Greenhouse Glazing in Hail: Glass or Polycarbonate?
Greenhouse guide
The short answer on planning for hail
Where hail is frequent or severe, polycarbonate is often considered for its inherent impact resistance. Glass can still be suitable when maximum clarity and a classic look matter to you, provided the site, installation and possible damage are considered carefully.
Never assess glazing in isolation. A stable foundation, correctly fitted profiles and a location without avoidable hazards are equally important. Before buying, also check what your insurance policy and the written details for the chosen configuration actually cover.
01
For hail-prone locations
Polycarbonate can be a sensible choice if you prefer robust panels and are comfortable with diffuse light for your plants.
02
For clear garden architecture
Glass suits projects where transparent views, precise lines and visibility of plants are central.
03
For a sound decision
Assess local weather experience, the installation site, build quality, maintenance and the consequences of possible damage together.
Greenhouse Glazing in Hail: Glass or Polycarbonate?
Anyone planning a greenhouse in Malta should treat hail as a possible weather load. The size, hardness and angle of impact of hailstones can vary considerably between areas and thunderstorms. There is therefore no universal glazing choice that is automatically right for every garden. What matters is how exposed your site is, which plants you intend to grow and the design standard you expect from the structure.
Glass offers a clear view, a calm architectural effect and the classic character of a garden greenhouse. Polycarbonate, by contrast, has a more diffuse appearance and is often chosen where a panel solution that is less prone to breakage is the priority. Both materials deserve careful consideration: not only the glazing, but also the frame, fixings, foundation and correct installation affect the resilience of the whole greenhouse.
This guide sets out the key differences and helps you ask the right questions for your site. It does not replace checking the relevant product documents or obtaining an individual assessment for unusual site conditions. Bringing weather risks, use and maintenance together before purchase supports a considered, long-term decision.
01 · Material choice
Assess hail risk
Hail is not a uniform event. Smaller stones affect glazing differently from larger ones, while wind, direction of fall and the duration of a storm also matter. Look beyond general weather reports and consider experience from nearby properties. Free-standing gardens in exposed ground can have different requirements from sheltered courtyards or densely built-up residential settings.
Material selection should begin with an honest risk assessment, not an assumption of absolute safety. Glass and polycarbonate respond differently to impacts by design. It is just as important that glazing is fitted correctly within the frame. Loose components, uneven ground or unsuitable fixings can worsen loading and should never be treated as minor details.
Do not judge the surroundings only by visible shelter. A nearby wall may calm one weather-facing side, while downpipes, roof overhangs or swirling air can create added stresses. Allow adequate distance from building edges and make sure rainwater is directed away in a controlled manner. This keeps the area accessible and makes the structure easier to inspect after a storm.
Future use also affects risk assessment: frequently opened doors, work around the roof area and stored equipment should remain well clear of glazing and maintenance routes.
Record hail events from recent years and ask neighbours about typical conditions at the exact site.
Consider open wind channels, large tree canopies and roof edges that may create additional risks during thunderstorms.
For a free-standing starting point, a Standard-Classic aluminium greenhouse provides a straightforward basis for planning.
02 · Site
Location matters
A greenhouse beside a house, a high wall or beneath trees experiences rainfall differently from one on open lawn. Shelter can be beneficial, but brings its own issues: dripping water, falling branches or runoff from roof surfaces should be considered when choosing the position. Observe the intended area deliberately in rain and wind.
For a lean-to installation, the relationship between the building surroundings and greenhouse needs particularly careful planning. Water management, access and nearby downpipes deserve attention. The wall does not automatically make glazing hail-safe, though it can influence microclimate and exposure. Keep maintenance access clear so panes, frames and junctions can be inspected over time.
Alongside appearance, glass affects views into the greenhouse and the perception of the garden space. If you want plants, equipment and structure to remain clearly visible, weigh this transparency against potential sensitivity to concentrated impacts. Before installation, it is also sensible to inspect every pane and fixing for undamaged edges and correct seating.
