screwed Door / Window lintel
- Roofing panels cut to size with 75mm rain water anti capillary rebate
- SIP’s panel connection bolts 8mm x 180mm
- Sole plate fixings
- Top plate fixings
- Assembly kit, everything required to assemble our kit as supplied
- Sealants & adhesive
- Shell kit is pre assembled at our factory to ensure a perfect fit of all components prior to packaging
SHELL KIT PRICES

SHELL + EXTERIOR KIT
kit includes everything in the SIP shell kit plus the following
- 25 x 50mm pressure treated battening (sufficient to double lay both vertical then horizontal to allow air flow behind cladding).
- External wood cladding to front and side aspects
- External Anthracite grey or Charcoal grey sheet cladding to rear aspect
- Option to upgrade to wood cladding to the rear aspect
- Roofing edge finishing flashings for the entire roof perimeter
- Guttering mounting boards to the rear aspect
- Anthracite grey guttering, end stop, connector, mount brackets, end outlet, down pipe with mounting brackets
- French doors 2700mm (except for when selecting 2m room width), double glazed, chrome door handles, 150mm sill, trickle air vents and fitting kit
- French door wood surround, matching cladding.
- Decking and separate mounting frame ( we DO NOT extend the floor SIP’s out to mount the decking, with the associated long term water penetration into the buildings flooring )
- Fitting kit includes sealants and screws for cladding/decking/flashings etc
SHELL + EXTERIOR KIT PRICE

COMPLETE KIT
Kit contains everything in the complete shell + exterior kit plus the following
- Internal wall cladding Matt white, Gloss white or Gloss white ash wood
- 70mm smooth radius white PVC skirting board
- Flooring – we include a range of vinyl flooring options, that not only look great but also help keep the build price down
- Ceiling battening
- Internal roof cladding choice of finish
- Recessed low voltage ceiling lights/wiring/switch
- Recessed exterior low voltage porch lights/wiring/switch
- Plug and play mains electric kit, pre wired consumer unit with RCD and MCB with plug and play connection, pre wired 2x double mains wall sockets, each with 2m cable and plug and play connections, external 16amp inlet with 2.5m cable and plug and play connection.
COMPLETE KIT PRICES

Contact us
HERITAGE GARDEN ROOMS
UNIT 7 COOKS WAY INDUSTRIAL ESTATE COOKS WAY, HITCHIN, HERTFORDSHIRE, SG4 0JE
Telephone: 07877 970717
Email: sales@hgr-hitchin.co.uk