With lean-to models, also check whether leaves or moisture collect between the wall and greenhouse. Clear gaps make connections and frame areas easier to inspect.
Avoid positions directly beneath vulnerable branches or areas where roof water strikes in a concentrated flow.
Plan level, accessible ground so inspection, cleaning and any replacement work remain practical.
For a generous house-wall solution, consider a full-fledged classic lean-to greenhouse with a carefully planned installation area.
03 · Glass
Choose clear views carefully
Glass gives a greenhouse transparency and a high-quality, timeless presence in the garden. It keeps plants, shelving and work areas clearly visible and suits traditional garden spaces or architecturally ordered settings particularly well. In hail, however, accept that glass, as a hard material, can be damaged by severe concentrated impacts. A careful assessment matters more than a blanket judgement.
Bloomcabin greenhouse glazing is made from 4 mm toughened glass. This describes the supplied material but does not replace a site-specific risk assessment. Ensure frame supports are clean, seals are fitted correctly and installation follows the relevant instructions. After a storm, inspect pane edges, fixings and any components that may have loosened.
The light diffusion of polycarbonate can noticeably change the character of the interior. Views outside and of individual plants are less sharp, but the overall visual impression becomes more even. Do not decide only on expected weather exposure; consider plant-growing plans and your preference for transparency together. Care instructions for the specific glazing should also be available before deciding.
Comparing samples in different daylight can help. It shows how reflections, views in and the appearance of plants may suit your garden space.
Choose glass where clear views and the classic expression of your greenhouse strongly shape your priorities.
For exposed sites, allow for a visual inspection after exceptional weather events.
For those combining transparency with garden architecture, the Standard-Classic greenhouse with a glass look offers an appealing design direction.
04 · Polycarbonate
Diffuse panels for robust priorities
Polycarbonate is often considered as an alternative to glass for greenhouses when resistance to impact is given greater weight. Its surface creates a different effect from clear glass: incoming light is more diffuse and outlines behind the panels appear less defined. This diffusion can suit many crops, while those who value an unrestricted view will assess its character differently.
The polycarbonate glazing offered by Bloomcabin is 6 mm thick. It remains important to check the exact specification, including profiles and installation instructions. Polycarbonate is not maintenance-free: gentle cleaning, suitable products and avoiding abrasive tools help keep its surface in good condition. Check panel edges and connections regularly, especially after storms or heavy rainfall.
During installation, ensure drainage paths and covers remain free from dirt. Standing water, trapped seals or holes added later can impair the function of individual components. Use only parts compatible with the construction for repairs, and document alterations to the build. This assists later inspections and keeps the original installation condition traceable.
Remember that the visual effect of diffuse panels varies with planting and furnishing. Coordinate shelving, paths and shading with this character.
Polycarbonate suits planned use where diffuse light and a less glass-like appearance are appropriate.
Avoid aggressive cleaners and rough sponges so the panel surface does not suffer unnecessary wear.
For an extension beside a building, a full-fledged classic lean-to greenhouse with polycarbonate can complement the site concept effectively.
05 · Construction
The frame supports the choice
Glazing can perform its role only as part of the complete construction. Aluminium frames, corner joints, glazing beads and fasteners must belong to the relevant model and be installed correctly. Improvised alterations or unsuitable replacement parts can create stresses and impair secure support for panes. Follow the assembly instructions and seek competent help if you are uncertain.
The foundation also matters for dimensional stability. A distorted base can make doors difficult to operate or prevent glazing from sitting without stress. Plan ground that is load-bearing, level and durable, appropriate to the soil and model. After assembly, check that all components are correctly aligned. This care helps in hail as well as throughout everyday garden use.
Carry out visual checks calmly and without rushing. First inspect from a safe distance for visibly displaced components or loose pieces nearby. Only then examine details of the frame and glazing. Do not use a ladder on wet or unstable ground. Where damage or safe access is uncertain, professional assistance is the prudent choice.
Inspections should not be limited to storms. Watch doors, ventilation elements and transitions in everyday use so changes are noticed early and their cause can be traced.
Before fitting glazing, check that the frame stands plumb and all bearing surfaces are clean.
Keep assembly documents so later maintenance or spare-parts enquiries can use the correct model basis.
A free-standing Standard-Classic greenhouse provides a clear frame geometry for careful installation planning.
06 · Care
Check methodically after a storm
After a hail shower, wait until the area is safely accessible, then inspect the greenhouse in good light. Start outside with the roof, corners and door area before looking inside for fine cracks, movement or moisture. Photograph anything unusual without touching damaged parts unnecessarily. If glass has broken, protecting people comes first.
For polycarbonate, look for visible impacts, cracks, loose end caps or changes to fixings. With glass, damage can be obvious, while fine edge damage may be less apparent. Also inspect gutters, roof connections and the ground immediately around the greenhouse. Removing branches, dirt or standing water makes subsequent assessment and maintenance easier.
Clear documentation starts before any damage occurs. Keep invoices, product documents and photographs so the model, glazing and installation condition remain identifiable. If an event occurs, photograph the condition and secure damaged areas only where this can be done safely. The next steps depend on your policy conditions and your insurer’s response.
Close off the area where glass damage is visible and wear suitable protective equipment during clean-up.
Report a potential claim to your insurer after orderly documentation and follow its instructions.
Inspection remains easily accessible with a full-fledged classic lean-to greenhouse along a house wall kept clear.
07 · Insurance
Prepare for damage and documentation
Whether hail damage to a greenhouse is insured, and to what extent, depends on your individual policy, how the structure is classified and the agreed terms. Do not rely on general statements from acquaintances. Before buying, ask your insurer exactly what information is needed and whether free-standing or lean-to structures may involve particular conditions.
Keep purchase documents, product descriptions, assembly information and photographs of the completed greenhouse in order. In the event of damage, these records can make communication easier, but they do not replace an insurer’s decision. Avoid rushed repairs if an inspection or approval may be needed. Clarify the next steps directly with the responsible party.
It can help to record your decision in writing: which qualities are essential, which compromises are acceptable and which local risks are known? This prevents visual appeal or one material feature from overshadowing all other requirements. Include later access to the roof, side walls and connections. Suitable glazing provides long-term support only when the whole plan suits it.
Ask in advance about hail cover, excesses, documentation duties and any requirements related to the site.
Photograph the greenhouse from several angles after installation and update the images after significant changes.
For well-documented garden planning, a Standard-Classic garden greenhouse can be a well-considered model choice.
08 · Purchase decision
Prioritise glazing appropriately
The right choice follows your priorities. If clear views, classic design and a direct view of your plants matter most, glass may be the fitting option. If your garden is exposed to hail and you place more weight on the impact-resistant character of panels, polycarbonate deserves closer consideration. Neither material removes your responsibility for site selection and installation.
Compare versions using the available product information and plan beyond purchase day to the coming gardening seasons. How easily can you reach the roof and sides? How important are transparency, light quality and cleaning? Which weather events are plausible locally? These questions turn the contrast between glass and polycarbonate into a sound decision for your particular greenhouse project.
Where several criteria seem equally important, note the advantages and open points for each option. A direct comparison supports a decision you can understand later.
Create a personal ranking for hail risk, light effect, appearance, cleaning routine and site accessibility.
Where the construction situation is unclear, check Planning Authority requirements early with a perit and review the chosen product configuration.
For a generous project beside a building, a full-fledged classic aluminium lean-to greenhouse offers a distinct alternative to a free-standing design.
Glass and polycarbonate compared directly
This table is a guide for an initial choice. It describes typical characteristics, not a promise for particular hail events. For a final decision, always consider model documentation, installation requirements and the features of your site.
Appearance
Clear and transparent, with a classic effect.
Diffuse appearance; plant outlines less distinct.
Hail consideration
Hard material; allow for possible breakage.
Often considered where impact resistance is prioritised.
Interior light
Direct views and clear light.
Diffused light with a softer effect.
Care focus
Check edges, panes and fixings.
Clean the surface gently and inspect connections.
Suitable priority
Architecture, visibility and traditional garden aesthetics.
Material character for weather-aware site planning.
Five steps to suitable glazing
Allow enough time for selection. Structured early planning reveals differences that are easily missed in a quick material comparison.
01
Observe the site
View the planned area in rain, wind and at different times of day. Note exposed sides, roof runoff, trees and existing protective features.
02
Gather weather experience
Ask locally about hail, storms and typical directions of rain. Local observations are often more useful than general assumptions.
03
Define the use
Decide whether clear views, decorative effect, propagation, overwintering or a practical work area should chiefly guide the plan.
04
Consider construction
Choose the foundation, site and assembly route to suit the model. Ensure later checks of the roof, sides and connections remain possible.
05
Compare documentation
Read product and assembly information together with insurance terms before ordering. Clarify open questions about the property or project with the competent authorities.
Pre-purchase checklist
Use this list to check whether your choice of glass or polycarbonate suits everyday garden use, not simply the first impression.
01. Hail experience at home and in the immediate neighbourhood has been deliberately checked and recorded.
02. The planned site is not unnecessarily beneath branches, roof edges or concentrated water runoff.
03. Clear views or diffuse light has been clearly set as a personal priority.
04. Foundation, access and assembly area are prepared for the greenhouse size and construction type.
05. The product documents for the chosen glazing and the installation requirements have been read in full.
06. After a storm, the roof can generally be viewed or reached safely for visual inspection.
07. Insurance conditions have been clarified with your own insurer for the specific project.
08. Cleaning, maintenance and possible repairs are included practically and realistically in garden planning.
Frequently asked questions about greenhouse glazing in hail
Is polycarbonate always the better choice in hail?
Not automatically. Polycarbonate is often selected where its inherent impact resistance is particularly important. The appropriate choice also depends on preferred light, design, location, frame construction and maintenance. Check the exact product version and do not assume any material can withstand every weather situation without consequences.
Can a glass greenhouse stand in a hail-prone area?
Yes, glass can still be a considered choice there. Include potential damage in your planning, ensure the structure is assembled carefully or build it correctly yourself, and assess the site attentively. Also clarify in advance with your insurer which conditions apply to your specific greenhouse.
What should I check directly after a hail shower?
First wait until there is no safety risk. Then inspect roof surfaces, panes, panel edges, frames and fixings for visible damage or movement. Photograph anything unusual and keep the area clear where glass is damaged. Before starting major work, coordinate with your insurer where appropriate.
Does the foundation affect hail resistance?
A foundation does not stop hail, but it is important for a stable, low-stress build. If a greenhouse stands distorted, its frame and glazing can be loaded unfavourably. Choose a level, load-bearing base in line with the model instructions and check alignment carefully during assembly.
What role does cleaning play with polycarbonate?
Gentle cleaning helps keep the surface tidy and makes damage easier to see. Do not use abrasive tools or unsuitable products that could affect the panel. After severe weather, inspect connections, edges and fixings particularly carefully instead of looking only at the visible surface.
Do I need permission for a greenhouse?
Whether permission is required depends on the property, dimensions, design, land designation and applicable planning conditions. Do not rely solely on general guidance. Before ordering, ask a perit to confirm the Planning Authority classification for your proposal and identify any necessary third-party consent.
Explore greenhouses
Glazing that suits your garden
In hail, glass or polycarbonate is not simply a matter of taste. Glass stands out for clarity and classic presence, while polycarbonate can suit projects where an impact-focused material choice takes priority. Only the combination of weather conditions, site, construction and intended use makes the choice genuinely robust.
Plan your greenhouse as a complete system and allow time for the groundworks, assembly and later inspection. With a realistic assessment of local weather and a close reading of the relevant product information, Bloomcabin offers a configuration that can complement your garden meaningfully.
Compare greenhouse forms and glazing options against your site requirements.
